Miao He^*, Miao Wu^#, Duofa Wang, Tianjin Zhang^*

Journal of Renewable Materials, Vol.10, No.11, pp. 2883-2894, 2022, DOI:10.32604/jrm.2022.020535 - 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 More >

Yong Zhang

The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.1, pp. 106-107, 2019, DOI:10.32604/icces.2019.05864

Abstract Translational symmetry ensures phase coherency of a physical process among different units of a crystal, and thus produces collective quantum effects beyond the sum of the units. Any significant physical and/or chemical fluctuation, which typically exists in a semiconductor alloy or self-assembled or artificially grown nanostructure array, would hinder our ability to study and use the collective behavior relying on this coherency. Man-made structures remain as one of the central interests since semiconductor superlattices were proposed by Esaki and Tsu in 1970. Unfortunately, man-made structures with both genuine long- and short-range order are rare. Here… More >