极化(电化学)
光致发光
俘获
光学
材料科学
各向异性
激子
Crystal(编程语言)
光谱学
卤化物
凝聚态物理
分子物理学
光电子学
物理
化学
量子力学
生物
物理化学
无机化学
计算机科学
程序设计语言
生态学
作者
Yang Song,Ning Sui,Qiang Zhang,Fangfei Li,Liang Li,Kai Wang,Min Wu,Rui-Hua Xie,Xiangdong Meng,Hanzhuang Zhang,Yinghui Wang
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-06-30
卷期号:48 (14): 3629-3629
摘要
Low-dimensional networked organic-inorganic hybrid metal halide crystal has become an emerging hotspot material due to its opportunities and advantages in the development of white-light-emitting diodes. Therefore, its photoluminescence (PL) mechanism is important. Herein, we study the PL behavior of columniform TPP 2 MnBr 4 crystals using multi-spectroscopy. The temperature-dependent PL data show that the PL of the TPP 2 MnBr 4 crystal originates from the recombination of a self-trapping exciton. A polarization-dependent PL test suggests that the self-trapping exciton is anisotropic, which indicates that the distribution of self-trapping states is sensitive to the orientation of the crystal axis. Space-resolved PL spectroscopy shows that the anisotropy of PL gradually weakens along the orientation of the columniform crystal, which has a longer relaxation distance than traditional light-wave-guiding behavior. Thus, anisotropy of PL can exist before it disappears in the crystal. Our results elucidate the PL mechanism of low-dimensional networked organic-inorganic hybrid metal halide crystals and provide a foundation for advanced optical polarization devices based on them.
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