Lead-Free Tin(IV)-Based Organic-Inorganic Metal Halide Hybrids with Excellent Stability and Blue-Broadband Emission

作者：Song, Gaomin; Li, Mingze; Yang, Yi; Liang, Fei; Huang, Qian; Liu, Xiaomeng; Gong, Pifu^*; Xia, Zhiguo^*; Lin, Zheshuai^*

来源：Journal of Physical Chemistry Letters, 2020, 11(5): 1808-1813.

DOI：10.1021/acs.jpclett.0c00096

• WHITE-LIGHT EMISSION
• BROMIDE PEROVSKITES
• CRYSTAL-STRUCTURE
• THERMAL-ANALYSIS
• TIN BROMIDE
• PHOTOLUMINESCENCE
• DISTORTIONS

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 Sn4+ as the B-site inorganic cation and obtain a new tin(IV)-based organic-inorganic metal halide hybrids (C6N2H16Cl)(2)SnCl6 with remarkable air stability. (C6N2H16Cl)(2)SnCl6 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 (C6N2H16Cl)(2)SnCl6. This work presents a new strategy toward the tin(IV)-based photoluminescent organic-inorganic metal halide hybrids with environmentally friendly, high stability characteristics.

• 单位
  中国科学院; 中国科学院研究生院; 北京科技大学