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首页> 外文期刊>Journal of Materials Research >Composition and temperature dependence of optical energy gaps of TlGa_(1-x)Sb_xS_2 single crystals
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Composition and temperature dependence of optical energy gaps of TlGa_(1-x)Sb_xS_2 single crystals

机译:TlGa_(1-x)Sb_xS_2单晶的能隙组成及温度依赖性

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摘要

TlGa_(1-x)Sb_xS_2 (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) single crystals were grown using the Bridgman―Stockbarger method. The direct energy gaps of the single crystals were found to be 2.586, 2.459, 2.344, 2.228, 2.119, and 1.987 eV for the composition x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0, respectively, at 20 K. The indirect energy gaps were found to be 2.479, 2.357, 2.232, 2.118, 1.983, and 1.871 eV for the composition x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0, respectively, at 20 K. The optical energy gaps decreased linearly with increasing composition x. The temperature dependence of the optical energy gaps for each of the single crystals was well fitted with the Varshni equation.
机译:使用Bridgman-Stockbarger方法生长TlGa_(1-x)Sb_xS_2(x = 0.0、0.2、0.4、0.6、0.8、1.0)单晶。发现在20 K下,组成x分别为= 0.0、0.2、0.4、0.6、0.8和1.0时,单晶的直接能隙为2.586、2.459、2.344、2.228、2.119和1.987 eV。发现在20 K时组成x = 0.0、0.2、0.4、0.6、0.8和1.0的间接能隙分别为2.479、2.357、2.232、2.118、1.983和1.871 eV。光能隙线性减小随着成分x的增加。每个单晶的光能隙的温度依赖性与Varshni方程完全吻合。

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