Professor I M Dharmadasa BSc, PhD, CPhys, CEng, FInstP, FWIF
Principal Lecturer and Professor
Summary
Professor Dharmadasa (Dharme) is a Senior Staff Grade Professor in Electronic Materials and Devices. He joined Sheffield Hallam University as a Senior Lecturer in August 1990. Dharme's research is focused on solar energy conversion, and he has over 37 years of experience in both industry and academia. He has published over 250 articles including 6 patents and a single authored book on 'Advances in Thin Film Solar Cells'.
Dharme is also a promoter of renewable applications in society. The theme of his work is to use clean energy for sustainable development and poverty reduction. He coordinated a British Council managed and DFID funded HE-Link in the 1990s, and this led to an evolution of a 'Solar-Village' project in order to empower rural communities.
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About
Dharme is the Head of Electronic Materials & Sensors Group within the Materials and Engineering Research Institute. His research focuses on the development of next generation, low-cost and high-efficiency solar cells. He has nearly four decades of experience in both industry and academia and his work has secured six patents, based on novel process developments. He has also proposed two new scientific models concerning development of photovoltaic solar cells. During his career he has successfully supervised 22 PhDs, 14 years of postdoctoral research and examined 26 postgraduate candidates.
Earlier in his career, Dharme graduated from University of Peradeniya in Sri Lanka by completing two BSc Honours degrees covering Chemistry, Physics and Mathematics. He won the Dr. Hewavitharana memorial prize for best performance for his Physics Special Degree in 1975, and joined the academic staff of the Physics Department at University of Peradeniya. After winning an open commonwealth scholarship in 1977, he completed his PhD thesis in 1980 at University of Durham, before returning to his post in Sri Lanka. A deep research interest generated by his PhD thesis led his return to the UK in 1984, where he carried out active research at University College Cardiff and the British Petroleum Company, before joining SHU in 1990.
Dharme is actively involved in the promotion of clean energy for social development and reduction of poverty. He has designed, piloted and monitored "Solar Village" project, and this is now in the replication stage within and outside Sri Lanka. He is a Fellow of the World Innovation Foundation and the Institute of Physics, UK. He referees for over 14 Journals and one of the Editors of J. of Materials; Materials in Electronics. He currently serves as Assessor/panel member for The European Commission and the Commonwealth Scholarship Commission. In the past he has served as an Assessor/panel member for the EPSRC, DTI and the British Council for a period of 6-years each. Dharme is one of the founding members of the APSL-UK charity and has served as the Vice President for 5 years and the President for two years (2009-2011). Now he is serving as a senior adviser within the Ex-Co of APSL-UK charity organisation.
Dharme's duties within the University include Teaching, Research and Scholarly Activities. He teaches various courses within Electronic Engineering and carries out active research within MERI in electronic materials and electronic devices. His current focus is on solar energy conversion with new device structures. He is currently developing next generation solar cells using graded bandgap device structures which he designed and experimentally tested in 2005. Dharme is also actively working to take solar energy technology from laboratory to the society through the "Solar Village" projects.
Further details at Research Gate: https://www.researchgate.net/profile/I_Dharmadasa/reputation
And at the Blogsite: https://dharmesblog.wordpress.com/
Awards:
• Won a Sri Lankan government scholarship on the merit of O/L results in 1966.
• Won the best student prize from high school (~2000 students) after A/L in 1969.
• Won Dr Hewavitharana memorial prize for the best performance at the Univ. in 1975.
• Won an open Commonwealth Scholarship from Association of Commonwealth
Universities for 3-year postgraduate research at Durham University in 1977.
• Won the media category of Eurosolar UK Prize Award for inspiring renewable energy applications in 2001.
• Inclusion in Marquis Who’s Who in Science and Eng. Directory-7th Ed., in 2002.
• Won the BRISLA Award for "Achievements in Science & Technology" in October 2016Areas of Interest:
- Development of semiconductors using low-cost electroplating;
- Social development projects for sustainable development. -
Teaching
Department of Engineering and Mathematics
Arts, Computing, Engineering and Sciences
Numerous PhD projects on materials & device development
Solar Villages for sustainable development.Subject Area/Group: Electrical, Electronic & Control Engineering
Modules:
- PV Technology for “Sustainability, Energy & Environmental Management”, part of the MSc Advanced Engineering.
- Engineering Product Analysis & Design (EPAD), part of BEng Electronic & Electrical Engineering (Year 2).
- Optical Fibre Communication for “Railway Communication”, part of BEng Railway Engineering.
- PV Technology for Various Engineering Degree Courses as a Guest Lecturer. -
Research
- Thin Films Research Centre
- Materials and Engineering Research Institute
Dharme's research programme aims to develop next generation solar cells based on electrodeposited semiconductors and graded bandgap device architectures. The work involves thin film materials deposition (CdS, ZnS, ZnTe, ZnSe, GaSe, InSe, CdSe, CdTe, CdMnTe etc.), material characterisation (XRD, SEM, EDAX, PEC, XRF, Raman, Hall-Effect, Optical Absorption, Film Thickness measurements etc.), device fabrication & assessment (I-V, C-V, Responsivity measurements, monitoring stability, lifetime, uniformity & yield) and scaling up of thin film solar cells. In this work, PhD candidates will use a selected number of materials when the candidate joins the group according to the requirements of the time, electroplate materials, use a wide range of modern analytical techniques to characterise layers & optimise growth conditions, and work with an active research Team. The work will mainly concentrate on doping of materials to achieve high efficiencies for the II-VI semiconductors based solar cells. The current lab-scale efficiency achieved is 15.3%, and the efforts are to achieve highest possible values from these materials. The solar cell sizes will also been scaled up achieving high efficiencies, and their stability, reproducibility and yield will be monitored.
New candidates joining the group will also learn and experience Renewable Energy applications for sustainable development, in particular the "Solar Village" programme designed, piloted and monitored by Dharme. This project has now entered into the replication stage.
Current Collaborators:
CONN Centre -USA
ED Institute in Kazakhstan
Dept. of Chemistry, Kelaniya, Sri Lanka
CREST, Loughborough University
Oweri, Kano & Akure Universities in Nigeria
Univ. of Malaya, Malaysia
Jawaharlal Nehru Centre, Bangalore, India
Sponsors for this Research:
Sheffield Hallam University
EPSRC - UK
DTI/UK Industry
ACU/CSC (C/W)
British Council/DFID
Governments of Nigeria, Malaysia, Libya, Kurdishtan -
Publications
OJO, A.A. and DHARMADASA, I (2018). Optimisation of pH of the CdCl2+Ga2(SO4)3 activation step of CdS/CdTe based thin-film solar cells. Solar Energy.
