Improvement of Photoluminescence of Perovskite CH$_{3}$NH$_{3}$PbI$_{3}$ by Adding Additional CH$_{3}$NH$_{3}$I during Grinding
Dou-Dou Qian1, Lei Liu1, Zhi-Xue Xing2, Rui Dong1, Li Wu1*, Hong-Kun Cai2*, Yong-Fa Kong1, Yi Zhang2, and Jing-Jun Xu1
1Key Laboratory of Weak-Light Nonlinear Photonics (Ministry of Education), School of Physics, Nankai University, Tianjin 300071, China 2College of Electronic Information and Optical Engineering and Tianjin Key Laboratory of Photo-electronic Thin Film Devices and Technology, Nankai University, Tianjin 300071, China
Abstract：The organic-inorganic hybrid perovskite CH$_{3}$NH$_{3}$PbI$_{3}$ has been a good candidate for many optoelectronic applications such as light-emitting diodes due to its unique properties. Optimizing the optical properties of the CH$_{3}$NH$_{3}$PbI$_{3}$ material to improve the device performance is a hot topic. Herein, a new strategy is proposed to enhance the light emission of CH$_{3}$NH$_{3}$PbI$_{3}$ phosphor effectively. By adding the reactant CH$_{3}$NH$_{3}$I powder in an appropriate proportion and simply grinding, the emission intensity of CH$_{3}$NH$_{3}$PbI$_{3}$ is greatly improved. The advantages of the proposed method are swiftness, simplicity and reproducibility, and no requirement for a complex organic ligand. The mechanism of this phenomenon is revealed by x-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, photoluminescence, and temperature-dependent photoluminescence. This study offers a unique insight for optimizing the optical properties of halide perovskite materials.
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2021, Vol. 38 
