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Performance improvement of simplified CsPbBr3 perovskite solar cell with doping BaBr2

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

Affiliation

  1. School of Photoelectric Engineering, Changzhou Institute of Technology, Changzhou, Jiangsu, 213032, 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 CsPbBr3 perovskite solar cells have attracted increasing attention due to their long-term stability. Here, all-inorganic CsPbBr3 perovskites are doped with BaBr2 to improve the efficiency of perovskite solar cells. The CsPbBr3 perovskite film displays better crystallinity, higher valence band maximum (VBM) position and lower carrier recombination probability after introducing BaBr2. Hence, the electron-hole transport layer-free device with the presence of BaBr2 achieves the improvement of the efficiency and stability. In particular, the efficiency of the device enhances from 1.88% to 2.86% by optimizing the doping concentration of BaBr2. In addition, the BaBr2-doped device without encapsulation exhibits excellent performance in air with relative humidity of ~80%.

Keywords

Doping BaBr2 , Simplified structure, CsPbBr3 perovskite solar cells, Photovoltaic performance.

Citation

FEI ZHAO, YIXIN GUO, QIMING YANG, PEIZHI YANG, JUNHAO CHU, Performance improvement of simplified CsPbBr3 perovskite solar cell with doping BaBr2, Optoelectronics and Advanced Materials - Rapid Communications, 19, 3-4, March-April 2025, pp.202-210 (2025).

Submitted at: Aug. 16, 2024

Accepted at: April 3, 2025