Recent Progresses on Defect Passivation toward Efficient Perovskite Solar Cells

• Published in: Advanced energy materials Vol. 10; no. 13
• Main Authors: Gao, Feng, Zhao, Yang, Zhang, Xingwang, You, Jingbi
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01-04-2020
• Subjects: Carrier transport; Crystal defects; defect passivation; Defects; Energy conversion efficiency; Grain boundaries; high‐efficiency; Passivity; Perovskites; Photovoltaic cells; Solar cells
• ISSN: 1614-6832; 1614-6840
• DOI: 10.1002/aenm.201902650

The disorderly distribution of defects in the perovskite or at the grain boundaries, surfaces, and interfaces, which seriously affect carrier transport through the formation of nonradiative recombination centers, hinders the further improvement on the power conversion efficiency (PCE) of perovskite solar cells (PSCs). Several defect passivation strategies have been confirmed as an efficient approach for promoting the performance of PSCs. Herein, recent progress in the defect passivation toward efficient perovskite solar cells are summarized, and a classification of common passivation strategies that elaborate the mechanism according to the location of the defects and the type of passivation agent is presented. Finally, this review offers likely prospects for future trends in the development of passivation strategies.
Perovskite solar cells still have huge room for improvement in photoelectric conversion efficiency. One of the constraints is the defects at the interface between the perovskite and the transport layer. Passivation is considered a key measure to limit defects. This paper systematically categorizes the effective passivation strategies for perovskites in recent years and gives a future outlook.