JOURNAL ARTICLE

Raman spectroscopic analysis of GeS2-Ga2S3-PbI2 chalcohalide glasses

Haitao Guo, Haizheng Tao, Yanbo Zhai, Shun Mao, Xiujian Zhao
Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy 2007, 67 (5): 1351-6
17161648
The structures of pseudo-binary GeS2-PbI2, Ga2S3(GaS)-PbI2 and pseudo-ternary GeS2-Ga2S3-PbI2 chalcohalide systems were investigated by Raman scattering spectroscopy. By evolving the vibrational bands as a function of PbI2 content, it was verified that the effect of addition of PbI2 to the glass network is threefold, namely: (i) the conversion of GeS4 tetrahedra to GeS3I and GeS2I2 structural units, (ii) the destruction of ethane-like S3Ga(Ge)-(Ge)GaS3 structural units and formation of GaS3I and GeS3I ones and (iii) formation of short S-S chains and [PbIn] structural units when the concentration of PbI2 is high.

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