Issue 22, 2022

Interesting dimensional transition through changing cations as the trigger in multinary thioarsenates displaying variable photocurrent response and optical anisotropy

Abstract

Due to the intriguing component variability and structure–property flexibility, lone-pair cation-based chalcogenides have garnered substantial interest in recent years. Herein, two new multinary thioarsenates, Cs2ZnAs4S8 and [(NH4)Cs]CdAs4S8, were successfully discovered via a surfactant–thermal reaction. Both of them possess identical stoichiometry 2–1–4–8, but they exhibit surprisingly different structural features. Cs2ZnAs4S8 demonstrates a three-dimensional (3D) [ZnAs4S8]2− framework made from the corner-sharing [ZnS4] tetrahedra and one-dimensional (1D) [As4S8]4− chains, whereas [(NH4)Cs]CdAs4S8 exhibits a two-dimensional (2D) [CdAs4S8]2− layer constructed from the corner-sharing [CdS4] tetrahedra and tetranuclear [As4S8] clusters. Photoelectric measurements display that Cs2ZnAs4S8 has higher photogenerated electron–hole pair separation efficiency than [(NH4)Cs]CdAs4S8 under visible light irradiation. Moreover, both of them show large optical anisotropy (Δn > 0.17 at 1064 and 2050 nm), while the low dimensional structure is more conducive to enhancing the optical anisotropy based on the theoretical calculations. These findings will provide inspiration for the exploration of multifunctional chalcogenides.

Graphical abstract: Interesting dimensional transition through changing cations as the trigger in multinary thioarsenates displaying variable photocurrent response and optical anisotropy

Supplementary files

Article information

Article type
Research Article
Submitted
04 aug 2022
Accepted
19 sep 2022
First published
20 sep 2022

Inorg. Chem. Front., 2022,9, 5820-5827

Interesting dimensional transition through changing cations as the trigger in multinary thioarsenates displaying variable photocurrent response and optical anisotropy

C. Zhang, S. Zhou, Y. Xiao, H. Lin and Y. Liu, Inorg. Chem. Front., 2022, 9, 5820 DOI: 10.1039/D2QI01694J

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