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Optical Characterization of Cubic and Pseudo-cubic Phase Perovskite Single Crystals Depending on Laser Irradiation Time
Appl. Sci. Converg. Technol.
Published online March 31, 2018
© 2018 The Korean Vacuum Society.

Hye Ryung Byun and Mun Seok Jeong*

Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
Correspondence to: E-mail: mjeong@skku.edu
Received March 28, 2018; Accepted March 30, 2018.
Abstract
Photovoltaic and optoelectronic devices based on hybrid metal halide perovskites (MAPbX3; MA = CH3NH3+, X = Cl-, Br-, or I-) are rapidly improving in power conversion efficiency. Also, during recent years, perovskite single crystals have emerged as promising materials for high-efficiency photovoltaic and optoelectronic devices because of their low defect density. Here we show that the light soaking effect of mixed halide perovskite (MAPbBr3-xIx) single crystals can be explained using photoluminescence, time-resolved photoluminescence, and Raman scattering measurements. Unlike Br-based single crystal, Br/I mixed single crystal show a strong light soaking effect under laser irradiation condition that was related to the existence of multiple phases.
Keywords : Perovskite single crystal, Light soaking effect


September 2018, 27 (5)