Synthesis, Structure, Band Gap, and Near-Infrared Photosensitivity of a New Chalcogenide Crystal, (NH4)4Ag12Sn7Se22

Ke Zhao Du, Xing Hui Qi, Mei Ling Feng, Jian Rong Li, Xing Zhi Wang, Cheng Feng Du, Guo Dong Zou, Meng Wang, Xiao Ying Huang

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

A new chalcogenide crystal, (NH4)4Ag12Sn7Se22 (FJSM-STS), has been solvothermally synthesized. The crystal structure, which is composed of arrays of [Sn3Se9]n6n- chains interconnecting [SnAg6Se10]n10n- and [Ag3Se4]n5n- layers, is unprecedented among the reported A/Ag/Sn/Q (A = cation; Q = S, Se, and Te) compounds. Optical absorption together with theoretical calculations of the band structure indicate a direct band gap of 1.21 eV for FJSM-STS, which is close to the ideal band gap to maximize the photoconversion efficiency proposed by Shockley and Queisser. The toxic-metal-free crystal of FJSM-STS exhibits obvious photosensitivity in the near-infrared range. The variates of power and temperature on the photosensitivity have been studied.

Original languageEnglish
Pages (from-to)5110-5112
Number of pages3
JournalInorganic Chemistry
Volume55
Issue number11
DOIs
StatePublished - 6 Jun 2016
Externally publishedYes

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