Structural investigations of GeS2-Ga2S3-CdS chalcogenide glasses using Raman spectroscopy |
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Authors: | XF Wang JG Yu HZ Tao |
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Institution: | a Key Laboratory for Silicate Materials Science and Engineering (Wuhan University of Technology), Ministry of Education, Wuhan 430070, China b State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China |
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Abstract: | Raman investigations were carried out for various compositions of chalcogenide glasses in the GeS2-Ga2S3-CdS system. Addition of Ga2S3 into GeS2 results in the formation of metal-metal bonds and edge-shared GaS4/2 tetrahedra. Ge2+ ions may surround GaS4/2]1− tetrahedra acting as charge compensators. Upon the addition of CdS into the GeS2-Ga2S3 system, the number of the metal-metal bonds and edge-shared GaS4/2 tetrahedra decreases, resulting in the formation of corner-shared tetrahedra with non-bridging sulfurs (NBS). Cd2+ ions can be dissolved into the glass network as charge compensators for these NBS and exited few GaS4/2]1− tetrahedra. The high solubility of CdS is ascribed to the dissociation of metal-metal bonds and edge-shared tetrahedra in these Ga-containing glasses. |
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Keywords: | 42 70 Ce 42 70 Km 78 30 Fs |
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