Song Gaomin, Li Mingze, Yang Yi, Liang Fei, Huang Qian, Liu Xiaomeng, Gong Pifu, Xia Zhiguo, Lin Zheshuai
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Center of Materials Science and Optoelectronics Engineering, University of the Chinese Academy of Sciences, Beijing 100049, China.
J Phys Chem Lett. 2020 Mar 5;11(5):1808-1813. doi: 10.1021/acs.jpclett.0c00096. Epub 2020 Feb 20.
Lead-free zero-dimensional (0D) organic-inorganic metal halide hybrids have recently attracted special attention as luminescent materials. However, their structural stability is still a challenge for the further development. Here, we select Sn as the B-site inorganic cation and obtain a new tin(IV)-based organic-inorganic metal halide hybrids (CNHCl)SnCl with remarkable air stability. (CNHCl)SnCl exhibits a blue broadband emission originating from self-trapping excitons (STEs) and the emission intensity remains stable for over three months. When the temperature rises to 450 K, the intensity of photoluminescence can maintain about 50%, indicating the good thermal stability of (CNHCl)SnCl. This work presents a new strategy toward the tin(IV)-based photoluminescent organic-inorganic metal halide hybrids with environmentally friendly, high stability characteristics.
无铅零维（0D）有机-无机金属卤化物杂化物最近作为发光材料受到了特别关注。然而，它们的结构稳定性仍然是进一步发展的一个挑战。在此，我们选择锡作为B位无机阳离子，获得了一种具有显著空气稳定性的新型基于锡（IV）的有机-无机金属卤化物杂化物（CNHCl）SnCl。（CNHCl）SnCl表现出源自自陷激子（STE）的蓝色宽带发射，并且发射强度在三个多月内保持稳定。当温度升至450 K时，光致发光强度可维持约50%，表明（CNHCl）SnCl具有良好的热稳定性。这项工作为具有环境友好、高稳定性特征的基于锡（IV）的光致发光有机-无机金属卤化物杂化物提出了一种新策略。
