Preparation of carbon electrode perovskite solar cells based on absorption layer defect regulation
WANG Nannan, GAO Yixuan, ZHANG Xinyu, FENG Lina, WANG Yijia , WEI Qingbo*
(College of Chemistry & Chemical Engineering, Yanan University, Key Laboratory of Chemical Reaction Engineering of Shaanxi Province, Yanan 716000, Shaanxi, China)
Abstract:
Defect control is one of the effective strategies to improve the photoelectric conversion efficiency and stability of perovskite solar cells. The defects of perovskite layer can be effectively passivated by functional additives so as to improve the performance of perovskite solar cells. This paper systematically explores the passivation of defects in perovskite layer by HMPA, and forms stable complexes with uncoordinated Pb2+ on the surface and inside of perovskite film, and further to control the nucleation and growth rate of perovskite grain, and further to promote the formation of high quality perovskite film. The effect of HMPA on the photoelectric performance of perovskite film and devices was mainly investigated. Finally, the best photoelectric conversion efficiency of 13.89% was obtained. Compared with the device without HMPA treatment, the photoelectric conversion efficiency and stability of the device were improved.
KeyWords:
perovskite solar cells; defect passivation; carbon electrode; stability
