卤化物
光致发光
化学
四面体
激子
八面体
相(物质)
金属卤化物
金属
光发射
化学物理
发光
光电子学
纳米技术
结晶学
晶体结构
无机化学
凝聚态物理
材料科学
物理
有机化学
作者
Qian Li,Zhongwei Chen,Bo Ye,Li Tan,Bin Xu,Hanqiao Jiang,Yusheng Zhao,Jiang Tang,Zewei Quan
摘要
Self-trapped exciton (STE) emissions derived from inorganic octahedral units make metal halide perovskites promising photoluminescence materials for light-emitting applications. However, there is still little understanding of the intrinsic STE emissions in metal halide perovskites or derivatives with nonoctahedral units. In this work, via high pressure compression, remarkable STE emission enhancement is, for the first time, realized in one-dimensional CsCu2I3 crystals with {CuCl4} tetrahedral units. The intertetrahedral distortion is believed to induce the slight emission enhancement of the ambient phase under initial compression. Notably, the obvious structural distortions of both inter- and intratetrahedra are responsible for the significant emission enhancement of the high pressure phase. This work not only sheds light on the structure-optical property relationships of tetrahedron-based halide complexes, but also may provide guidance for the design and fabrication of highly luminescent metal halides.
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