CONTROL GROWTH OF LARGE GRAINED HYBRID PEROVSKITE THIN FILMS FOR SOLAR CELL APPLICATIONS

摘要

Control growth of hybrid perovskite thin films plays a critical role in determining the solar cell efficiency which is largely dominated by the structure and morphology of these hybrid perovskite. Recent studies by varying the composition, processing methods and parameters, hybrid perovskite thin films with the thickness of 300 to 600 nm reveal strong correlation between quality of perovskite crystal and solar cell efficiency. In this talk, we will present results in fabricating large grained, single crystalline perovskite up to mm size. Large grain perovskites have smaller number of grain boundary with less defect sites, larger diffusion length, and longer decay lifetime. All of the above factors contribute to an optimized power conversion efficiency (>18% in planar device without the involvements of mesoporous metal oxide particles).