论文标题
有机金属卤化物纳米管的散装组装
Bulk Assembly of Organic Metal Halide Nanoribbons
论文作者
论文摘要
有机金属卤化物杂种在分子水平上具有低维结构的杂种最近因其出色的结构可调性和独特的光物理特性而受到了极大的关注。在这里，我们首次报告了一维（1D）有机金属卤化物混合材料的合成和表征，该材料包含三个八面体单元宽度的金属卤化物纳米骨。据发现，具有化学配方c $ _8 $ h $ _ {28} $ n $ _5 $ _5 $ _3 $ _3 $ cl $ cl $ _ {11} $的这种材料显示出紫外线量效率（PLQE）在紫外线（UV）光照射下的双发光量子效率（PLQE）。光物理研究和密度功能理论（DFT）计算表明，在金属卤化物纳米纤维中，将离域的自由激子和局部自我捕获的激子共存，导致双重发射。这项工作再次显示了有机金属卤化物混合体的特殊可调节性，该混合体在具有局部状态的分子系统和带有电子带的晶体状态的分子系统之间桥接。
Organic metal halide hybrids with low-dimensional structures at the molecular level have received great attention recently for their exceptional structural tunability and unique photophysical properties. Here we report for the first time the synthesis and characterization of a one-dimensional (1D) organic metal halide hybrid material, which contains metal halide nanoribbons with a width of three octahedral units. It is found that this material with a chemical formula C$_8$H$_{28}$N$_5$Pb$_3$Cl$_{11}$ shows a dual emission with a photoluminescence quantum efficiency (PLQE) of around 25% under ultraviolet (UV) light irradiation. Photophysical studies and density functional theory (DFT) calculations suggest the coexisting of delocalized free excitons and localized self-trapped excitons in metal halide nanoribbons leading to the dual emission. This work shows once again the exceptional tunability of organic metal halide hybrids that bridge between molecular systems with localized states and crystalline ones with electronic bands.
