Dr. Piyasiri Ekanayake (BSc, MSc, PhD) is a Senior Lecturer in Physics at the Universiti Brunei Darussalam (UBD). He obtained his PhD in Physics from Martin-Luther-University, Halle, Germany in 2000. Prior to the PhD, Dr. Ekanayake worked in the Institute of Non-Metallic Materials at ETH-Zurich, Switzerland, as a Guest Student (from 1994 to 1996). He has obtained his MSc (in 1996) and BSc (in 1992) in Physics from the University of Peradeniya, Sri Lanka.

During the period 2002 to 2011, he was attached to the Department of Physics, University of Peradeniya, Sri Lanka as a Senior Lecturer and as a Professor in Physics.

Dr. Ekanayake has obtained Research Fellowships from University of Leeds, UK (from 2000 to 2001) and University of Surrey, UK (from 2005 to 2006) to work on Soft Condenced Matter Physics. His research interests are in the areas of Solid Polymer Electrolytes, Organic Photovoltaics and Dye Sensitized Solar Cells.


Teaching Area

  • Fundamentals of Physics 
  • Physics in Medicine and Biology 
  • Materials Characterization Techniques


Current Research

  • Dye Sensitized Solar Cells
  • Solid Polymer Electrolytes


Research Interests

  • Dye Sensitized Solar Cells (DSSC) 
  • Solid Polymer Electrolytes 
  • Organic Photovoltaics
  • Polymers and Complexed Fluids



  • Piyasiri Ekanayake, Muhammad Raziq Rahimi  Kooh,  N.T.R.N. Kumara, Andery Lim, Mohammad Iskandar, Voo Nyuk Yoong, Lim Chee Ming, Combined experimental and DFT-TDDFT study of photo-active constituents of Canarium odontophyllum for DSSC application, Chemical Physics Letters (2013) 585, pp. 121-127
  • N.T.R.N. Kumara, Piyasiri Ekanayake, A. Lim, L.L.Y. Chiang, M. Iskandar, L.C. Ming, and G. Senadeera, Layered co-sensitization for enhancement of conversion efficiency of natural dye sensitized solar cells, Journal of Alloys and Compounds (2013) 581, pp. 186-191
  • N.T.R.N. Kumara, Piyasiri Ekanayake, A. Lim, M. Iskandar, and L.C. Ming, "Study of the Enhancement of Cell Performance of Dye Sensitized Solar Cells Sensitized with Nephelium lappaceum (F: Sapindaceae) Journal of Solar Energy Engineering (2013) 135(3), pp. 031014
  • N T R N Kumara, Muhammad Raziq Rahimi Kooh, Andery Lim, Mohammad Iskandar, Nyuk Yoong Voo, Chee Ming Lim,  Piyasiri Ekanayake, DFT/TDDFT and Experimental studies of natural pigments extracted from black tea waste for DSSC application International Journal of Photoenergy (2013) 2013, Article ID 109843, 8 pages
  • Lakshman Dissanayake, Nadie Rupasinghe, Piyasiri Ekanayake, Varuni Seneviratne, Nadeepa Jayasundara, Ionic Conductivity Enhancement in Solid Polymer Electrolyte by Nanosilica Filler from Rice Husk Ash J Solid State Electrochem (2013) 17, pp. 1775–1783