Lee Sujin, Karkee Rijan, Ben-Akacha Azza, Luong Derek, Vellore Winfred J S Raaj, Lin Xinsong, Strubbe David A, Ma Biwu
Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, 32306, USA.
Department of Physics, University of California, Merced, Merced, CA, 95343, USA.
Chem Commun (Camb). 2023 Mar 23;59(25):3711-3714. doi: 10.1039/d3cc00044c.
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, which contains metal halide nanoribbons with a width of three octahedral units. It is found that this material with a chemical formula CHNPbCl shows a dual emission with a photoluminescence quantum efficiency (PLQE) of around 25%. 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.
近年来，分子水平上具有低维结构的有机金属卤化物杂化物因其出色的结构可调性和独特的光物理性质而备受关注。在此，我们首次报道了一种一维（1D）有机金属卤化物杂化物的合成与表征，该杂化物包含宽度为三个八面体单元的金属卤化物纳米带。发现这种化学式为CHNPbCl的材料表现出双重发射，其光致发光量子效率（PLQE）约为25%。光物理研究和密度泛函理论（DFT）计算表明，金属卤化物纳米带中离域自由激子和局域自陷激子共存，导致了双重发射。
