Synthesis, Structure, and Photoelectric Properties of a Novel 0-Dimensional Organic–Inorganic Hybrid Perovskite (2-5-py)2MnBr4
Synthesis, Structure, and Photoelectric Properties of a Novel 0-Dimensional Organic–Inorganic Hybrid Perovskite (2-5-py)2MnBr4
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DOI：
10.1021/acs.jpcc.1c07221
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发表时间：
2021-10
期刊：
影响因子：
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通讯作者：
Jian He;Huining Zhao;Xinru Hu;Zhiyong Fang;Jilin Wang;Rui Zhang;Guoyuan Zheng;Bing Zhou
中科院分区：
文献类型：
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作者：
Jian He;Huining Zhao;Xinru Hu;Zhiyong Fang;Jilin Wang;Rui Zhang;Guoyuan Zheng;Bing Zhou
本研究以2-氨基-5-甲基吡啶（2-5-py）为有机配体，合成了一种新型的0维有机-无机杂化钙钛矿单晶（2-5-py） 2mnbr4。晶体为中心对称的p -1空间群，晶粒尺寸为20 mm，属于三斜晶系。它对紫光和蓝光有很强的吸收能力，并且具有优异的热稳定性。其光学带隙为2.38 eV，与密度泛函理论计算的理论带隙（2.39 eV）吻合较好。在合适的光源激发下，可发出526 nm的纯亮绿光，主峰证实其几乎在绿色范围内，全宽半峰为45 nm。结果表明，该材料的量子效率和荧光寿命分别达到44.2%和117 μs。基于晶体良好的荧光性能，最终成功制作出显色指数为97的白光LED，实现了从基础材料到光电器件的跨越。
In this study, a new type of 0-dimensional organic–inorganic hybrid perovskite single crystal (2-5-py)2MnBr4was synthesized using 2-amino-5-methylpyridine (2-5-py) as the organic ligand. The crystal is a center-symmetricP-1 space group with a grain size of 20 mm, which belongs to the triclinic crystal system. It has a strong absorption of violet and blue light as well as excellent thermal stability. Its optical band gap is 2.38 eV, which is in good agreement with the theoretical band gap (2.39 eV) calculated by density functional theory. Under the excitation of a suitable light source, it can emit 526 nm pure bright green lights, which are confirmed by the main peaks to be almost in the green range with a full width at half maximum of 45 nm. As a result, the quantum efficiency and fluorescence lifetime reached a high level of 44.2% and 117 μs, respectively. Based on the good fluorescence performance of the crystal, a white LED with a color rendering index of 97 was finally successfully fabricated, realizing the leap from basic materials to optoelectronic devices.