Determination of the microstructure of Eu-treated ZnO nanowires by x-ray absorption

被引：11

作者：

Huang, W. L. ^{[1
]}

Labis, J. ^{[1
,9
]}

Ray, S. C. ^{[1
,2
]}

Liang, Y. R. ^{[1
]}

Pao, C. W. ^{[1
]}

Tsai, H. M. ^{[1
]}

Du, C. H. ^{[1
]}

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

Chiou, J. W. ^{[3
]}

Tsai, M. -H. ^{[4
]}

Lin, H. J. ^{[5
]}

Lee, J. F. ^{[5
]}

Chou, Y. T. ^{[6
]}

Shen, J. L. ^{[6
]}

Chen, C. W. ^{[7
]}

Chi, G. C. ^{[8
]}

机构：

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

[2] Univ Witwatersrand, Sch Phys, ZA-2050 Wits, Johannesburg, South Africa

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

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

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

[6] Chung Yuan Christian Univ, Dept Phys, Chungli 320, Taiwan

[7] Natl Cent Univ, Dept Phys, Chungli 320, Taiwan

[8] Natl Chiao Tung Univ, Dept Photon, Hsinchu 300, Taiwan

[9] MSU, Coll Sci, Dept Phys, Gen Santos City, Philippines

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 06期

关键词：

europium; EXAFS; II-VI semiconductors; nanowires; photoluminescence; thermal conductivity; wide band gap semiconductors; XANES; zinc compounds; ROOM-TEMPERATURE; LUMINESCENCE;

D O I：

10.1063/1.3304071

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), extended x-ray absorption fine structures (EXAFS), and photoluminescence measurements were used to elucidate the microstructural and photoluminescence properties of ZnO nanowires (ZnO-NWs) that had been treated with Eu by thermal diffusion. The O K- and Eu L-3-edge XANES and EXAFS spectra at the Zn K- and Eu L-3-edge verified the formation of Eu2O3-like layer on the surface of ZnO-NWs. X-ray diffraction, XANES and EXAFS measurements consistently suggest the lack of substitutional doping of Eu ions at the Zn ion sites in the interior of ZnO-NWs. The clear sharp and intense emission bands in the range 610-630 nm of Eu-treated ZnO-NWs originated from the intra-4f transition of Eu ions in the Eu2O3-like surface layer.

引用

页数：3

共 20 条

[1] Generating blue and red luminescence from ZnO/poly(ethylene glycol) nanocomposites prepared using an in-situ method [J].