ECHENDU, O. K., DEJENE, B.F. and DHARMADASA, I (2018). The effects of anode material type on the optoelectronic properties of electroplated CdTe thin films and the implications for photovoltaic application. Journal of Physics and Chemistry of Solids, 114, 100-108.
ATAPATTU, H. Y. R., DE SILVA, D. S. M., PATHIRATNE, K. A. S. and DHARMADASA, I (2018). An investigation into the effect of rate of stirring of bath electrolyte on the properties of electrodeposited CdTe thin film semiconductors. Journal of Materials Science: Materials in Electronics. (In Press)
OJO, A.A., SALIM, H.I. and DHARMADASA, I (2018). The influence of ZnS crystallinity on all-electroplated ZnS/CdS/CdTe graded bandgap device properties. Journal of Materials Science: Materials in Electronics. (In Press)
OJO, A. A. and DHARMADASA, I (2017). Analysis of the Electronic Properties of All-electroplated ZnS, CdS and CdTe Graded Bandgap Photovoltaic Device Configuration. Solar Energy, 158, 721-727.
ECHENDU, Obi Kingsley, DEJENE, Francis Birhanu, DHARMADASA, I and EZE, Francis Chukwuemeka (2017). Characteristics of nanocrystallite-CdS produced by low-cost electrochemical technique for thin film photovoltaic application: The influence of deposition voltage. International Journal of Photoenergy, 2017, p. 3989432.
DHARMADASA, I and OJO, A. A. (2017). Unravelling complex nature of CdS/CdTe based thin film solar cells. Journal of Materials Science: Materials in Electronics, 28 (22), 16598-16617.
OJO, A. A. and DHARMADASA, I (2017). Analysis of electrodeposited CdTe thin films grown using cadmium chloride precursor for applications in solar cells. Journal of Materials Science: Materials in Electronics, 28 (19), 14110-14120.
ATAPATTU, H. Y. R., DE SILVA, D. S. M., PATHIRATNE, K. A. S., OLUSOLA, O. I. and DHARMADASA, I (2017). Necessity and relevance of precipitate free clear electrolytes for electrodeposition of CdS semiconductor materials with enhanced photovoltaic properties. Journal of Materials Science: Materials in Electronics. (In Press)
ECHENDU, O.K., DEJENE, F.B. and DHARMADASA, I (2017). An investigation of the influence of different transparent conducting oxide substrates/front contacts on the performance of CdS/CdTe thin-film solar cells. Journal of Materials Science: Materials in Electronics, 1-8. (In Press)
OJO, A.A. and DHARMADASA, I (2017). Effect of gallium doping on the characteristic properties of polycrystalline cadmium telluride thin film. Journal of Electronic Materials, 46 (8), 5127-5135.
OJO, A.A., OLUSOLA, I.O. and DHARMADASA, I (2017). Effect of the inclusion of Galium in normal Cadmium chloride treatment on electrical properties of CdS/CdTe solar cell. Materials Chemistry and Physics, 196, 229-236.
ECHENDU, Obi Kingsley, DEJENE, Francis Birhanu and DHARMADASA, I (2017). Fluorine-induced improvement of structural and optical properties of CdTe thin films for solar cell efficiency enhancement. Journal of Materials Science: Materials in Electronics, 1-16. (In Press)
OJO, A. A. and DHARMADASA, I (2017). Progress in development of graded bandgap thin film solar cells with electroplated materials. Journal of Materials Science: Materials in Electronics, 28 (9), 6359-6365.
OLUSOLA, O.I., MADUGU, M.L. and DHARMADASA, I (2017). Investigating the electronic properties of multi-junction ZnS/CdS/CdTe graded bandgap solar cells. Materials chemistry and physics, 191, 145-150.
OJO, A. A. and DHARMADASA, I (2017). Optimisation of pH of cadmium chloride post-growth-treatment in processing CDS/CDTE based thin film solar cells. Journal of Materials Science: Materials in Electronics. (In Press)
OJO, A. A., SALIM, H.I., OLUSOLA, O.I., MADUGU, M.L. and DHARMADASA, I (2017). Effect of thickness: as case study of electrodeposited CdS in Cds/CdTe based photovoltaic devices. Journal of Materials Science: Materials in Electronics, 28 (4), 3254-3263.
DHARMADASA, I, ECHENDU, O. K., FAUZI, F., ABDUL-MAFAF, N. A., OLUSOLA, O. I., SALIM, H.I., MADUGU, M.L and OJO, A.A. (2017). Improvement of composition of CdTe thin films during heat treatment in the presence of CdCl2. Journal of Materials Science: Materials in Electronics, 28 (3), 2343-2352.
OLUSOLA, O.I., MADUGU, M.L., OJO, A.A. and DHARMADASA, I. M. (2017). Investigating the effect of GaCl3 incorporation into the usual CdCl2 treatment on CdTe-based solar cell device structures. Current Applied Physics, 17 (2), 279-289.
ABDUL-MANAF, N A and DHARMADASA, I (2017). Development of CdTe thin film solar cells for military applications. Defence S&T Technical Bulletin, 10 (2), 129-141.
DHARMADASA, I, MADUGU, Mohammad L., OLUSOLA, Olajide I., ECHENDU, Obi K, FAUZI, Fijay, DISO, Dahiru, WEERADINGHE, Ajith, DHARMADASA, Ruvini, LAVERY, Brandon, JASINSKI, Jacek B., KRENTSEL, Tatiana A. and SUMANASEKERA, Gamini (2017). Electroplating of CdTe thin films from cadmium sulphate precursor and comparison of layers grown by 3-electrode and 2-electrode systems. Coatings, 7 (2), p. 17.
ECHEND, O.K., MBAMARA, U.S., OKEOMA, K.B., IROEGBU, C., MADU, C. A., NDUKWE, I.C. and DHARMADASA, I.M. (2016). Effects of deposition time and post-deposition annealing on the physical and chemical properties of electrodeposited CdS thin films for solar cell application. Journal of Materials Science: Materials in Electronics, 27 (10), 10180-10191.
