当前位置: 首页 > 文章 > 混合型位置Mg掺杂对ZnO晶体结构、电子结构和光学性质的影响 金陵科技学院学报 2015 (3) 40-44
Position: Home > Articles > The Influence of Mg-doping in Mix Positions on the Structural,Electrical and Optical Properties of ZnO Journal of Jinling Institute of Technology 2015 (3) 40-44

混合型位置Mg掺杂对ZnO晶体结构、电子结构和光学性质的影响

作  者:
胡永红;黄勇
单  位:
湖北科技学院核技术与化学生物学院;金陵科技学院公共基础课部
关键词:
ZnO;第一性原理计算;电子结构;光学性质;Mg掺杂
摘  要:
通过第一性原理计算,研究了混合型位置Mg掺杂对ZnO晶体结构、电子结构和光学性质的影响。缺陷形成能计算结果表明:混合型位置Mg掺杂ZnO是可能存在的。掺杂后晶格参数和晶胞体积都增大,但相对变化率不超过3%,即掺杂未导致相变。随着Mg浓度的增大,MgZnO的带隙呈现先减小后增大的趋势。对光学性质计算发现,MgZnO的吸收谱中有2个峰。结合态密度图,分析了这些峰对应的能级之间的跃迁。随着Mg浓度的增大,第一吸收峰的强度变化较显著。
译  名:
The Influence of Mg-doping in Mix Positions on the Structural,Electrical and Optical Properties of ZnO
作  者:
HU Yong-hong;HUANG Yong;Hubei University of Science and Technology;Jinling Institute of Technology;
关键词:
ZnO;;first-principles calculation;;electronic structure;;optical property;;Mg-doping
摘  要:
Based on the first principle calculations,the structural,electronic and optical properties of ZnO doped by Mg atoms in mix positions are studied.The calculation result about the defective formation energy indicates that the ZnO doped by Mg atoms in both substitutional and interstitial positions is possible.The lattice parameters and the volume of supercell of ZnO both increase after Mg doping,and these increases are all below 3%,indicating no phase transformation.The band gap of MgZnO first decreases and then increases with the increase of Mg content.Through optical calculations,the absorption spectrum is found to have two peaks.The corresponding transitions between different energy levels are studied with the calculation results of the density of states.The strength of the first absorption peak changes significantly with the increase of the Mg content.

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