Effects of Lead Iodide Crystallization on Photovoltaic Performance of Perovskite Solar Cells by the Vapor-Solid Reaction Method

Qin Zou; Guoyuan Zheng; Disheng Yao; Jilin Wang; Nan Tian; Shuyi Mo; Fei Long

doi:10.1021/acsomega.3c00318

Effects of Lead Iodide Crystallization on Photovoltaic Performance of Perovskite Solar Cells by the Vapor-Solid Reaction Method

ACS Omega. 2023 Mar 24;8(13):12430-12438. doi: 10.1021/acsomega.3c00318. eCollection 2023 Apr 4.

Authors

Qin Zou¹, Guoyuan Zheng¹, Disheng Yao¹, Jilin Wang^{1

2}, Nan Tian¹, Shuyi Mo¹, Fei Long^{1

2}

Affiliations

¹ Guangxi Key Laboratory of Optical and Electronic Material and Devices, School of Materials Science and Engineering, Guilin University of Technology, 12 Jiangan Road, Guilin, Guangxi 541004, China.
² Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources, Guilin University of Technology, 12 Jiangan Road, Guilin, Guangxi 541004, China.

Abstract

The vapor-solid reaction method (VRM) is one of the promising techniques to prepare high-performance perovskite solar cells. Herein, PbI₂ precursor films were prepared by vacuum evaporation. It was found that the PbI₂ precursor films exhibit high crystallinity and orderly morphology at the substrate temperature of 110 °C. On this basis, the precursor films were prepared by VRM to obtain high-quality perovskite films and the power conversion efficiency (PCE) of perovskite solar cells (PSCs) devices reached 17.1%. In contrast, the PbI₂ film precursor was prepared on the substrate without being heated and the PCE of the final PSCs devices was only 13.04%.