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Solar Energy Research Institute

Dr. Suhaila Sepeai

Email: Phone: 03-89217161

Current Position: Research Fellow

Specialisation: Silicon Solar Cell, Device Simulation, OLED

Dr. Suhaila Sepeai actively involved in UKM R&D since 2005. She involved in fabrication of nanoelectronic devices, namely organic light emitting diode (OLED) for flat panel display from 2005-2007 and silicon (Si) solar cell from 2008 to present. She has shown excellent achievements on nanotechnology and renewable energy in UKM. She has published a total of 31 publications, won 5 medals in national and international innovation and invention competitions, and has two patents filed. Moreover, she has presented her work in 19 international conferences.  She is a member of Malaysian Solid State Science and Technology Society (MASS). She has acquired vast experience in the thin film technology, device fabrication and device simulation. In 2008, she attached in Gratings Inc. at Albuquerque, USA for project of “Surface Passivation Studies by SiN/SiO2 Deposited by PECVD”. Her research on Si bifacial solar cell with conversion efficiency of ~17% has significant impact on the Si photovoltaic industry especially on the price reduction through manufacturing of thinner wafers. She has contributed to developing a new combination method for emitter and BSF formation for Si bifacial solar cell. Her method will eventually lead towards a low cost manufacturing cost by simplification of the fabrication process. Her current researches are now focusing on Silicon Quantum Dot (SiQD), amorphous Silicon-Germanium (SiGe), the implementation of potential material such as Perovskite on Si solar cell for enhancing the light absorption. She also expands the bifacial solar cell research aimed at simplified process such as in-situ diffusion for emitter and back surface field. Her aim in silicon solar cell research is improve the efficiency at low fabrication cost. In addition, she was also actively involve as a Key Instructor for the course of Green Technology in the Permata Pintar Negara, which is the brainchild of DS Rosmah Mansor since 2010. She becomes the pioneer to develop the curriculum for Green Technology which includes applications for solar cells.

B.Sc. Fizik, M.Sc. (Microengineering and Nanoelectronic), Ph.D (Renewable Energy), UKM, Certified Energy Manager (CEM) (ASEAN Energy Management Scheme (AEMAS))

Areas of Research
Silikon-Perovskite Tandem Solar Cell,  Bifacial Silicon Solar Cell, Solar Cell simulation



  1. Noor Fadhilah Ramli, Suhaila Sepeai, Nur Fairuz Mohd Rostan, Norasikin Ahmad Ludin, Mohd. Adib Ibrahim, Mohd Asri Mat Teridi, and Salem H. Zaidi. 2017. Model development of monolithic tandem silicon-perovskite solar cell by SCAPS simulation. American Institute Physics (AIP) Proceedings, 1838, 020006 (2017); doi: 10.1063/1.4982178.
  2. Nur Fairuz Mohd Rostan, Suhaila Sepeai, Noor Fadhilah Ramli, Ayu Wazira Azhari, Norasikin Ahmad Ludin, Mohd Asri Mat Teridi, Mohd Adib Ibrahim, and Saleem H. Zaidi. 2017. Characterization of perovskite layer on various nanostructured silicon wafer. American Institute Physics (AIP) Proceedings, 1838, 020020 (2017); doi: 10.1063/1.4982192.
  3. Nurfarizza Surhada Mohd Nasir, Nurul Aqidah Mohd Sinin, Suhaila Sepeai, Cheow Siu Leong, Kamaruzzaman Sopian, and Saleem H. Zaidi. 2017. Investigation near IR absorption in thin crystalline Si wafers with randomly etched nano-pillars. American Institute Physics (AIP) Proceedings, 1838, 020005 (2017); doi: 10.1063/1.4982177.
  4. Suhaila Sepeai, A.W.Azhari, Saleem H. Zaidi, K.Sopian. 2014. Advanced Texturing on Silicon Nanostructures on Low Lifetime Silicon Wafer. Proceedings of 8th WSEAS International Conference on Renewable Energy Sources 2014, Latest Trends in Renewable Energy and Environmental Informatics, 23-25 April 2014, Kuala Lumpur, pp.244-248.
  5. Suhaila Sepeai, Saleem H. Zaidi, M.Y.Sulaiman, K.Sopian, M.Khairunaz and A.W.Azhari. 2013. Numerical Analysis of Bifacial Solar Cell using PC1D Software. Proceedings of 39th IEEE Photovoltaic Specialists Conference, Tampa, Florida. 16-21 June 2013, pp. 2659 – 2663. DOI: 10.1109/PVSC.2013.6745020
  6. Suhaila Sepeai, S.L.Cheow, Saleem H. Zaidi, M.Y.Sulaiman, K.Sopian. 2013. Fabrication and Characterization of Al-BSF Bifacial Solar Cell. Proceedings of 39th IEEE Photovoltaic Specialists Conference, Tampa, Florida. 16-21 June 2013, pp. 2664 – 2668. DOI: 10.1109/PVSC.2013.6745021.
  7. A.W.Azhari, B. T. Goh, Suhaila Sepeai, M. Khairunaz, K. Sopian and Saleem H. Zaidi. Synthesis and characterization of self-assembled, high aspect ratio nm-scale columnar silicon structures. Proceedings of 39th IEEE Photovoltaic Specialists Conference, Tampa, Florida. 16-21 June 2013, pp. 0530 – 0534. DOI: 10.1109/PVSC.2013.6744206.
  8. M. Khairunaz, Suhaila Sepeai, A. W Azhari, K. Sopian, Saleem H. Zaidi. Investigation of XeF2 dry etching for contact isolation of screen printed IBC solar cell. Proceedings of 39th IEEE Photovoltaic Specialists Conference, Tampa, Florida. 16-21 June 2013, pp.2230 – 2233. DOI: 10.1109/PVSC.2013.6744920.
  9. Suhaila Sepeai, Cheow Siu Leong, K. Sopian, and Saleem H. Zaidi. Surface photovoltage characterization of Si wafers and solar cells. Photovoltaic Science and Engineering Conference (PVSEC). Taipei, Taiwan, 28 Okt-1 Nov 2013.
  10. Suhaila Sepeai, M.K.M.Desa, M.Y.Sulaiman, K.Sopian, N.A.Ludin, M.D.Norizam and Saleem H.Zaidi. Investigation on new combination method of emitter-BSF formation in npp+ bifacial solar cell. Photovoltaic Science and Engineering Conference (PVSEC). Taipei, Taiwan, 28 Okt-1 Nov 2013.


