Influence of morphologies on the field emission performance of oriented ZnO nano-arrays

Different morphologies of comb-like ZnO and oriented ZnO nano-arrays such as ZnO nanoneedles and ZnO nanorods were synthesized by using flexible thermal evaporation method via simply adjusting the temperature and oxygen content. The ZnO nanorods arrays have the lowest turn-on field, highest current...

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Published inJournal of semiconductors Vol. 32; no. 12; pp. 44 - 47
Main Author 王灵婕 杨尊先 林金阳 郭太良
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.12.2011
Subjects
Current density
Morphology
Nanocomposites
Nanomaterials
Nanorods
Nanostructure
Semiconductors
Zinc oxide
ZnO
发射电流密度
取向
场发射性能
形态
氧化锌
纳米棒
纳米阵列
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Summary:Different morphologies of comb-like ZnO and oriented ZnO nano-arrays such as ZnO nanoneedles and ZnO nanorods were synthesized by using flexible thermal evaporation method via simply adjusting the temperature and oxygen content. The ZnO nanorods arrays have the lowest turn-on field, highest current density and the largest emission efficiency owning to its good contact with the substrate and relatively weaker field screening effects. The experiments show that the morphologies and orientation of one-dimensional （1D） ZnO nanomaterials have considerable effects on the turn-on field and the emission current density, and the nanoarray also contributes to electrons emission. The results could be valuable for the application of ZnO nanorod arrays as cathode materials in field emission based devices.
Bibliography:ZnO; oriented; nanorods; field emission; morphology
Wang Lingjie, Yang Zunxian, Lin Jinyang, and Guo Yailiang（1 College of Physics and Information Engineering, Fuzhou University, Fuzhou 350002, China 2Department of Mathematics and Physics, Xiamen University of Technology, Xiamen 361024, China）
11-5781/TN
Different morphologies of comb-like ZnO and oriented ZnO nano-arrays such as ZnO nanoneedles and ZnO nanorods were synthesized by using flexible thermal evaporation method via simply adjusting the temperature and oxygen content. The ZnO nanorods arrays have the lowest turn-on field, highest current density and the largest emission efficiency owning to its good contact with the substrate and relatively weaker field screening effects. The experiments show that the morphologies and orientation of one-dimensional （1D） ZnO nanomaterials have considerable effects on the turn-on field and the emission current density, and the nanoarray also contributes to electrons emission. The results could be valuable for the application of ZnO nanorod arrays as cathode materials in field emission based devices.
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ISSN:1674-4926
DOI:10.1088/1674-4926/32/12/123001