文献类型：期刊文献

英文题名：Structural, Optical, and Improved Field-Emission Properties of Tetrapod-Shaped Sn-Doped ZnO Nanostructures Synthesized via Thermal Evaporation

作者：Zhou, Xiongtu[1];Lin, Tihang[1];Liu, Yuhui[1];Wu, Chaoxing[1];Zeng, Xiangyao[1];Jiang, Dong[2];Zhang, Yong-ai[1];Guo, Tailiang[1]

机构：[1]Fuzhou Univ, Coll Phys & Informat Engn, Fuzhou 350002, Peoples R China;[2]E China Univ Sci & Technol, Ctr Anal & Test, Shanghai 200237, Peoples R China

年份：2013

卷号：5

期号：20

起止页码：10067

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20134516949377);WOS:【SCI-EXPANDED(收录号:WOS:000326212900029)】；

基金：This work was financially supported by the Natural Science Foundation of China (no. 61306071), the Natural Science Foundation of Fujian Province, China (no. 2013J01236), and a grant from the Educational Commission of Fujian Province, China (no. JK2012001). The content of this work is the sole responsibility of the authors.

语种：英文

外文关键词：Sn-doped ZnO tetrapods; thermal evaporation; photoluminescence; field emission; enhancement factor

摘要：High-quality tetrapod-shaped Sn-doped ZnO (T-SZO) nanostructures have been successfully synthesized via the thermal evaporation of mixed Zn and Sn powder. The effects of the Sri dopant on the morphology, microstructure, optical, and field-emission (FE) properties of T-SZO were investigated. It was found that the growth direction of the legs of T-SZO is parallel to the [0001] crystal c-axis direction and that the incorporation of Sn in the ZnO matrix increases the aspect ratio of the tetrapods, leads to blue shift in the UV region, and considerably improves the FE performance. The results also show that tetrapod cathodes with around a 0.84 atom % Sn dosage have the best FE properties, with a turn-on field of 1.95 V/mu m, a current density of 950 mu A/cm(2) at a field of 4.5 V/mu m, and a field-enhancement factor as high as 9556.