Open Access
ARTICLE
Effectively Inhibit Phase Separation to Improve Efficiency and Stability of All-Inorganic Planar CsPbIBr2 Perovskite Solar Cells
Miao He*, Miao Wu#, Duofa Wang, Tianjin Zhang*
Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Collaborative Innovation
Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Hubei Key Laboratory of Polymer
Materials, School of Materials Science and Engineering, Hubei University, Wuhan, 430062, China
* Corresponding Authors: Tianjin Zhang. Email: ; Miao He. Email:
# This author contributed equally to this work and should be considered co-first author
(This article belongs to the Special Issue: Perovskite Solar Cells)
Journal of Renewable Materials 2022, 10(11), 2883-2894. https://doi.org/10.32604/jrm.2022.020535
Received 30 November 2021; Accepted 25 January 2022; Issue published 29 June 2022
Abstract
The advancement in a power conversion efficiency (PCE) to reach 25%, the inorganic perovskites are being
explored intensively as promising optoelectronic materials due to their excellent photovoltaic performance, i.e.,
thermal stability and efficiency. Lately, the inorganic cesium lead halide perovskite is studied to show enhanced
light absorption, however, it suffers from the phase separate into I-rich and Br-rich phase which leads to poor film
quality due to difference of electronegativity. Herein, we propose a unique solution of controlling the rate of solvent volatilization followed by gel method to inhibit phase separation effectively to obtain the homogenous and
pinhole-free CsPbIBr
2 films with high crystalline quality. In this study, an inverted planar device based on a light
absorber of CsPbIBr
2 is prepared to achieve a power conversion efficiency of 8.8% (maintain a stabilized value of
8% in ambient air conditions). Surprisingly, the optimized cell without encapsulation shows excellent long-term
stability, as it maintained 90% initial efficiency over 500 h and controlled storage at around 45% relative humidity
and 25°C.
Keywords
Cite This Article
APA Style
He, M., Wu, M., Wang, D., Zhang, T. (2022). Effectively inhibit phase separation to improve efficiency and stability of all-inorganic planar cspbibr2 perovskite solar cells. Journal of Renewable Materials, 10(11), 2883-2894. https://doi.org/10.32604/jrm.2022.020535
Vancouver Style
He M, Wu M, Wang D, Zhang T. Effectively inhibit phase separation to improve efficiency and stability of all-inorganic planar cspbibr2 perovskite solar cells. J Renew Mater. 2022;10(11):2883-2894 https://doi.org/10.32604/jrm.2022.020535
IEEE Style
M. He, M. Wu, D. Wang, and T. Zhang "Effectively Inhibit Phase Separation to Improve Efficiency and Stability of All-Inorganic Planar CsPbIBr2 Perovskite Solar Cells," J. Renew. Mater., vol. 10, no. 11, pp. 2883-2894. 2022. https://doi.org/10.32604/jrm.2022.020535