DHARMADASA, I (2016). Solar Energy Strategy for Sri Lanka: The Solar Village Solution for Sustainable Development and Poverty Reduction. In: Science and technology for society forum, Sri Lanka, 7-10 September 2016. (Unpublished)
OJO, A. A. and DHARMADASA, I (2016). The Effect of Fluorine Doping on the Characteristic Behaviour of CdTe. Journal of Electronic Materials. (In Press)
OJO, A.A. and DHARMADASA, I (2016). 15.3% efficient graded bandgap solar cells fabricated using electroplated CdS and CdTe thin films. Solar Energy, 136, 10-14.
MADUGU, Mohammad Lamido, OLUSOLA, Olajide Ibukun-Olu, ECHENDU, Obi Kingsley, KADEM, Burak and DHARMADASA, I (2016). Intrinsic Doping in Electrodeposited ZnS Thin Films for Application in Large-Area Optoelectronic Devices. Journal of Electronic Materials, 45 (6), 2710-2717.
ECHENDU, O.K., OKEOMA, K.B., ORIAKU, C.I. and DHARMADASA, I.M. (2016). Electrochemical deposition of CdTe semiconductor thin films for solar cell application using two-electrode and three-electrode configurations: a comparative study. Advances in Materials Science and Engineering. (In Press)
DISO, D. G., FAUZI, F., ECHENDU, O. K., OLUSOLA, O.I. and DHARMADASA, I (2016). Optimisation of CdTe electrodeposition voltage for development of CdS/CdTe solar cells. Journal of Materials Science: Materials in Electronics. (In Press)
ATAPATTU, H. Y. R., DE SILVA, D. S. M., PATHIRATNE, K. A. S. and DHARMADASA, I (2016). Effect of stirring rate of electrolyte on properties of electrodeposited CdS layers. Journal of Materials Science: Materials in Electronics, 27 (5), 5415-5421.
SALIM, H. I., OLUSOLA, O. I., OJO, A. A., URASOV, K. A., DERGACHEVA, M. B. and DHARMADASA, I (2016). Electrodeposition and characterisation of CdS thin films using thiourea precursor for application in solar cells. Journal of Materials Science: Materials in Electronics, 1-14. (In Press)
DHARMADASA, I, ECHENDU, O. K., FAUZI, F., SALIM, H. I., ABDUL-MANAF, N. A., JASINSKI, J. B., SHEREHIY, A. and SUMANASEKERA, G. (2016). Study of Fermi level movement during CdCl2 treatment of CdTe thin films using Ultra-violet Photoemission Spectroscopy. Journal of Materials Science: Materials in Electronics. (In Press)
OJO, Ayotunde Adigun and DHARMADASA, Imyhamy Mudiy (2016). Electrodeposition of fluorine-doped cadmium telluride for application in photovoltaic device fabrication. Materials Research Innovations, 19 (7), 470-476.
OJO, A.A. and DHARMADASA, I (2016). Investigation of electronic quality of electrodeposited cadmium sulphide layers from thiourea precursor for use in large area electronics. Materials Chemistry and Physics, 180, 14-28.
OLUSOLA, Olajide Ibukun-Olu, MADUGU, Mohammad Lamido and DHARMADASA, I (2015). Growth of n- and p-type ZnTe semiconductors by intrinsic doping. Materials Research Innovations, 19 (7), 497-502.
OLUSOLA, O.I., MADUGU, M.L., ABDUL-MANAF, N.A. and DHARMADASA, I (2015). Growth and characterisation of n- and p-type ZnTe thin films for applications in electronic devices. Current Applied Physics, 16 (2), 120-130.
DHARMADASA, R., LAVERY, Brandon W., DHARMADASA, I and DRUFFEL, T. (2015). Processing of CdTe thin films by intense pulsed light in the presence of CdCl2. Journal of Coatings Technology and Research, 12 (5), 835-842.
DHARMADASA, I, ECHUNDU, O.K., FAUZI, F., ABDUL-MANAF, N.A., SALIM, H.I., DRUFFEL, T., DHARMADASA, R. and LAVEY, B. (2015). Effects of CdCl2 treatment on deep levels in CdTe and their implications on thin film solar cells; A comprehensive photoluminescence study. Journal of Materials Science: Materials in Electronics, 26 (7), 4571-4583.
PANDIT, Bill, DHARMADASA, Ruvini, DHARMADASA, I, DRUFFEL, Thad and LIU, Jinjun (2015). Ultrafast charge carrier relaxation and charge transfer processes in CdS/CdTe thin films. Physical Chemistry Chemical Physics, 17 (26), 16760-16766.
ECHENDU, O.K. and DHARMADASA, I (2015). The effect on CdS/CdTe solar cell conversion efficiency of the presence of fluorine in the usual CdCl2 treatment of CdTe. Materials chemistry and physics, 157, 39-44.
SALIM, H.I., PATEL, V., ABBAS, A., WALLS, J. M. and DHARMADASA, I (2015). Electrodeposition of CdTe thin films using nitrate precursor for applications in solar cells. Journal of Materials Science: Materials in Electronics, 26 (5), 3119-3128.
DHARMADASA, I, GUNARATNE, L., WEERASINGHE, A.R. and DEHERAGODA, K. (2015). Solar villages for sustainable development and reduction of poverty. [No Publisher]. (Unpublished)
ABDUL-MANAF, N.A., WEERASINGHE, A.R., ECHENDU, O. K. and DHARMADASA, I. M. (2015). Electro-plating and characterisation of cadmium sulphide thin films using ammonium thiosulphate as the sulphur source. Journal of Materials Science: Materials in Electronics, 26 (4), 2418-2429.
OLUSOLA, O. I., ECHENDU, O. K. and DHARMADASA, I (2015). Development of CdSe thin films for application in electronic devices. Journal of Materials Science: Materials in Electronics, 26 (2), 1066-1076.
ECHENDU, Obi and DHARMADASA, I (2015). Graded-Bandgap solar cells using all-electrodeposited ZnS, CdS and CdTe thin-films. Energies, 8 (5), 4416-4435.
MADUGU, M. L., BOWEN, L., ECHENDU, O. K. and DHARMADASA, I (2014). Preparation of indium selenide thin film by electrochemical technique. Journal of Materials Science: Materials in Electronics, 25 (9), 3977-3983.
