人工晶体学报2024，Vol.53Issue(7)：1106-1111,6.
大尺寸高质量CsCu2I3晶体生长与发光性能研究
Growth and Luminescence Properties of Large Size and High Quality CsCu2I3 Crystals
摘要
Abstract
The all-inorganic CsCu2 I3 crystal was characterized by one-dimensional perovskite structure with orthorhombic crystal system and Cmcm space group,which was expected to be widely used in optoelectronic devices.In this paper,a transparent and high-quality CsCu213 single crystal with diameter of 1 inch(1 inch=2.54 cm)was grown by vertical Bridgman method,employing recrystallized CuI as the raw material.The phase structure and stability of the crystal were investigated by means of X-ray powder diffraction and thermogravimetric analysis.The optical and luminescence performance of the crystal was studied by means of ultraviolet-visible transmission spectroscopy,photoluminescence spectroscopy,fluorescence lifetime and fluorescence quantum yield.In addition,the variable temperature fluorescence spectra were measured at 100～250 K.The photoluminescence intensity decreases with increasing temperature due to strong electro-phonon coupling.The exciton binding energy(Eb)of the crystal is 98.12 meV.The study shows that the CsCu2I3 crystal exhibits good optical properties.关键词
钙钛矿/CsCu2I3晶体/重结晶提纯/坩埚下降法/荧光光谱/衰减时间/变温荧光光谱Key words
perovskite/CsCu2I3 crystal/recrystallization purification/Bridgman method/fluorescence spectrum/decay time/variable temperature fluorescence spectrum分类
数理科学引用本文复制引用
陈鑫鑫,韩佳力,潘建国..大尺寸高质量CsCu2I3晶体生长与发光性能研究[J].人工晶体学报,2024,53(7):1106-1111,6.基金项目
国家自然科学基金(12375180,61775108) （12375180,61775108）
