Mg-induced increase of band gap in Zn1-xMgxO nanorods revealed by x-ray absorption and emission spectroscopy

被引：24

作者：

Chiou, J. W. ^{[2
]}

Tsai, H. M. ^{[3
]}

Pao, C. W. ^{[3
]}

Chien, F. Z. ^{[3
]}

Pong, W. F. ^{[1
,3
]}

Chen, C. W. ^{[4
]}

Tsai, M. -H. ^{[5
]}

Wu, J. J. ^{[6
]}

Ko, C. H. ^{[6
]}

Chiang, H. H. ^{[6
]}

Lin, H. -J. ^{[7
]}

Lee, J. F. ^{[7
]}

Guo, J. -H. ^{[1
]}

机构：

[1] LBNL, Adv Light Source, Berkeley, CA 94720 USA

[2] Natl Univ Kaohsiung, Dept Appl Phys, Kaohsiung 811, Taiwan

[3] Tamkang Univ, Dept Phys, Tamsui 251, Taiwan

[4] Natl Taiwan Univ, Dept Mat Sci & Engn, Taipei 106, Taiwan

[5] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 804, Taiwan

[6] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan

[7] Natl Synchrotron Radiat Res Ctr, Hsinchu 300, Taiwan

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 104卷 / 01期

关键词：

D O I：

10.1063/1.2951939

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

X-ray absorption near-edge structure (XANES) and x-ray emission spectroscopy (XES) measurements were used to investigate the effect of Mg doping in ZnO nanorods. The intensities of the features in the O K-edge XANES spectra of Zn1-xMgxO nanorods are lower than those of pure ZnO nanorods, suggesting that Mg doping increases the negative effective charge of O ions. XES and XANES spectra of O 2p states indicate that Mg doping raises (lowers) the conduction-band-minimum (valence-band-maximum) and increases the band gap. The band gap is found to increase linearly with the Mg content, as revealed by photoluminescence and combined XANES and XES measurements. (c) 2008 American Institute of Physics.

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页数：4

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