Theoretical understanding on band engineering of Mn-doped lead chalcogenides PbX (X = Te, Se, S)
Theoretical understanding on band engineering of Mn-doped lead chalcogenides PbX (X = Te, Se, S)
复制标题
锰掺杂铅硫族化物PbX (X = Te, Se, S)能带工程的理论认识
DOI:
10.1088/0953-8984/27/9/095501
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发表时间:
2015-02
影响因子:
2.7
通讯作者:
Ren Shang-Fen
中科院分区:
文献类型:
--
作者:
Tan Xiaojian;Shao Hezhu;Hu Tianqi;Liu Guo-Qiang;Ren Shang-Fen
Electronic structures of Mn-doped PbX (X = Te, Se, S) are investigated by first-principles calculations. It is found that the Mn-doping in PbTe enlarges the band gap and increases the valence bands degeneracy, showing good agreement with experimental measurements. This band adjustment is demonstrated to be from the anti-bonding of Te-p and Mn-d orbitals. Along the series of PbTe-PbSe-PbS, the band modification of Mn-doping undergoes a gradual transition from multiple valence bands type to resonant states type, owing to the downwards shifted anion-p orbitals. This work provides essential understandings on the band engineering of Mn-doped lead chalcogenides thermoelectric materials.
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