  1. Sohif Mat, Norasikin Ahmad Ludin, Suhaila Sepeai, Masita Mohamad, Ecosystem Discovery Journey Module Series, 2015, ISBN 978-967-5227-67-7 (set), ISBN 978-967-5227-68-4 (Module Energy), Penerbit LESTARI, UKM.

Articles in Antologi/Chapters in Book

  1. Suhaila Sepeai. Wartawan Penyiaran ke Saintis! Sainslah Vol 2. ISBN 978-967-2011-54-5. Apr 2017.
  2. Majalah Sains, Julai 2016. Gabungan Silikon-Perovskit: Pencetus Dimensi Baru Sel Suria Menuju 2030.

Monograph, Working Papers and Non-Periodical Publications


  1. Annual Asia-Pacific Solar Research Conference, 8th – 12th  December 2014, Sydney, Australia.
  2. The 6th World Conference on Photovoltaic Energy Conversion (WCPEC-6), 23rd – 27th Nov 2014, Kyoto, Japan.
  3. 8th WSEAS International Conference on Renewable Energy Sources (RES '14), 23-25 April 2014, Kuala Lumpur.
  4. 2013 International Conference on Advanced Materials Science and Technology (ICAMST 2013). 17/09/2013 - 18/09/2013, Yogjakarta, Indonesia.
  5. Photovoltaic Science and Engineering Conference (PVSEC 23). 28/10/2013 - 01/11/2013, Taipei, Taiwan.
  6. International Conference on Semiconductor Electronics 2012, 19th – 21st 2012, Kuala Lumpur.
  7. The 3rd ISESCO International Workshop and Conference on Nanotechnology (IWCN), 5th -7th Dis 2012, Bangi, Malaysia.
  8. International Conference on Nanotechnology – Research and Commercialization (ICONT), 6th-9th 2011, Sabah, Malaysia.
  9. IEEE – Regional Conference on Semiconductor Microelectronic (IEEE-RSM),  27th – 29th Sept 2011, Sabah, Malaysia.
  10. 2011 IEEE Conference on Sustainable Utilisation Development in Engineering and Technology (STUDENT2011), 23- 25 Nov 2011, Nottingham University, Semenyih, Selangor.


  1. Pengurus Tenaga Bertauliah (CEM) – ASEAN Energy Management Scheme (AEMAS).
  2. Appointed as Affiliate of Young Scientist Network – Akademi Sains Malaysia (YSN-ASM)



  1. Noor Fadhilah Ramli – PhD – Monolithically integrated of Si-Perovskite tandem solar cells with tunnel junction formation at the interface (Penyelia Utama).
  2. Nur Fairuz Mohd Rostan – Sarjana – Dual junction formation in Si-Perovskite solar cell (Penyelia Utama).
  3. Nurul Syahirah Aziz Jaafar – Sarjana – Fabrication of flexible energy delivery wave guide device for surgical application (Penyelia Utama).
  4. Muhammad Hatim Rohaizar – Sarjana – Partially Transparent Panel for Building Facade (Penyelia Utama).

Administrative Services/Committee

  1. Key Instructor for Green Technology Course in Permata Pintar (2010 – present).
  2. Chairman for KRA 4 UKM.

Reports: Technical/Research/Consultation

Research Grant

  1. Partially Transparent Bifacial Solar Panel for Building Façade. Sciencefund, Principal Researcher, 01/05/2017 – 30/04/2019 (On-going).
  2. Photon Absorption and Surface Passivation Enhancement of Silicon Quantum Dot (SiQD) Nanostructured Si Substrates. FRGS, Principal Researcher, 01/07/2014 - 30/06/2016 (Completed).
  3. Simplified Bifacial Solar Cell Processing using Simultaneous Solid Source Diffusion for Emitter and Back Surface Field (BSF) formation. GGPM, Principal Researcher, 01/08/2014 - 31/07/2016 (Completed).
  4. Passivation of nanostructured with a-Si layers in HIT solar cells. FRGS, Principal Researcher, 20/08/2010 - 19/08/2012 (Completed).


  1. RARA 6014 – Research Methodology – Master and PhD by Research under UKM Institutes.
  2. KKKK 6443 – Solar Energy - Master by Taught - Department of Chemical Engineering and Process.