ECHENDU, O.K., FAUZI, F., WEERASINGHE, A.R. and DHARMADASA, I. (2014). High short-circuit current density CdTe solar cells using all-electrodeposited semiconductors. Thin Solid Films, 556, 529-534.
ABDUL-MANAF, N. A., ECHENDU, O. K., FAUZI, F., BOWEN, L. and DHARMADASA, I (2014). Development of Polyaniline using electrochemical technique for plugging pinholes in Cadmium Sulfide/Cadmium Telluride Solar Cells. Journal of Electronic Materials, 43 (11), 4003-4010.
ECHENDU, O. K. and DHARMADASA, I (2014). Effects of thickness and annealing on optoelectronic properties of electrodeposited ZnS thin films for photonic device applications. Journal of Electronic Materials, 43 (3), 791-801.
SALIM, H I, ABDUL MANAF, A and DHARMADASA, I (2014). Electrodeposition of CdTe thin film solar cells using cadmium nitrate precursor. In: PVSAT-10 : 10th Photovoltaic Science, Applications and Technology, Loughborough, 23-25 April 2014. (Unpublished)
DHARMADASA, I and ECHENDU, Obi Kingsley (2014). Electrodeposition of electronic materials for applications in macroelectronic- and nanotechnology-based devices. In: KREYSA, Gerhard, OTA, Ken-ichiro and SAVINELL, Robert F., (eds.) Encyclopedia of Applied Electrochemistry. Springer, 680-691.
DHARMADASA, I, BINGHAM, Paul, ECHENDU, O., SALIM, H., DRUFFEL, T., DHARMADASA, R., SUMANASEKERA, G., DHARMASENA, R., DERGACHEVA, M., MIT, K., URAZOV, K., BOWEN, L., WALLS, M. and ABBAS, A. (2014). Fabrication of CdS/CdTe-Based thin film solar cells using an electrochemical technique. Coatings, 4 (3), 380-415.
ECHENDU, O.K., FAUZI, F., WEERASINGHE, A.R. and DHARMADASA, I. (2014). High short-circuit current density CdTe solar cells using all-electrodeposited semiconductors. Thin Solid Films, 556, 529-534.
DHARMADASA, R, DHARMADASA, I and DRUFFEL, T (2014). Intense pulsed light sintering of electrodeposited CdS thin films. Advanced Engineering Materials, 16 (11), 1351-1361.
DHARMADASA, Ruvini, LAVERY, Brandon, DHARMADASA, I and DRUFFEL, Thad (2014). Intense pulsed light treatment of cadmium telluride nanoparticle-based thin films. ACS Applied Materials & Interfaces, 6 (7), 5034-5040.
DHARMADASA, I (2014). Review of the CdCl2 treatment used in CdS/CdTe thin film solar cell development and new evidence towards improved understanding. Coatings, 4 (2), 282-307.
ECHENDU, O K, FAUZI, F, BOWEN, L and DHARMADASA, I (2013). All electrodeposited, multilayer graded bandgap solar cells using II-VI eemiconductors. In: MINE, A, JAGER-WALDAU, A and HELM, P, (eds.) 28th European Photovoltaic Solar Energy Converence and Exhibition. Munich, Germany, WIP, 2409-2413.
ECHENDU, O K, FAUZI, F, BOWEN, L and DHARMADASA, I (2013). All electrodeposited, multilayer graded bandgap solar cells using II-VI semiconductors. In: EU-PVSEC Proceedings : 28th European Photovoltaic Solar Energy Conference and Exhibition. EU-PVSEC, 2409-2413.
ECHENDU, O.K., WEERASINGHE, A.R., DISO, D.G., FAUZI, F. and DHARMADASA, I (2013). Characterization of n-Type and p-Type ZnS thin layers grown by an electrochemical method. Journal of Electronic Materials, 42 (4), 692-700.
FAUZI, F., DISO, D G, ECHENDU, O K, PATEL, V, PURANDARE, Yashodhan, BURTON, R and DHARMADASA, I (2013). Development of ZnTe layers using an electrochemical technique for applications in thin-film solar cells. Semiconductor Science and Technology, 28 (4), 045005.
DHARMADASA, I, KALYANARATNE, N.D.P.S.R. and DHARMADASA, R (2013). Effective harvesting of photons for improvement of solar energy conversion by graded bandgap multilayer solar cells. Journal of the National Science Foundation of Sri Lanka, 41 (2), 73-80.
FAUZI, F, ABDUL MANAF, N A, ECHENDU, O K and DHARMADASA, I (2013). Electrochemical deposition of organic and inorganic pin-hole plugging layers for CdS/CdTe solar cells. In: Solar Asia 2013 : 2nd International Conference on Solar Energy Materials, Solar Cells and Solar Energy Applications, Kuala Lumpur, Malaysia, 22-24 August, 2013. (Unpublished)
ABDUL MANAF, N A, ECHENDU, O K, FAUZI, F, BOWEN, L and DHARMADASA, I (2013). Electrodeposition and characterization of Polyaniline to develop organic/inorganic hybrid solar cells based on Cadmium Telluride. In: MINE, A, JAGER-WALDAU, A and HELM, P, (eds.) 28th European Photovoltaic Solar Energy Conference and Exhibition. Munich, Germany, WIP, 2327-2332.
ABDUL MANAF, N A, ECHENDU, O K, SALIM, H I, BOWEN, L and DHARMADASA, I (2013). Electrodeposition and characterization of polyaniline for development of organic/inorganic hybrid solar cells. In: Solar Asia 2013 : 2nd International Conference on Solar Energy Materials, Solar Cells and Solar Energy Applications, Kuala Lumpur, Malaysia, 22-24 August, 2013. (Unpublished)
DISO, D G and DHARMADASA, I (2013). Growth and optimisation of CdTe deposition voltage. In: Solar Asia 2013 : 2nd International Conference on Solar Energy Materials, Solar Cells and Solar Energy Applications, Kuala Lumpur, Malaysia, 22-24 August, 2013. (Unpublished)
DHARMADASA, R, ECHENDU, O K, DHARMADASA, I and DRUFFEL, T (2013). Intense pulsed light sintering of thin film semiconductors. In: Annual Nanotechnology Symposium, University of Louisville, Kentucky, United States, 16-17 August, 2013. (Unpublished)
DHARMADASA, I, ECHENDU, O K, ABDUL MANAF, N A, DERGACHEVA, M B, MIT, K A and URAZOV, K A (2013). Next generation solar cells using graded bandgap structures utilising nano- and micro-rod type semiconductors. In: Solar Asia 2013 : 2nd International Conference on Solar Energy Materials, Solar Cells and Solar Energy Applications, Kuala Lumpur, Malaysia, 22-24 August, 2013. (Unpublished)
DHARMADASA, R, ECHENDU, O. K., DHARMADASA, I and DRUFFEL, T. (2013). Rapid thermal processing in CdS/CdTe thin film solar cells by intense pulsed light sintering. ECS Transactions, 58 (11), 67-75.
