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"Recrystallization"

Laser-Induced Recrystallization of Perovskite Materials for High-Performance Flexible Light-Emitting Diode
Jae Chan Heo, Ji Eun Kim, Dong Gyu Lee, Yun Sik Hwang, Yu Mi Woo, Han Eol Lee, Jung Hwan Park
J Electr Electron Mater 2023;36(3):286-291.   Published online May 1, 2023
DOI: https://doi.org/10.4313/JKEM.2023.36.3.12
Perovskite materials are promising candidates for next-generation optoelectronic devices owing to their outstanding external quantum efficiency, high color purity, and ability to tune the light emission wavelength. However, conventional thermal annealing processes caused the degradation of perovskite, resulting in poor optoelectronic properties and a short lifetime. Herein, we propose a laser-induced recrystallization of perovskite thin film to enhance its light-emitting properties. Laser-induced recrystallization process was performed using rapid and instantaneous laser heating, which successfully induced grain growth of the perovskite material. The laser processing conditions were thoroughly optimized based on theoretical calculations and various material analyses such as x-ray diffraction, scanning electron microscope, and photoluminescence spectroscopy.
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