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Li-Free ternary sulphide Cs5Ga9S16 with excellent nonlinear optical performance similar to classic LiGaS2

The element with the strongest electropositivity, Cs, was introduced into an anionic framework [Ga9S16]5− constructed from GaS4 tetrahedra, which are functional nonlinear optical motifs, to acquire the ternary noncentrosymmetric sulphide Cs5Ga9S16 through solid-state reaction in a silica tube. Simil...

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Bibliographic Details
Published in:Inorganic chemistry frontiers 2022-09, Vol.9 (18), p.4624-4631
Main Authors: Jin-Xu, Zhao, Xiao-Ming, Jiang, Wen-Fa Chen, Shao-Min, Pei, Bin-Wen, Liu, Guo-Cong, Guo
Format: Article
Language:English
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Summary:The element with the strongest electropositivity, Cs, was introduced into an anionic framework [Ga9S16]5− constructed from GaS4 tetrahedra, which are functional nonlinear optical motifs, to acquire the ternary noncentrosymmetric sulphide Cs5Ga9S16 through solid-state reaction in a silica tube. Similar to classic LiGaS2, the three-dimensional phase Cs5Ga9S16 displayed prominent nonlinear optical performance, such as second-harmonic generation intensity (equal to LiGaS2) with phase-matching behaviour under incident laser irradiation at 1064 and 1910 nm, a wide band gap (3.81 eV) for a high laser-induced damage threshold (equal to LiGaS2@1064 nm), and broad infrared transmittance transparency. Importantly, the Li-free Cs5Ga9S16 avoided the problem of corrosiveness to silica tubes at high temperatures similar to LiGaS2, suggesting that Cs5Ga9S16 could be a promising candidate for infrared nonlinear optical applications.
ISSN:2052-1545
2052-1553
DOI:10.1039/d2qi01074g