DHARMADASA, R, ECHENDU, O K, DHARMADASA, I and DRUFFEL, T (2013). Rapid thermal processing in CdS/CdTe thin film solar cells by intense pulsed light sintering. In: 224th ECS Meeting, San Francisco, California, U.S., 27 Oct-1 Nov, 2013. (Unpublished)
DHARMADASA, I (2013). Solar villages for sustainable development. Association of Professional Sri Lankans in the UK.
DHARMADASA, I (2013). Solar villages for sustainable development. [Video]
DISO, D. G., HOTORO, M. A. Y., BICHI, T. S. and DHARMADASA, I (2013). Structural and optical properties of electrodeposited CdS thin film. Journal of Engineering and Applied Sciences, 5 (1), 67-76.
DHARMADASA, I, DISO, D G, ECHENDU, O K, SALIM, H I, ABDUL MANAF, N A, DERGACHEVA, M B, MIT, K A and URAZOF, K A (2013). Thin film photovoltaic solar cells with nano- and micro-rod type II-VI semiconducting materials grown by electroplating. In: 2013 IEEE 39th Photovoltaic Specialists Conference (PVSC), Tampa, Florida, United States, 16-21 June, 2013. (Unpublished)
DHARMADASA, I, DISO, D G, ECHENDU, O K, SALIM, H I, ABDUL MANAF, N A, DERGACHEVA, M B, MIT, K A and URAZOF, K A (2013). Thin film photovoltaic solar cells with nano- and micro-rod type II-VI semiconducting materials grown by electroplating. In: Proceedings of the 9th Photovoltaic Science Applications and Technology Conference (PVSAT-9). Solar Energy Society.
YATES, H M, SHEEL, D W, DHARMADASA, I, ECHENDU, O K and FAUZI, F (2013). The effects of TCO properties on CdS/CdTe PV solar cells. In: Proceedings of the 9th Photovoltaic Science, Applications and Technology Conference. Solar Energy Society, 211-214.
ECHENDU, O K, FAUZI, F, BOWEN, L and DHARMADASA, I (2013). n-CdTe-based multilayer graded bandgap solar cell using all-electrodeposited semiconductors. In: Proceedings of the 9th Photovoltaic Science, Applications and Technology Conference. Solar Energy Society, 147-150.
DHARMADASA, I (2012). Advances in thin-film solar cells. Singapore, Pan Stanford.
ELSHERIF, O.S., VERNON-PARRY, Karen, DHARMADASA, I, EVANS-FREEMAN, J.H., AIREY, R.J., KAPPERS, M.J. and HUMPHREYS, C.J. (2012). Characterization of defects in Mg doped GaN epitaxial layers using conductance measurements. Thin Solid Films, 520 (7), 3064-3070.
DHARMADASA, I, ECHENDU, O K and DHARMADASA, R (2012). Distortions observed in current-voltage characteristics of photovoltaic solar cells. In: 27th European Photovoltaic Solar Energy Conference and Exhibition. EU-PVSEC, 2308-2313.
SAMANTILLEKE, A.P., CERQUEIRA, M.F., HEAVENS, S., WARREN, P., DHARMADASA, I, MUFTAH, G.E.A., SILVA, C.J.R. and MARÍ, B. (2011). Characterisation of chemical bath deposited CdS thin films on different substrates using electrolyte contacts. Thin Solid Films, 519 (21), 7583-7586.
DHARMADASA, I (2011). Advances in CdTe, CuInGaSe2 and GaAs/AlGaAs thin film PV solar cells. In: Solar Asia 2011 : International Conference on Solar Energy Materials, Solar Cells and Solar Energy Applications, Kandy, Sri Lanka, 28-30 July 2011.
DISO, D G, FAUZI, F, ECHENDU, O K, WEERASINGHE, A R and DHARMADASA, I (2011). Electrodeposition and characterisation of ZnTe layers for application in CdTe based multi-layer graded bandgap solar cells. Journal of Physics: Conference Series, 286, 012040.
ITO, S., DHARMADASA, I, TOLAN, G.J., ROBERTS, J.S., HILL, G., MIURA, H., YUM, J.-H., PECHY, P., LISKA, P., COMTE, P. and GRÄTZEL, M. (2011). High-voltage (1.8V) tandem solar cell system using a GaAs/AlXGa(1−X)As graded solar cell and dye-sensitised solar cells with organic dyes having different absorption spectra. Solar Energy, 85 (6), 1220-1225.
DHARMADASA, I, ELSHERIF, O and TOLAN, G J (2011). Solar Cells Active in Complete Darkness. Journal of Physics: Conference Series, 286, 012041.
DHARMADASA, I and GUNARATNE, L (2011). Solar villages for social development and poverty reduction. In: Solar Asia 2011 : International Conference on Solar Energy Materials, Solar Cells and Solar Energy Applications, Kandy, Sri Lanka, 28-30 July 2011.
WEERASINGHE, Ajith, ECHENDU, O. K., DISO, D. J. and DHARMADASA, I (2011). Study of electrodeposited ZnS thin films grown with ZnSO4 and (NH4)2S2O3 precursors for use in solar cells. In: Solar Asia 2011 : International Conference on Solar Energy Materials, Solar Cells and Solar Energy Applications, Kandy, Sri Lanka, 28-30 July 2011.
MUFTAH, G. E. A., SAMANTILLEKE, A. P., WARREN, P. D., HEAVENS, S. N. and DHARMADASA, I (2010). Electrochemical deposition of CuInTe2 layers for applications in thin film solar cells. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 21 (4), 373-379.
DHARMADASA, I, ELSHERIF, O. and TOLAN, G.J. (2010). Experimental evidence for impurity photovoltaic effect in GaAs/AlGaAs based graded bandgap multi-layer solar cells. In: Proceedings of the 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion. EU PVSEC, 583-586.
