By Prof. Mohammad Khaja Nazeeruddin, Ecole polytechnique fédérale de Lausanne, Switzerland.
Methylammonium lead triiodide perovskite solar cells have emerged as credible contenders to conventional p-n junction photovoltaic devices. Perovskite material involves low cost precursors, capable of being processed via a variety of scalable methods and deliver high power conversion efficiencies comparable to thin film and crystalline silicon solar cells.1-2 Using CH3NH3PbI3 perovskite as an absorber layer and molecularly engineered functional hole transport material, power conversion efficiencies (PCE) over 22% were obtained.3-5 However, a fundamental understanding of the working principle of perovskite solar cells, and stability of the material is still lacking. In addition, an anomalous hysteresis behavior in the current-voltage characteristics is often reported in perovskite solar cells possibly related to ion migration and imbalanced extraction of charges. In this talk we present various deposition methods for perovskite absorbing layer, and the synthesis and characterization of novel hole transporting materials.
(1). Lee, M. M., Teuscher, J., Miyasaka, T., Murakami, T. N. & Snaith, H. J. Science 338, 643−647 (2012).
(2). Burschka, J., Pellet, N., Moon, S-J., Humphry-Baker, R., Gao, P., Nazeeruddin. & Grätzel, M, Nature 499, 316−319 (2013).
(4). Jingshan Luo, Jeong-Hyeok Im, Matthew T. Mayer, Marcel Schreier, Mohammad Khaja Nazeeruddin, Nam-Gyu Park, S. David Tilley, Hong Jin Fan, Michael Grätzel, Science, 2014, 345 (6204), 1593-1596.
(5). A molecularly engineered hole-transporting material for efficient perovskite solar cells, Michael Saliba & Mohammad Khaja Nazeeruddin, Nature Energy 1, Article number: 15017 (2016), doi:10.1038/nenergy.2015.17
Prof. Mohammad K. Nazeeruddin current research at EPFL focuses on Dye Sensitized and Perovskite Solar Cells, CO2 reduction, Hydrogen production, and Light-emitting diodes. He has published more than 530 peer-reviewed papers, ten book chapters, and inventor/co-inventor of over 65 patents. The high impact of his work has been recognized by invitations to speak at over 150 international conferences. Nazeeruddin has been named Thomson Reuters “Highly Cited Researcher” and one of the 19 scientists identified by Thomson Reuters as The World’s Most Influential Scientific Minds 2015 from all scientific domains. He appeared in the ISI listing of most cited chemists, and has more than 55 000 citations with an h-index of 110. He is teaching “Functional Materials” course at EPFL, and Korea University.
He is appointed as World Class University (WCU) professor by the Korea University, Jochiwon, Korea, Adjunct Professor by the King Abdulaziz University, Jeddah, Visiting Professor at King Saud University, Riyadh, Saudi Arabia and Eminent Professor at Brunei.