Optical and field emission properties of zinc oxide nanostructures

被引：18
|
作者：
Pan, H
Zhu, YW
Ni, ZH
Sun, H
Poh, C
Lim, SH
Sow, C
Shen, ZX
Feng, YP
Lin, JY
机构：
[1] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore
[2] Inst Chem & Engn Sci, Singapore 627833, Singapore
来源：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2005年 / 5卷 / 10期
关键词：
ZnO nanostructures; photoluminescence; field emission properties;
D O I：
10.1166/jnn.2005.183
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Zinc Oxide (ZnO) nano-pikes were produced by oxidative evaporation and condensation of Zn powders. The crystalline structure and optical properties of the ZnO nanostructures (ZnONs) greatly depend on the deposition position of the ZnONs. TEM and XRD indicated that the ZnONs close to the reactor center, ZnON-A, has better crystalline structure than the ZnONs away from the center, ZnON-B. ZnON-A showed the PL and Raman spectra characteristic of perfect ZnO crystals, whereas ZnON-B produced very strong green emission band at 500 nm in the photoluminescence (PL) spectrum and very strong Raman scattering peak at 560 cm(-1), both related to the oxygen deficiency due to insufficient oxidation of zinc vapor. ZnON-B exhibited better field emission properties with higher emission current density and lower turn-on field than ZnON-A.
引用
收藏
页码：1683 / 1687
页数：5
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