Summary: | 碩士 === 國立東華大學 === 材料科學與工程學系 === 95 === In this study, a series Arsenic chalcogenides of As2(Se1-xTex)3 alloys, x=0、0.2、0.4、0.6、0.8、1.0, were grown by Vertical Brigaman method, direct quench and thermal evaporation method. The crystallinity and composition were investigated by X-Ray, SEM, Raman and EPMA. The energy band gaps of crystals were examined by transmission measurement. The composition dependence of crystallinity, band gaps for As2(Se1-xTex)3 were discussed. Finally, the values of energy band gap (Eg) of glassy alloys with various composition (x) can be fitted by an analytical expression, and the result is
Eg (x)=0.66x2+0.04x+0.82
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