Huang Yi-cong, Chen Fei-fei, Qiao Bei-jing, Dai Shi-xun, Xu Tie-feng, Nie Qiu-hua
Guang Pu Xue Yu Guang Pu Fen Xi. 2016 Oct;36(10):3163-8.
Two series of chalcogenide glasses in Ge-Sb-S ternary system were synthesized with melt-quenching method. The phycochemical properties and spectral characteristic of glasses with different content of Ge and Sb were obtained with a series of measurements, and the systematic analysis on the change of optical properties was conducted in terms of microstructure of glasses combined with the Raman spectra. With constraint theory based on mean coordination number (Z), we described the variation trend of network structure directly. It was found that as long as the value of Z reaches 2.6, new vibration peaks would be formed in the Raman spectra indicating the presence of threshold behavior as well as the change of the network structure of the Ge-Sb-S glasses which could be expressed in a specific varition in the number of metal bonds and the nonmetal bonds. The appearance of new functional groups in the network have changed the total bond energy of glasses, and then affected the energy band structure of glasses representing the corresponding threshold behavior of the value of optical band gap (Eopg).
采用熔融淬火法合成了Ge-Sb-S三元体系中的两系列硫属化物玻璃。通过一系列测量得到了不同Ge和Sb含量玻璃的物理化学性质和光谱特性，并结合拉曼光谱，从玻璃的微观结构角度对光学性质的变化进行了系统分析。基于平均配位数（Z）的约束理论，我们直接描述了网络结构的变化趋势。研究发现，只要Z值达到2.6，拉曼光谱中就会形成新的振动峰，这表明存在阈值行为，以及Ge-Sb-S玻璃网络结构的变化，这可以通过金属键和非金属键数量的特定变化来表示。网络中新官能团的出现改变了玻璃的总键能，进而影响了玻璃的能带结构，表现出相应的光学带隙（Eopg）值的阈值行为。
