CsPbBr - CsPbBr钙钛矿复合材料的光学性质。
The optical properties of CsPbBr-CsPbBr perovskite composites.
作者信息
Gan Zhixing, Zheng Fei, Mao Wenxin, Zhou Chunhua, Chen Weijian, Bach Udo, Tapping Patrick, Kee Tak W, Davis Jeffrey A, Jia Baohua, Wen Xiaoming
机构信息
Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn 3122, Australia.
出版信息
Nanoscale. 2019 Aug 8;11(31):14676-14683. doi: 10.1039/c9nr04787e.
Although the optoelectronic applications of metal halide perovskites have been intensively investigated in recent years, the fundamental carrier dynamics of zero-dimensional (0D) Cs4PbBr6 perovskites has been relatively underexplored; in particular, the nature of the green fluorescence is highly debated. Nevertheless, the unique photophysical properties are of immense interest for a variety of potential applications. In this work, the green emission of the CsPbBr3-Cs4PbBr6 perovskite composites is studied using temperature dependent photoluminescence (PL). The PL spectra at different temperatures simultaneously contain two sub-peaks (520 nm and 550 nm), which are ascribed to the emissions of the band-edge and the defect trapped exciton of CsPbBr3. This finding will help to understand the controversial photoluminescence currently observed in different 0D Cs4PbBr6 perovskites.
尽管近年来金属卤化物钙钛矿的光电应用受到了广泛研究，但零维（0D）Cs4PbBr6钙钛矿的基本载流子动力学却相对较少被探索；特别是，绿色荧光的本质存在很大争议。然而，其独特的光物理性质对于各种潜在应用具有极大的吸引力。在这项工作中，使用温度相关光致发光（PL）研究了CsPbBr3 - Cs4PbBr6钙钛矿复合材料的绿色发射。不同温度下的PL光谱同时包含两个子峰（520 nm和550 nm），这归因于CsPbBr3的带边发射和缺陷捕获激子发射。这一发现将有助于理解目前在不同的0D Cs4PbBr6钙钛矿中观察到的有争议的光致发光现象。
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