A modified simplified coherent potential approximation model of band gap energy of III-V ternary alloys

查看全文 作　　者：Zhao [1,2]ChuanZhen;Zhang [1]Rong;Liu [1]Bin;Fu [1]DeYi;Li [1]Ming;Xiu [1]XiangQian;Xie [1]ZiLi;Zheng [1]YouDou

机构地区：[1]Nanjing Univ, Sch Elect Sci & Engn, Jiangsu Prov Key Lab Adv Photon & Elect Mat, Nanjing 210093, Jiangsu, Peoples R China;[2]Tianjin Polytech Univ, Sch Elect & Informat Engn, Tianjin 300160, Peoples R China;

出　　处：《Science China(Physics,Mechanics & Astronomy)》索引2012年第55卷第3期,共4页

基　　金：supported by the Special Funds for Major State Basic Research Project (Grant No. 2011CB301900);the National Natural Science Foundation of China (Grant No. 60990311) 摘　　要：Based on the modification of the simplified coherent potential approximation(SCPA),a model is developed to calculate the composition dependence of the band gap energy of III-V ternary alloys with the same anion.The derived equation is used to fit the experimental band gap energy of In x Al 1 x N,In x Ga 1 x N and Al x Ga 1 x N with x from 0 to 1.It is found that the fitting results are better than those done by using SCPA.The fitting results are also better than those obtained by using the formula with a small bowing coefficient,especially for In x Al 1 x N.In addition,our model can also be used to describe the composition dependence of band gap energy of other III-V ternary alloys. 关键词：相干势近似近似模型三元合金能量带隙离子组成公式拟合

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A modified simplified coherent potential approximation model of band gap energy of III-V ternary alloys

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