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

Gaomin Song; Mingze Li; Yi Yang; Fei Liang; Qian Huang; Xiaomeng Liu; Pifu Gong; Zhiguo Xia; Zheshuai Lin

doi:10.1021/acs.jpclett.0c00096

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

J Phys Chem Lett. 2020 Mar 5;11(5):1808-1813. doi: 10.1021/acs.jpclett.0c00096. Epub 2020 Feb 20.

Authors

Gaomin Song^{1

2

3}, Mingze Li⁴, Yi Yang^{1

3}, Fei Liang^{1

3}, Qian Huang⁵, Xiaomeng Liu^{1

2

3}, Pifu Gong¹, Zhiguo Xia^{4

6}, Zheshuai Lin^{1

2

3}

Affiliations

¹ Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
² Center of Materials Science and Optoelectronics Engineering, University of the Chinese Academy of Sciences, Beijing 100049, China.
³ University of Chinese Academy of Sciences, Beijing 100190, China.
⁴ School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
⁵ Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 10090, China.
⁶ State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, China.

PMID: 32013451
DOI: 10.1021/acs.jpclett.0c00096

Abstract

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