| Abstract Scope |
Hybrid perovskites solar cells have achieved impressive photovoltaic power conversion efficiency exceeding 25%, but there are critical issues for realizing their practical application, including device operational stability under light and elevated temperature. In this talk, I will introduce our recent research efforts on utilizing two-dimensional (2D) materials, including 2D boron nitrides, as additives in hybrid perovskite solar cells. The results demonstrate remarkably improved device stability and power conversion efficiency, which are primarily attributed to an increased crystallization kinetics by 2D boron nitrides, which leads to enlarged grain size and reduced grain boundary areas, as confirmed by in-situ synchrotron X-ray scattering during the perovskite-forming thermal annealing step. I will also briefly discuss 2D MoS2 additive that similarly impart improved hybrid solar cell performance and stability. |