Department of Mechanical and Materials Engineering
University of Nebraska - Lincoln
Why Do Hybrid Perovskite Work So Well For Solar Cells and Applications Beyond?
Location: BTEC Room 135
Monday, February 15th 2016 - 11:00 am
The research of organometal trihalide perovskite solar cells continues to boom with device energy conversion efficiency approaching that of single crystal silicon solar cells within less than four years. One critical step in understanding why hybrid perovskite solar cells work so well is to determine the influence of defects on photon to current conversion process. I will present the advance in understanding the optoelectronic properties, unusual defect physics, and influence of defects on critical properties such as carrier diffusion length, charge recombination lifetime, ion migration and power conversion efficiency of solution processed perovskite materials. Finally I will also introduce our progress of using low temperature solution processes, which are particularly attractive in the fabrication of large area devices such as solar cells to reduce cost, to minimize the non-benign defects in perovskite thin films for high device efficiency to 20% in planar heterojunction architecture devices.