Aluminium doping induced enhancement of p-d coupling in ZnO
Data(s) |
2006
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Resumo |
Valence-band type Auger lines in Al doped and undoped ZnO were comparatively studied with the corresponding core level x-ray photoelectron spectrography (XPS) spectra as references. Then the shift trend of energy levels in the valence band was that p and p-s-d states move upwards but e and p-d states downwards with increasing Al concentration. The decreased energy of the Zn 3d state is larger than the increased energy of the 0 2p state, indicating the lowering of total energy. This may indicate that Al doping could induce the enhancement of p-d coupling in ZnO, which originates from stronger Al-O hybridization. The shifts of these states and the mechanism were confirmed by valence band XPS spectra and 0 K-edge x-ray absorption spectrography (XAS) spectra. Finally, some previously reported phenomena are explained based on the Al doping induced enhancement of p-d coupling. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Cong GW; Peng WQ; Wei HY; Liu XL; Wu JJ; Han XX; Zhu QS; Wang ZG; Ye ZZ; Lu JG; Zhu LP; Qian HJ; Su R; Hong CH; Zhong J; Ibrahim K; Hu TD .Aluminium doping induced enhancement of p-d coupling in ZnO ,JOURNAL OF PHYSICS-CONDENSED MATTER,2006,18(11):3081-3087 |
Palavras-Chave | #半导体材料 #ELECTRONIC-STRUCTURE CALCULATIONS #II-VI SEMICONDUCTORS #THIN-FILMS #PHOTOELECTRON-SPECTROSCOPY #DOPED ZNO #1ST-PRINCIPLES #CONDUCTION #STATES |
Tipo |
期刊论文 |