Sun Chen, Zhong Qian-Qian, Zhang Xin, Xiao Pan-Chao, Cheng Yu, Gao Yu-Jia, Liu Guo-Dong, Lei Xiao-Wu
School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu, Shandong 273155, P. R. China.
Shanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, 1239 Siping Rd., Shanghai 200092, P. R. China.
Inorg Chem. 2021 Dec 20;60(24):18879-18888. doi: 10.1021/acs.inorgchem.1c02661. Epub 2021 Dec 6.
Low-dimensional organic-inorganic hybrid metal halide materials have been extensively studied due to their excellent optoelectronic performances. Herein, by using the facile wet-chemistry method, we designed one new hybrid cadmium bromide of (HAEP)CdBr·2Br based on discrete octahedral [CdBr] units. Remarkably, the bulk crystal of (HAEP)CdBr·2Br exhibits strong broadband orange-red light emission from the radiative recombination of self-trapped excitons (STEs) with a high photoluminescence quantum yield (PLQY) of 9%. Benefiting from the highly efficient luminescent performance, this 0D cadmium perovskite can be utilized as an excellent down-conversion red phosphor to assemble a white light-emitting diode, and a high color rendering index (CRI) of 93 is realized. As far as we know, this is the first orange-red light-emitting hybrid cadmium perovskite which promotes the full-color display in this system.
低维有机-无机杂化金属卤化物材料因其优异的光电性能而受到广泛研究。在此，我们采用简便的湿化学方法，基于离散八面体[CdBr]单元设计了一种新型的(HAEP)CdBr·2Br杂化溴化镉。值得注意的是，(HAEP)CdBr·2Br的块状晶体通过自陷激子（STE）的辐射复合表现出强烈的宽带橙红光发射，光致发光量子产率（PLQY）高达9%。受益于其高效的发光性能，这种零维镉基钙钛矿可作为优异的下转换红色荧光粉用于组装白光发光二极管，实现了高达93的高显色指数（CRI）。据我们所知，这是第一种促进该体系全彩显示的橙红色发光杂化镉基钙钛矿。
