@Article{jrm.2022.020535,
AUTHOR = {Miao He, Miao Wu, Duofa Wang, Tianjin Zhang},
TITLE = {Effectively Inhibit Phase Separation to Improve Efficiency and Stability of All-Inorganic Planar CsPbIBr<sub>2</sub> Perovskite Solar Cells},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {10},
YEAR = {2022},
NUMBER = {11},
PAGES = {2883--2894},
URL = {http://www.techscience.com/jrm/v10n11/48729},
ISSN = {2164-6341},
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<sub>2</sub> films with high crystalline quality. In this study, an inverted planar device based on a light
absorber of CsPbIBr<sub>2</sub> 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.},
DOI = {10.32604/jrm.2022.020535}
}