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Influence of different rotational speeds on the structural and optical properties of CsPbBr3 perovskite films

YAXIN CHEN1, FEI ZHAO2,* , PEIZHI YANG3

Affiliation

  1. School of Electrical and Electronic Engineering, Anhui Institute of Information Technology, Wuhu 241000, China
  2. School of Photoelectric Engineering, Changzhou Institute of Technology, Changzhou 213032, China
  3. College of Energy and Environmental Science, Yunnan Normal University, Kunming 650500, China

Abstract

The all-inorganic CsPbBr3 perovskite film has attracted widespread attention from the academic community due to its excellent air and thermal stability. However, the grain growth of CsPbBr3 perovskite film is uneven. Here, high-quality CsPbBr3 perovskite film was successfully prepared by adjusting the rotational speed. When the rotational speed increases from 1000rpm to 2000rpm, CsPbBr3 perovskite film exhibits higher crystallinity, better uniformity, larger average grain size (583nm), and smaller optical band gap (2.341eV). As the rotational speed further increases to 3000rpm, the crystallinity and uniformity of CsPbBr3 perovskite film deteriorate and its average grain size decreases and its optical band gap increases. Therefore, the optimal rotational speed is 2000rpm under the condition of this experiment..

Keywords

CsPbBr3, Crystallinity, Uniformity, Optical band gap.

Submitted at: April 23, 2025
Accepted at: Dec. 4, 2025

Citation

YAXIN CHEN, FEI ZHAO, PEIZHI YANG, Influence of different rotational speeds on the structural and optical properties of CsPbBr3 perovskite films, Journal of Optoelectronics and Advanced Materials Vol. 27, Iss. 11-12, pp. 580-586 (2025)