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Temperature Dependence of Energy Gap and Thermodynamic Function Properties of Undoped and Co-doped $Cd_{4}GeSe_{6}$ Sing1e Crystals by Chemical Transport Reaction Method  

Kim, Nam-Oh (조선이공대학 전기과)
Kim, Hyung-Gon (조선이공대학 전기과)
Kim, Duck-Tae (동아인재대학 자동차환경레이저과)
Hyun, Seung-Cheol (성화대학 전기과)
Oh, Gum-Kon (조선대학교 전기과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers C / v.52, no.2, 2003 , pp. 85-90 More about this Journal
Abstract
In this work $Cd_{4}GeSe_{6}$ and $Cd_{4}GeSe_{6}$ : $Co^{2+}$ single crystals were grown by the chemical transport reaction method and the structure of $Cd_{4}GeSe_{6}$ and $Cd_{4}GeSe_{6}$ : $Co^{2+}$ single crystals were monoclinic structure. The temperature dependence of optical energy 9ap was fitted well to Varshni equation. Also, the entropy, enthalpy and heat capacity were deduced from the temperature dependence of optical energy gap.
Keywords
entropy; enthalpy; heat capacity; optical energy gap; Varshni equation;
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