Center for Excitonics

Events

Optical modelling of ABX3 perovskites for solar cells with improved performance

December 5, 2016 at Perovskite Symposium: 12pm-4pm/ 36-462

Miguel Anaya
Institute of Materials Science, Seville

ABX3 perovskites represent a novel field of research in third generation PV, with efficiencies competing with those leading the solar race in the last decades. This irruption in the scientific scenario is a direct consequence of the unique properties of this material, which are still interrelated pieces of a big puzzle to be assembled in order to understand its working principles.

In this talk, I will give an overview on the optical properties of this family of perovskites and perovskite-based solar cells. In order to understand light propagation in these materials is key to attain their optical constants (n,k). In this regard I will introduce how different preparation methods lead to different values of such constants, affecting light-matter interaction effects. The in-depth characterization, understanding and modelling of the optics of perovskites has allowed my group proposing optimized photovoltaic device architectures when ABX3 perovskites are integrated as photoactive layers. We have developed optical designs to understand the behavior of above-20% efficiency cells, and also to propose for the first time a perovskite-perovskite tandem cell that harvests up to 1150 nm of the solar radiation spectrum. Moreover, I will present our results on the theoretical and experimental realization of efficient devices showing bright structural colors on demand by integrating a novel specifically designed one dimensional photonic crystal as scaffold. Finally, I will discuss about our recent advances on the development of spatially confined perovskite nanocrystals whose optical properties are strongly modified. This novel, easily scalable, fabrication approach may open the path to the fabrication of perovskite-based optoelectronic devices with performances governed by quantum size effects.

Miguel Anaya is a La Caixa Fellow at the Institute of Materials Science of Seville pursuing a Ph.D. degree in Science and Technology of New Materials. He graduated from Autonomous University of Madrid in 2012 with a B.S.+M.S. in Physics, and he obtained a second M.S. in Materials Science in 2013 at the University of Seville. His work covers several aspects related to the optical properties of ABX3 materials. He has been recognized in the last year with the SPIE Scholarship and the E-MRS Student Award for his contributions.