Issue 15, 2022

Antimony doping to enhance luminescence of tin(iv)-based hybrid metal halides

Abstract

Lead-based organic–inorganic metal halides (OIMHs) have recently attracted special attention due to their efficient broadband photoluminescence. However, the toxicity of lead poses a challenge for their further development. Here, we selected Sn(IV) as the metal center to synthesize the environmentally friendly and stable luminescent OIMHs (C9H15N3)2SnCl8 and (C9H15N3)2SnBr8 (C9H13N3 is 1-(2-pyridyl)piperazine). Both compounds possess zero-dimensional structures, crystallizing in the monoclinic space group P21/c, and their optical band gaps were experimentally determined to be 3.19 and 2.60 eV, respectively. Under UV excitation at room temperature, (C9H15N3)2SnCl8 exhibited double-peak emissions centered at 405 and 688 nm, which were attributed to the organic cation and inorganic octahedra, respectively. Upon introducing 5s2-lone-pair-containing Sb3+ in (C9H15N3)2SnCl8, self-trapped emission was promoted, and the photoluminescence quantum yield increased from ∼1% to ∼17.84%. This work suggests effective strategies for finding environmentally friendly stable OIMHs and for further enhancing the luminescence properties through lone-pair-containing cation doping.

Graphical abstract: Antimony doping to enhance luminescence of tin(iv)-based hybrid metal halides

Supplementary files

Article information

Article type
Research Article
Submitted
25 Apr 2022
Accepted
15 Jun 2022
First published
23 Jun 2022

Inorg. Chem. Front., 2022,9, 3865-3873

Author version available

Antimony doping to enhance luminescence of tin(IV)-based hybrid metal halides

K. Liu, S. Hao, J. Cao, J. Lin, L. Fan, X. Zhang, Z. Guo, C. Wolverton, J. Zhao and Q. Liu, Inorg. Chem. Front., 2022, 9, 3865 DOI: 10.1039/D2QI00884J

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