Shahzada Ahmad is an Ikerbasque professor. Prior to his current position, Dr. Ahmad has worked as program director (2012-2017) at Abengoa Research, a research division of multinational energy based conglomerate Abengoa. He finished his Ph.D from National Physical laboratory in the field of Materials chemistry and subsequently moved to the Max Planck Institute for Polymer Research, as Alexander von Humboldt Fellow to work on surface and interface studies. At École polytechnique fédérale de Lausanne, he developed nanoporous films for metal-free electro-catalysis and new redox shuttle. Dr. Ahmad is a prolific author and his scientific publications list reflects his diverse field of interest in the domain of physical chemistry, nanotechnology and materials science with a research mission to develop advanced materials for energy application. His work has led to the invitation to speak at many scientific or policy based conferences, inventor of patents, sit on the editorial board of scientific journals, European research council consolidator grant (2016) awardee and is cohort of distinguished scientist by World Economic forum. He is an advocate of renewable energy and passionately works on radically innovation technologies to address societal challenges.
Interface engineering and charge selective layer development for efficient and stable perovskite solar cells development
The current decade has witnessed the usage of perovskites as a semiconducting pigment for photovoltaic research. Excellent opto-electrical properties including high absorption coefficient, large carrier diffusion lengths and small exciton binding energy has been reported for solution processed perovskite based solar cell and this led to a monumental 23.7% power conversion efficiencies. In spite of this success in photovoltaic performance, perovskite solar cells are poorly stable under real working condition. Strategies, in terms of chemistry and processing have been adopted to overcome the instability issues, but suggest only incremental improvements. In this talk, we will discuss strategies to overcome intrinsic instability by means of surface passivation or additive addition in the active layer of perovskites. Further, the designing of novel charge selective layers, which are cost effective, efficient and are based on small molecule based organic semiconductor, will be exemplified.