节点文献
S掺杂CuInSe2导致的体积变化对其禁带宽度的影响(英文)
Impact of Lattice Volume on the Band Gap Broadening of Isovalent S-Doped CuInSe2
【摘要】 运用第一性原理方法研究了CuInSe2和不同量的S掺杂CuInSe2所形成的化合物的电子结构.理论计算表明,S掺杂导致CuInSe2禁带宽度增大,且通过对其电子结构和键长的分析,发现因S掺杂浓度的增加而导致的CuInSeS化合物晶格体积减小对其禁带宽度的增加有重要的影响.
【Abstract】 The electronic structure of pure and S-doped chalcopyrite CuInSe2 is investigated using a first-principles pseudopotential method in the generalized gradient approximation.The calculation indicates that the band gap of CuInSe2 broadens as S-doping concentration increases.We find that the decreased lattice volume due to isovalent S-doping in CuInSe2 has a significant impact on the band gap broadening phenomena.This physical insight is further discussed with the study of the electronic structure and bond length changes.
【基金】 华南理工大学高性能计算中心资助项目~~
- 【文献出处】 半导体学报 ,Journal of Semiconductors , 编辑部邮箱 ,2008年10期
- 【分类号】TN304
- 【被引频次】8
- 【下载频次】212