Structural and optical properties of nanophase zinc oxide

被引:161
作者
Du, Y
Zhang, MS [1 ]
Hong, J
Shen, Y
Chen, Q
Yin, Z
机构
[1] Nanjing Univ, Natl Lab Solid State Microstruct, Dept Phys, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Ctr Mat Anal, Nanjing 210093, Peoples R China
来源
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2003年 / 76卷 / 02期
关键词
D O I
10.1007/s003390201404
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Nanophase zinc oxide samples were synthesized by a two-step solid-state reaction method. The phase structure and microstructure were investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The vibrational Raman spectra were compared with those from the bulk and their grain size dependence was also examined. Their photoelectric behavior was studied by X-ray photoelectron spectroscopy (XPS). The peaks at 1044.5 and 1021.4 eV were recorded as corresponding to the respective binding energies of Zn2p(1/2) and Zn 2p(3/2), and the photoelectron spectrum of O1s in the as-prepared powder was located at 531.2 eV. A strong visible emission centered at 580 nm was clearly observed in the nanosized zinc oxide at room temperature. Photoluminescence (PL) spectra were investigated as a function of grain size after different heat treatments. The origin of the luminescence is attributed to the recombination of electrons in singly occupied oxygen vacancies with photoexcited holes in the valence band.
引用
收藏
页码:171 / 176
页数:6
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