作者:A. A. Babaev、I. K. Kamilov、S. B. Sultanov、A. M. Askhabov、E. I. Terukov
DOI:10.1007/s10789-005-0207-9
日期:2005.7
The 77-K photoluminescence spectra of (As2S3)100 − x Aux and (As2S5)100 −x Aux (0 ≤ x ≤ 0.04) semiconducting glasses are measured for the first time. At low doping levels, the spectra of the (As2S5)100 − x Aux glasses are split into two components, one of which arises from the Au dopant. The temperature-dependent conductivity of the glasses shows two breaks at low Au concentrations and anomalous behavior in the range 300–360 K. Qualitative analysis of the conductivity data suggests that most of the impurity atoms have saturated valence bonds and form solid solutions with host atoms, changing the band gap of the material. A small fraction of the impurity atoms, those having unsaturated valence bonds, produce an electrically active level responsible for impurity conduction.
首次测量了 (As2S3)100 - x Aux 和 (As2S5)100 -x Aux (0 ≤ x ≤ 0.04) 半导体玻璃的 77-K 光致发光光谱。在低掺杂水平下,(As2S5)100 - x Aux 玻璃的光谱分为两部分,其中一部分来自金掺杂。玻璃随温度变化的电导率在低金浓度时出现两个断点,在 300-360 K 范围内出现异常行为。对电导率数据的定性分析表明,大部分杂质原子具有饱和价键,并与主原子形成固溶体,从而改变了材料的带隙。小部分杂质原子,即具有不饱和价键的杂质原子,会产生一个负责杂质传导的电活水平。