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The effect of doping CaBr2 on the CsPbBr3 film for photovoltaic application

FEI ZHAO1,* , YIXIN GUO2,* , PEIZHI YANG3, JUNHAO CHU4

Affiliation

  1. School of Photoelectric Engineering, Changzhou Institute of Technology, Changzhou, Jiangsu, 213002, China
  2. Department of Physics, Shanghai Normal University, Shanghai 200233, China
  3. Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming 650500, China
  4. Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China

Abstract

All-inorganic perovskite CsPbBr3 has gained widespread attention for photovoltaic application due to its preeminent stability. However, the conversion efficiency of CsPbBr3 solar cell is relatively low. Herein, a novel doping strategy has been employed in CsPbBr3 solar cell, which generates multiple benefits to enhance the cell performance. After doping CaBr2, carbon-based CsPbBr3 solar cell achieves a higher efficiency of 2.48%. The mechanism behind the efficiency improvement is that CaBr2-doped CsPbBr3 films have higher crystallinity, smaller optical band gap, and lower carrier recombination probability. This work opens up a simple and efficient method for enhancing the photovoltaic performance of all-inorganic perovskite solar cell..

Keywords

CsPbBr3, Doping CaBr2, Optical band gap, Perovskite solar cell.

Submitted at: Aug. 29, 2024
Accepted at: June 4, 2025

Citation

FEI ZHAO, YIXIN GUO, PEIZHI YANG, JUNHAO CHU, The effect of doping CaBr2 on the CsPbBr3 film for photovoltaic application, Journal of Optoelectronics and Advanced Materials Vol. 27, Iss. 5-6, pp. 255-260 (2025)