DISO, D. G,, MUFTAH, G. E. A., PATEL, V. and DHARMADASA, I. M. (2010). Growth of CdS layers to develop all-electrodeposited CdS/CdTe thin-film solar cells. Journal of The Electrochemical Society (JES), 157 (6), H647.
ISLAM, A.B.M.O., CHAURE, N.B., WELLINGS, J., TOLAN, G. and DHARMADASA, I (2009). Development of electrodeposited ZnTe layers as window materials in ZnTe/CdTe/CdHgTe multi-layer solar cells. Materials Characterization, 60 (2), 160-163.
WELLINGS, J. S., SAMANTILLEKE, A. P., HEAVENS, S. N., WARREN, P. and DHARMADASA, I (2009). Electrodeposition of CuInSe2 from ethylene glycol at 150 degrees C. Solar Energy Materials & Solar Cells, 93 (9), 1518-1523.
DHARMADASA, I (2009). Fermi level pinning and effects on CuInGaSe2-based thin-film solar cells. Semiconductor Science and Technology, 24 (5).
DHARMADASA, I (2009). Latest developments in CdTe, CuInGaSe2 and GaAs/AlGaAs thin film PV solar cells. Current Applied Physics, 9 (2), E2-E6.
WELLINGS, J. S., SAMANTILLEKE, A. P., WARREN, P., HEAVENS, S. N. and DHARMADASA, I (2008). Comparison of electrodeposited and sputtered intrinsic and aluminium-doped zinc oxide thin films. Semiconductor Science and Technology, 23 (12).
DHARMADASA, I, TOLAN, G. J. and CAZAUX, M. (2008). Effects of defects in semiconductors on reproducibility and performance of thin-film photovoltaic solar cells. Semiconductor Science and Technology, 23 (3).
WELLINGS, J.S., CHAURE, N.B., HEAVENS, S.N. and DHARMADASA, I (2008). Growth and characterisation of electrodeposited ZnO thin films. Thin Solid Films, 516 (12), 3893-3898.
DHARMADASA, I, CHAURE, N. B., SAMANTILLEKE, A. P. and HASSAN, A. K. (2008). Multi Fermi level pinning at metal/Cu(InGa)(SeS)(2) interfaces. Solar energy materials and solar cells, 92 (8), 923-928.
DHARMADASA, I, CHAURE, N. B., TOLAN, G. J. and SAMANTILLEKE, A. P. (2007). Development of p(+), p, i, n, and n(+)-type CuInGaSe2 layers for applications in graded bandgap multilayer thin-film solar cells. Journal of The Electrochemical Society (JES), 154 (6), H466-H471.
DHARMADASA, I, BURTON, R. P. and SIMMONDS, M. (2006). Electrodeposition of CuInSe2 layers using a two-electrode system for applications in multi-layer graded bandgap solar cells. Solar Energy Materials & Solar Cells, 90 (15), 2191-2200.
DHARMADASA, I and HAIGH, J. (2006). Strengths and advantages of electrodeposition as a semiconductor growth technique for applications in macroelectronic devices. Journal of The Electrochemical Society (JES), 153 (1), G47-G52.
DHARMADASA, I, BUNNING, J. D., SAMANTILLEKE, A. P. and SHEN, T. (2005). Effects of multi-defects at metal/semiconductor interfaces on electrical properties and their influence on stability and lifetime of thin film solar cells. Solar Energy Materials & Solar Cells, 86 (3), 373-384.
CHAURE, N. B., SAMANTILLEKE, A. P., BURTON, R. P., YOUNG, J. and DHARMADASA, I (2005). Electrodeposition of p(+), p, i, n and n(+)-type copper indium gallium diselenide for development of multilayer thin film solar cells. Thin Solid Films, 472 (1-2), 212-216.
DHARMADASA, I, ROBERTS, J. S. and HILL, G. (2005). Third generation multi-layer graded band gap solar cells for achieving high conversion efficiencies - II: Experimental results. Solar Energy Materials & Solar Cells, 88 (4), 413-422.
DHARMADASA, I (2005). Third generation multi-layer tandem solar cells for achieving high conversion efficiencies. Solar Energy Materials & Solar Cells, 85 (2), 293-300.
CHAURE, N. B., YOUNG, J., SAMANTILLEKE, A. P. and DHARMADASA, I (2004). Electrodeposition of p-i-n type CuInSe2 multilayers for photovoltaic applications. Solar energy materials and solar cells, 81 (1), 125-133.
PREMARATNE, K., AKURANTHILAKA, S. N., DHARMADASA, I and SAMANTILLEKA, A. P. (2004). Electrodeposition using non-aqueous solutions at 170 degrees C and characterisation of US, CdSxSe(1-x) and CdSe compounds for use in graded band gap solar cells. Renewable Energy, 29 (4), 549-557.
DELSOL, T., SAMANTILLEKE, A. P., CHAURE, N. B., GARDINER, P. H., SIMMONDS, M. and DHARMADASA, I (2004). Experimental study of graded bandgap Cu(InGa)(SeS)(2) thin films grown on glass/molybdenum substrates by selenization and sulphidation. Solar energy materials and solar cells, 82 (4), 587-599.
DELSOL, T., SIMMONDS, M. C. and DHARMADASA, I (2003). Chemical etching of Cu(In,Ga)Se-2 layers for fabrication of electronic devices. Solar energy materials and solar cells, 77 (4), 331-339.
CHAURE, N. B., BORDAS, S., SAMANTILLEKE, A. P., CHAURE, S. N., HAIGH, J. and DHARMADASA, I (2003). Investigation of electronic quality of chemical bath deposited cadmium sulphide layers used in thin film photovoltaic solar cells. Thin Solid Films, 437 (1-2), 10-17.
DHARMADASA, I, CHAURE, N. B., YOUNG, J., SAMANTILLEKE, A. P. and DELSOL, T. (2003). Reply to Comment on 'New ways of developing glass conducting glass CdS/CdTe metal thin-film solar cells based on a new model', by Dharmadasa et al 2002 Semicond. Sci. Technol 17 1238-48. Semiconductor Science and Technology, 18 (8), 813-816.
CHAURE, N. B., SAMANTILLEKE, A. P. and DHARMADASA, I (2003). The effects of inclusion of iodine in CdTe thin films on material properties and solar cell performance. Solar Energy Materials & Solar Cells, 77 (3), 303-317.
