Green Emitting Single-Crystalline Bulk Assembly of Metal Halide Clusters with Near-Unity Photoluminescence Quantum Efficiency
Green Emitting Single-Crystalline Bulk Assembly of Metal Halide Clusters with Near-Unity Photoluminescence Quantum Efficiency
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DOI：
10.1021/acsenergylett.9b00991
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发表时间：
2019-07-01
影响因子：
22
通讯作者：
Ma, Biwu
中科院分区：
文献类型：
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作者：
Zhou, Chenkun;Lin, Haoran;Ma, Biwu
在分子水平上具有零维（OD）结构的有机金属卤化物杂化物或金属卤化物的单晶体组装体是一类新兴的具有高光致发光量子效率（PLQE）和颜色可调谐性的发光材料。本文报道了一种新的金属卤化物簇合物单晶体组装体（bCl 3）（9）[ZnCl 4]（2）[Pb 3Cl 11]（bCl 3：1-butyl-1-methylpyrrolidinium）的合成和表征。详细的结构和电子物理研究表明，[Pb 3Cl 11]（5-）团簇中存在两种发射态，其布居数强烈依赖于周围的分子环境，这种分子环境控制着[Pb 3Cl 11]（5-）团簇的激发态结构畸变.这种新材料还具有高的化学稳定性和光稳定性。
Organic metal halide hybrids with zero-dimensional (OD) structure at the molecular level, or single-crystalline bulk assemblies of metal halides, are an emerging class of light-emitting materials with high photoluminescence quantum efficiencies (PLQEs) and color tunability. Here we report the synthesis and characterization of a new single-crystalline bulk assembly of metal halide clusters, (bmpy)(9)[ZnCl4](2)[Pb3Cl11] (bmpy: 1-butyl-1-methylpyrrolidinium), which exhibits green emission peaked at 512 nm with a remarkable near-unity PLQE at room temperature. Detailed structural and photophysical studies suggest that there are two emitting states in [Pb3Cl11](5-) clusters, whose populations are strongly dependent on the surrounding molecular environment that controls the excited state structural distortion of [Pb3Cl11](5-) clusters. High chemical- and photostability have also been demonstrated in this new material.