Synergistic improvement of perovskite film quality for efficient solar cells via multiple chloride salt additives

Pengyang Wang; Qi Jiang; Yang Zhao; Yong Chen; Zema Chu; Xingwang Zhang; Yuqin Zhou; Jingbi You

doi:10.1016/j.scib.2018.05.003

Synergistic improvement of perovskite film quality for efficient solar cells via multiple chloride salt additives

Sci Bull (Beijing). 2018 Jun 15;63(11):726-731. doi: 10.1016/j.scib.2018.05.003. Epub 2018 May 9.

Authors

Pengyang Wang¹, Qi Jiang¹, Yang Zhao¹, Yong Chen¹, Zema Chu², Xingwang Zhang¹, Yuqin Zhou³, Jingbi You⁴

Affiliations

¹ College of Materials Science and Opto-electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.
² Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.
³ College of Materials Science and Opto-electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: yqzhou@ucas.ac.cn.
⁴ College of Materials Science and Opto-electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China. Electronic address: jyou@semi.ac.cn.

PMID: 36658822
DOI: 10.1016/j.scib.2018.05.003

Abstract

Perovskite crystal film quality is critical for obtaining efficient perovskite solar cells. Anti-solvent processing was used for fast crystallization of perovskite precursor film, which can form dense perovskite film. However, the crystals from this method are usually small due to the fast crystal growth process, which could lead to grain boundary recombination. Here, element chloride is introduced to enhance the perovskite layer crystallinity via slowing down the perovskite crystallization process by simultaneous introduction of methylammounium chloride (MACl) and cesium chloride (CsCl) into precursor solution. As a result, we achieve high quality of pin-hole free perovskite film with large crystal size. A power conversion efficiency of 21.55% with free of hysteresis of the device is obtained, which is among the highest efficiency of planar structure perovskite solar cells.

Keywords: Crystallization; Metal halide perovskite; Power conversion efficiency; Solar cells.