FERNANDO, C. A. N., DE SILVA, P. H. C., WETHASINHA, S. K., DHARMADASA, I, DELSOL, T. and SIMMONDS, M. C. (2002). Investigation of n-type Cu2O layers prepared by a low cost chemical method for use in photovoltaic thin film solar cells. Renewable Energy, 26 (4), 521-529.
DHARMADASA, I, SAMANTILLEKE, A. P., CHAURE, N. B. and YOUNG, J. (2002). New ways of developing glass/conducting glass/CdS/CdTe/metal thin-film solar cells based on a new model. Semiconductor Science and Technology, 17 (12), 1238-1248.
FERNANDO, C. A. N., PRIYANKARA, W. T. C. and DHARMADASA, I (2002). Photocurrent enhancement of interlocked LB film dye layers in a p-CuSCN sensitised photoelectrochemical cell. Renewable Energy, 25 (1), 69-79.
SAMANTILLEKE, A. P., DHARMADASA, I, PRIOR, K. A., CHOY, K. L., MEI, J., BACEWICZ, R. and WOLSKA, A. (2001). Development of opto-electronic devices using electrochemically grown thin ZnSe layers. Journal of Materials Science: Materials in Electronics, 12 (11), 661-666.
DE SILVA, K. T. L., PRIYANTHA, W. A. A., JAYANETTI, J. K. D. S., CHITHRANI, B. D., SIRIPALA, W., BLAKE, K. and DHARMADASA, I (2001). Electrodeposition and characterisation of CuInSe2 for applications in thin film solar cells. Thin Solid Films, 382 (1-2), 158-163.
CHAHBOUN, A., CORATGER, R., AJUSTRON, F., BEAUVILLAIN, J., DHARMADASA, I and SAMANTILLEKE, A. P. (2000). Ballistic electron emission microscopy of Au/n-ZnSe contacts and local density of states spectroscopy. Journal of Applied Physics, 87 (5), 2422-2426.
CHAHBOUN, A., CORATGER, R., AJUSTRON, F., BEAUVILLAIN, J., DHARMADASA, I and SAMANTILLEKE, A. P. (2000). Ballistic electron emission microscopy of Au/n-ZnSe contacts and local density of states spectroscopy. Journal of Applied Physics, 87 (5), 2422-2426.
WIJESUNDARA, R. P., PERERA, L. D. R. D., JAYASURIYA, K. D., SIRIPALA, W., DE SILVA, K. T. L., SAMANTILLEKE, A. P. and DHARMADASA, I (2000). Sulphidation of electrodeposited cuprous oxide thin films for photovoltaic applications. Solar Energy Materials and Solar Cells, 61 (3), 277-286.
DHARMADASA, I, SAMANTILLEKE, A. P., YOUNG, J., BOYLE, M. H., BACEWICZ, R. and WOLSKA, A. (1999). Electrodeposited p-type and n-type ZnSe layers for light emitting devices and multi-layer tandem solar cells. Journal of Materials Science: Materials in Electronics, 10 (5-6), 441-445.
ILEPERUMA, O. A., VITHANA, C., PREMARATNE, K., AKURANTHILAKA, S. N., MCGREGOR, S. M. and DHARMADASA, I (1998). Comparison of CdS thin films prepared by different techniques for applications in solar cells as window materials. Journal of Materials Science: Materials in Electronics, 9 (5), 367-372.
SAMANTILLEKE, A. P., BOYLE, M. H., YOUNG, J. and DHARMADASA, I (1998). Electrodeposition of n-type and p-type ZnSe thin films for applications in large area optoelectronic devices. Journal of Materials Science: Materials in Electronics, 9 (4), 289-290.
SAMANTILLEKE, A. P., BOYLE, M. H., YOUNG, J. and DHARMADASA, I (1998). Growth of n-type and p-type ZnSe thin films using an electrochemical technique for applications in large area optoelectronic devices. Journal of Materials Science: Materials in Electronics, 9 (3), 231-235.
DHARMADASA, I, BLOMFIELD, C. J., SCOTT, C. G., CORATGER, R., AJUSTRON, F. and BEAUVILLAIN, J. (1998). Metal/n-CdTe interfaces: A study of electrical contacts by deep level transient spectroscopy and ballistic electron emission microscopy. Solid-State Electronics, 42 (4), 595-604.
DHARMADASA, I (1998). Recent developments and progress on electrical contacts to CdTe, CdS and ZnSe with special reference to barrier contacts to CdTe. Progress in Crystal Growth and Characterization of Materials, 36 (4), 249-290.
CAMMACK, D. S., MCGREGOR, S. M., MCCHESNEY, J. J., DHARMADASA, I, CLARK, S. A., DUNSTAN, P. R., BURGESS, S. R., WILKS, S. P. and ELIOTT, M. (1997). Photoemission study of the formation of intimate In-InGaAs(100) contacts at room and cryogenic temperatures. Journal of Applied Physics, 81 (12), 7876-7879.
CORATGER, R., GIRARDIN, C., BEAUVILLAIN, J., DHARMADASA, I, SAMANTHILAKE, A. P., FROST, J. E. F., PRIOR, K. A. and CAVENETT, B. C. (1997). Schottky barrier formation at metal/n-ZnSe interfaces and characterization of Au/n-ZnSe by ballistic electron emission microscopy. Journal of Applied Physics, 81 (12), 7870-7875.
BLOMFIELD, C. J., DHARMADASA, I, PRIOR, K. A. and CAVENETT, B. C. (1996). Discrete Schottky barriers observed for the metal/n-ZnSe(100) system. Journal of Crystal Growth, 159 (1-4), 727-731.
WARDLAW, R. S. and DHARMADASA, I (1996). Effects of multi-level Fermi pinning and aggregate surface area on Schottky barrier heights at metal/semiconductor interfaces. International journal of electronics, 81 (1), 59-65.
MCCHESNEY, J. J., HAIGH, J., DHARMADASA, I and MOWTHORPE, D. J. (1996). Electrochemical growth of GaSb and InSb for applications in infra-red detectors and optical communication systems. Optical Materials, 6 (1-2), 63-67.
MCGREGOR, S. M., DHARMADASA, I, WADSWORTH, I. and CARE, C. M. (1996). Growth of CdS and CdTe by electrochemical technique for utilisation in thin film solar cells. Optical Materials, 6 (1-2), 75-81.
