Field emission and photofluorescent characteristics of zinc oxide nanowires synthesized by a metal catalyzed vapor-liquid-solid process

被引:179
作者
Li, SY
Lin, P
Lee, CY
Tseng, TY [1 ]
机构
[1] Natl Chiao Tung Univ, Dept Elect Engn, Hsinchu 30050, Taiwan
[2] Natl Chiao Tung Univ, Inst Mat Sci & Engn, Hsinchu 30049, Taiwan
[3] Natl Chiao Tung Univ, Inst Elect, Hsinchu 30050, Taiwan
关键词
D O I
10.1063/1.1655685
中图分类号
O59 [应用物理学];
学科分类号
摘要
The ZnO nanowires synthesized by vapor-liquid-solid growth mechanism with Cu and Au as the catalyst were investigated. The principal differences in morphology between Cu and Au catalyzed ZnO nanowires are observed and lead to significant differences in their field emission and photofluorescent characteristics. The Cu catalyzed ZnO nanowires with a high-quality wurtzite structure were grown vertically on p-type Si(100) substrate along [0002] direction. A strong ultraviolet emission at 381 nm is observed. These ZnO nanowires show excellent field emission properties with turn-on field of 0.83 V/mum and corresponding current density of 25 muA/cm(2). The emitted current density of the ZnO nanowires is 1.52 mA/cm(2) at a bias field of 8.5 V/mum. The large field emission area factor, beta arising from the morphology of the nanowire field emitter, is partly responsible for the good emission characteristics. The ZnO nanowires with high emission current density and low turn-on field are expected to be used in field emission flat panel display. (C) 2004 American Institute of Physics.
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页码:3711 / 3716
页数:6
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