Dr Piyasiri Ekanayake


Associate Professor, Faculty of Science


Dr. Piyasiri Ekanayake (BSc, MSc, PhD) is an Associate Professor 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 Condensed Matter Physics. His research interests are in the areas of Solid Polymer Electrolytes, Dye Sensitized Solar Cells and Perovskite Solar Cells.


BSc, MSc, PhD (All in Physics)


Dye Sensitized Solar Cells (DSSC)
Perovskite Solar Cells (PSC)


1. Solution-Based Fabrication Method with a Wide Process Window for Efficient Perovskite Solar Cells and Modules Using Highly-Purified Precursor Complex CH3NH3PbI3•DMF
Ozaki, Masashi; Nakaike, Yumi; Shimazaki, Ai; Jung, Mina; Maruyama, Naoki; Yakumaru, Shinya; Rafieh, Alwani; Ekanayake, Piyasiri; Saito, Takashi; Shimakawa, Yuichi; Sasamori, Takahiro; Murata, Yasujiro; Murdey, Richard; Wakamiya, Atsushi
Angew. Chem. Int. Ed., 58 (2019), 1 – 6

2. Acetylene carbon black-graphite composite as low-cost and efficient counter electrode for dye-sensitized solar cells (DSSCs)
Muna Fathiah Don, Piyasiri Ekanayake, Hideki Nakajima, Abdul Hanif Mahadi, Chee Ming Lim, Affiz Atod
IONICS (2019), DOI https://doi.org/10.1007/s11581-019-03071-9

3. Enhanced performance of CH3NH3PbI3-based perovskite solar cells by tuning the electrical and structural properties of mesoporous TiO2 layer via Al and Mg doping
Alwani Imanah Rafieh, Piyasiri Ekanayake, Atsushi Wakamiya, Hideki Nakajima and Chee Ming Lim
Solar Energy, 177 (2019), 474-381

4. Stacked rGO-TiO2 photoanode via electrophoretic deposition for highly efficient dye-sensitized solar cells
D.S.U. Peiris, Piyasiri Ekanayake, Mohammad Iskandar Petra
Organic Electronics, 59 (2018). 399-405

5. A rational design of high efficient and low-cost dye sensitizer with exceptional absorptions: Computational study of cyanidin based organic sensitizer
Kalpana Galappaththi, Piyasiri Ekanayake, Mohammad Iskandar Petra
Solar Energy, 161 (2018), 83-89


1. Efficient Star-Shaped Hole Transporting Materials with Diphenylethenyl Side Arms for an Efficient Perosvkite Solar Cell, Hyeju Choi, Sojin Park, Sanghyun Paek, Piyasiri Ekanayake, Mohammad Khaja Nazeeruddin, Jaejung Ko
Journal of Materials Chemistry A, 2014, 2, 19136–19140, DOI: 10.1039/C4TA04179H

2. Enhanced efficiency of dye-sensitized solar cells based on Mg and Laco-doped TiO2 photoanodes
Ako Rajour Tanyi, Alwani Imanah Rafieh, Piyasiri Ekanayake, Ai Ling Tan, David James Young, Zhang Zheng, Chellappan Vijila, Gomathy Sandhya Subramanian, R.L.N. Chandrakanthi
Electrochimica Acta (2015), 178, 240–248

3. Layered co-sensitization for enhancement of conversion efficiency of natural dye sensitized solar cells
N.T.R.N. Kumara, Piyasiri Ekanayake, A. Lim, L.L.Y. Chiang, M. Iskandar, L.C. Ming, and G. Senadeera
Journal of Alloys and Compounds (2013) 581, pp. 186-191, DOI: 10.1016/j.jallcom.2013.07.039

4. Combined experimental and DFT-TDDFT study of photo-active constituents of Canarium odontophyllum for DSSC application, Piyasiri Ekanayake, Muhammad Raziq Rahimi Kooh, N.T.R.N. Kumara, Andery Lim, Mohammad Iskandar, Voo Nyuk Yoong, Lim Chee Ming, Chemical Physics Letters (2013) 585, pp. 121-127, DOI: 10.1016/j.cplett.2013.08.094

5. Correlation of Silicone Incorporation into Hybrid Acrylic Coatings with the Resulting Hydrophobic and Thermal Properties, Rodriguez R, Alarcon CH, Ekanayake P, McDonald PJ, Keddie JL, Barandiaran MJ, Asua JM, Macromolecules, (2008), 41, 8537-8546, DOI: 10.1021/ma8006015
Macromolecules, (2008), 41, 8537-8546, DOI: 10.1021/ma8006015


Grant type: CRG, Grant Number: UBD/OAVCR/CRGWG(016)/140901, Project Title: Development of Nanomaterials for Perovskite and Dye Sensitized Solar Cells, Principal Investigator: Dr. Piyasiri Ekanayajke, Start Date: 01/09/2017, End date: 31/08/2020

Grant type: URG, Grant Number: UBD/PNC2/ 2/RG/1(176), Project Title: Natural Dye Sensitizers and Solid Polymer Electrolytes for Photoelectrochemical Cells, Investigators (PI/Co-PI): Dr. Piyasiri Ekanayake, (PI), Pg Dr Mohammad Iskandar(Co-PI), Start Date: 28/02/2011, End Date: 28/02/2014

Grant type: BRC
Principal Investigator of Dye Sensitized Solar Cells Research (DSSC) of S&T 17 Energy Research Grant – 2010, Total Energy Grant is 13.8 million BND and out of that 1.888 million BND is allocated for DSSC research


1. A Method to Enhance the Efficiency of Dye Sensitized and Perovskite Solar Cell
Piyasiri Ekanayake, Ako Rajour Tanyi, Alwani Imanah Rafieh, Tan Ai Ling, Lim Chee Ming

• US Patent granted (2017). Patent No. US 9,576,745 B2

2.. A Macroporous Ceramic Body, Method of Manufacture and uses thereof
Piyasiri Ekanayake, Mohamad Iskandar

• US Patent granted on 19th April 2016. Patent No. US 9,315,425 B2

• Patented in BRUNEI (Brunei Patent filing number: BN201/0007)

3.. A Method of Generating Currents
Piyasiri Ekanayake, Kushan Tennakoon, Mohammad Iskandar, Lim Chee Ming, Linda Lim Biaw Leng

• PATENTED IN BRUNEI (Brunei Patent filing number: BN2012/0008)

Industry, Institute, or Organisation Collaboration

Collaborative research has been done with Polymer Industry (2000-2001 and 2005-2006).


2000-2001: EPSRC Project on Microscale Polymer Processing (MuPP)
2005-2006: FP6 Project on Nanostructured waterborne polymer films with outstanding properties (NAPOLEON)

Over 30 scientists from six major UK Universities, Leeds, Bradford, Durham, Cambridge, Sheffield and Oxford, with industrial collaborators from BASF, BP, Dow, DSM, Dupont and INEOS, to address an important issue in polymer processing – to gain a systematic generic understanding of how molecular variables influence polymer process engineering.

2005-2006: EU Project on Nanostructured waterborne polymer films with outstanding properties (NAPOLEON)

13 academic partner universities and 7 companies to make possible a generation of radically-new products by developing a technology platform for the production of films with controlled nanostructure without the emission of organic solvents or residual monomer.


Second and third patents are having the potential to apply for generating current after development of the rest of the components of the dye sensitized solar cell.

The product related to the first patent is ready for the application.