Photocurrent, humidity sensitivity and proton conductivity properties of a new sulfide semiconductor CsCuS4,Dalton Transactions

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Photocurrent, humidity sensitivity and proton conductivity properties of a new sulfide semiconductor CsCuS4
Dalton Transactions ( IF 3.5 ) Pub Date : 2022-03-12 , DOI: 10.1039/d2dt00143h
Qiu-Nan Yan _{1,

2} , Bin-Wen Liu ₁ , Xiao-Ming Jiang ₁ , Jin-Xu Zhao _{1,

2} , Shao-Min Pei ₁ , Wen-Fa Chen ₁ , Guo-Cong Guo ₁

Affiliation

Copper chalcogenides have drawn considerable attention due to their prominent semiconducting properties. A new Cu-containing semiconductor, namely, CsCuS₄ (1), was obtained by a halide salt flux method. Its structure featured 1D infinite ^∞₁[CuS₄] ⁻ chains, where the polysulfide anion S₄²⁻ was relatively rare in Cu chalcogenides. The compound was multifunctional and exhibited significant photocurrent, humidity sensitivity, and proton conductivity properties. Specifically, it exhibits an “on” state photocurrent response of 0.95 μA cm⁻² and an “off” state photocurrent response of 0.55 μA cm⁻² with good reversibility. The humidity-sensitive resistance in dry air (10% RH) could reach up to six orders of magnitude higher than that in wet air (100% RH). Compound 1 showed an activation energy of 0.19 eV and may have potential electrochemical applications.

中文翻译：

新型硫化物半导体 CsCuS4 的光电流、湿度敏感性和质子传导特性

铜硫属化物由于其突出的半导体特性而引起了相当多的关注。通过卤化物盐熔剂法获得了一种新的含Cu半导体，即CsCuS ₄ ( 1 )。其结构特征为一维无限^∞₁ [CuS ₄ ] ^-链，其中多硫化物阴离子S ₄^2-在Cu 硫属化物中相对少见。该化合物是多功能的，并表现出显着的光电流、湿度敏感性和质子传导特性。具体来说，它表现出 0.95 μA cm ^-2的“开”状态光电流响应和 0.55 μA cm ^{-2的“关”状态光电流响应}具有良好的可逆性。干燥空气（10% RH）中的湿敏电阻比湿空气（100% RH）高六个数量级。化合物1的活化能为 0.19 eV，可能具有潜在的电化学应用。

更新日期：2022-03-12

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