Enhanced performance of BiI3-incorporated CsPbBr3 solar cells

Yuqi He; Zhenyang Li; Manying Liu; Saiqi Liu; Junjie Fu; Yange Zhang; Qiuye Li; Yuping Tong; Zhi Zheng

doi:10.1039/d3dt03055e

Enhanced performance of BiI₃-incorporated CsPbBr₃ solar cells

Dalton Trans. 2023 Nov 28;52(46):17308-17314. doi: 10.1039/d3dt03055e.

Authors

Yuqi He^{1

2}, Zhenyang Li^{1

3}, Manying Liu¹, Saiqi Liu¹, Junjie Fu¹, Yange Zhang¹, Qiuye Li², Yuping Tong³, Zhi Zheng¹

Affiliations

¹ Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, College of Chemical and Materials Engineering, Xuchang University, Henan 461000, China. manyingliu988@xcu.edu.cn.
² National & Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials, Henan University, Kaifeng 475004, China.
³ Institute of Materials and Engineering, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450045, China. yptong_zz@163.com.

PMID: 37937488
DOI: 10.1039/d3dt03055e

Abstract

CsPbBr₃ all-inorganic perovskite solar cells (PSCs) have been extensively investigated due to their remarkable stability. However, their limited film quality and wide bandgap result in a low photoelectric conversion efficiency (PCE). In this study, BiI₃ was incorporated into CsPbBr₃ films to synergistically enhance light absorption and film quality. It was found that the partial substitution of Pb²⁺ and Br^- with Bi³⁺ and I^- in CsPbBr₃ improved film quality, enhanced light absorption, and facilitated charge transfer and extraction. The device incorporating BiI₃-incorporated CsPbBr₃ as a light absorbing layer achieved an efficiency of 9.54%, exhibiting a significant enhancement of 19.4% compared to the undoped device. This work provides a new incorporating strategy that collaboratively improves light absorption and film quality.