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

被引：10

作者：

Du, Ke-Zhao ^{[1
]}

Qi, Xing-Hui ^{[1
,2
]}

Feng, Mei-Ling ^{[1
]}

Li, Jian-Rong ^{[1
]}

Wang, Xing-Zhi ^{[4
]}

Du, Cheng-Feng ^{[1
,3
]}

Zou, Guo-Dong ^{[1
]}

Wang, Meng ^{[1
]}

Huang, Xiao-Ying ^{[1
]}

机构：

[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China

[2] Fuzhou Univ, Coll Chem & Chem Engn, Fuzhou 350002, Fujian, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore

来源：

INORGANIC CHEMISTRY | 2016年 / 55卷 / 11期

关键词：

SOLVOTHERMAL SYNTHESIS; OPTICAL-PROPERTIES; SOLAR-CELLS; SULFIDE; THIOSTANNATE; EFFICIENCY; DETECTORS; GERMANIUM; CHAINS; LAYERS;

D O I：

10.1021/acs.inorgchem.6b00803

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A new chalcogenide crystal, (NH4)(4)Ag12Sn7Se22 (FJSM-STS), has been solvothermally synthesized. The crystal structure, which is composed of arrays of [Sn3Se9](n)(6n-) chains interconnecting [SnAg6Se10](n)(10n-) and [Ag3Se4](n)(5n-) 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.

引用

页码：5110 / 5112

页数：3

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