卤化物
相变
激子
材料科学
化学物理
荧光
阳离子聚合
相(物质)
八面体
离子
红移
光电子学
纳米技术
化学
光学
无机化学
凝聚态物理
物理
有机化学
高分子化学
量子力学
银河系
作者
Xuening Sun,Min Wu,Yue Wang,Yongguang Li,Qingfeng Dong,Kai Wang,Guanjun Xiao,Bo Zou
标识
DOI:10.1021/acs.jpclett.3c03625
摘要
Three-dimensional (3D) cationic lead halide hybrids constructed by organic ions and inorganic networks via coordination bonds are a promising material for solid-state lighting due to their exceptional environmental stability and broad-spectrum emission. Nevertheless, their fluorescence properties are hindered by the limited lattice distortion from extensive connectivity within the inorganic network. Here, a dramatic 100-fold enhancement of self-trapped exciton (STE) emission is achieved in 3D hybrid material [Pb2Br2][O2C(CH2)4CO2] via pressure-triggered phase transition. Notably, pressure-treated material exhibits a 110 nm redshift with 1.5-fold enhancement compared to the initial state after pressure was completely released. The irreversible structural phase transition intensifies the [PbBr3O3] octahedral distortion, which is highly responsible for the optimization of quenched emission. These findings present a promising strategy for improving the optical properties of 3D halide hybrids with relatively high stability and thus facilitate their practical applications by pressure-driven phase transition engineering.
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