DHARMADASA, I, BLOMFIELD, C. J., CORATGER, R., AJUSTRON, E., BEAUVILLAIN, J., SIMPSON, J., PRIOR, K. A. and CAVENETT, B. C. (1996). Microscopic and macroscopic investigation of electrical contacts to n type and p type ZnSe. Materials Science and Technology, 12 (1), 86-89.
SIRIPALA, W., PERERA, L. D. R. D., DESILVA, K. T. L., JAYANETTI, J. K. D. S. and DHARMADASA, I (1996). Study of annealing effects of cuprous oxide grown by electrodeposition technique. Solar Energy Materials and Solar Cells, 44 (3), 251-260.
DHARMADASA, I, IVES, M., BROOKS, J. S., FRANCE, G. H. and BROWN, S. J. (1995). Application of glow discharge optical emission spectroscopy to study semiconductors and semiconductor devices. Semiconductor Science and Technology, 10 (3), 369-372.
CORATGER, R., AJUSTRON, F., BEAUVILLAIN, J., DHARMADASA, I, BLOMFIELD, C. J., PRIOR, K. A., SIMPSON, J. E. and CAVENETT, B. C. (1995). Au/n-ZnSe contacts studied with use of ballistic-electron-emission microscopy. Physical Review B (PRB), 51 (4), 2357-2362.
DHARMADASA, I, BLOMFIELD, C. J., GREGORY, G. E. and HAIGH, J. (1994). Aging effects and Auger depth profiling studies of Sb/n-CdTe contacts. Semiconductor Science and Technology, 9 (2), 185-187.
DHARMADASA, I, BLOMFIELD, C. J., GREGORY, G. E. and YOUNG, J. (1994). Influence of chemical etching on metal contacts to II-VI compounds: CdTe and ZnSe. International journal of electronics, 76 (5), 961-967.
DHARMADASA, I, BLOMFIELD, C. J., GREGORY, G. E., CAVENETT, B. C., PRIOR, K. A. and SIMPSON, J. (1994). Microscopic and macroscopic investigation of electrical contacts to n-ZnSe. Surface and Interface Analysis, 21 (10), 718-723.
Other activities
- External examiner for over 26 PhD theses;
- Fellow of the World Innovation Foundation (FWIF) since June 2003;
- Fellow of the Institute of Physics (FInstP) since March 2004;
- Chartered Engineer (CEng) since March 1999;
- Chartered Physicist (CPhys) since 1986;
- Member of the British Council Advisers’ College (served for 6 years);
- Member of the DTI (Now TSB) panel of independent assessors and panel members to support New Renewable Energy Programme (served for 6 years);
- Member of the EPSRC Peer Review College (served for 6 years);
- Referee for 14 international journals (Semicond. Sci. Technol., Thin Solid Films, Surfaces & Interfaces, Solar Energy Materials & Solar Cells, Optical Materials, Solid State Electronics, J. Phys. D, Applied Physics, Chemistry & Physics of Matter, J. of Physical Chemistry, etc.);
- One of the Editors of Journal of Materials; Materials in Electronics;
- Member of the Editorial Board of "Solar-Asia" conference series;
- Member of the Editorial Board of the Scientific World Journal;
- President of APSL (Association of Professional Sri Lankans in the UK), Two year term from 2009-2011, one of the 6 APSL-UK initiators;
- Member of the Panel of Academic Advisers for Commonwealth Scholarship Commission and Fellowship Plan;
- Adviser to European Commission's FP7 & Horizon 2020 - Solar Energy Research Projects;
- Adviser to several Governments on Renewable Energy applications (Sri Lanka, UK, Romania, Canada).Post graduate supervision
Current PhD Students:
- Mohammed Madugu. Processing of Semiconductors and Thin Film Solar Cells Using Electroplating. Viva successfully completed in 2016.
- Ayotunde Ojo. Next Generation Solar Cells based on Graded Bandgap Device Structures. Final year PhD project.
- Hansika Atapattu. Development of Solar Energy Materials & Devices using Electrodeposition. Final year PhD student at Kelaniya University, Sri Lanka.
Past Doctoral Researchers:
Dharme has successfully supervised 22 projects (16 PhD projects as the Director of Studies (DoS), and 6 projects as the second supervisor). The 16 PhD projects completed as the DoS are listed below.
- Dr. O. I. Olusola. Optoelectronic devices based on graded bandgap structures utilising electroplated semiconductors. October 2016.
- Dr. H. I. Salim. Multilayer solar cells based on CdTe grown from nitrate precursor. March 2016.
- Dr. Azlian Nor Abdul-Manaf. Organic/Inorganic hybrid solar cells based on electroplated CdTe. November 2015.
- Dr. Fijay Fauzi. R&D of CdS/CdTe solar cells incorporating ZnTe layers. June 2015.
- Dr. Obi Kinsley Echendu. Thin film solar cells using All-Electrodeposited ZnS, CdS and CdTe materials. April 2014.
- Dr. Ajith Weerasinghe. Solar cells based on electrodeposited thin films of ZnS, CdS, CdSSe and CdTe. February 2013.
- Dr. Osama S. Elsherif. Electrical characterisation of defects in wide bandgap semiconductors. June 2012.
- Dr. Dahiru G. Diso. R&D of CdTe based thin film PV solar cells. October 2011.
- Dr. Gafar E. A. Mufta. R&D of CuInTe2 and CdTe based thin film PV solar cells. February 2010.
- Dr. Jayne S. Wellings. Electrodeposition of Semiconductors for Applications in Thin Film Solar Cells. August 2009.
- Dr. Gavin J. Tolan. Electro-Chemical Development of CuInGaSe2 based photovoltaic Solar cells. October 2008.
- Dr. Thomas Delsol. R&D of CuInSe2 - based Photovoltaic Solar cells. September 2001.
- Dr. Stephen M McGregor. Solar cells based on Electrodeposited CdS and CdTe Films. August 1999.
- Dr. J-J S D McChesney. Development of Electronic Materials for Infra-Red Detector Systems. Autumn 1999.
- Dr. Anura P Samantilleke. Electrodeposition of ZnSe, CdSe and CdTe thin film Materials and Optoelectronic Devices. September 1998.
- Dr. Chris J Blomfield. Study of Surface Modifications for Improved Selected Metal (II-VI) Semiconductor Based Devices.
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