纳米棒
材料科学
硼氢化钠
锌
工作职能
氧气
场电子发射
兴奋剂
共发射极
化学工程
基质(水族馆)
纳米技术
热液循环
光电子学
图层(电子)
电子
冶金
催化作用
有机化学
生物化学
量子力学
化学
物理
工程类
地质学
海洋学
作者
Xiaofeng Su,Jianbiao Chen,Ru-Mei He,Yan Li,Li Wang,Chengwei Wang
标识
DOI:10.1016/j.mssp.2017.05.012
摘要
Vertical and uniform zinc oxide (ZnO) nanorod arrays (NRAs) with sharp tips were fabricated on Zn substrate by a straightforward hydrothermal method without the assistance of seed layer, template or surfactant. Whereafter, the as-synthesized ZnO NRAs were successfully doped with oxygen vacancies by sodium borohydride (NaBH4) solution reduction, aiming to generate donor energy levels below the conduction band. More importantly, the doped concentration of oxygen vacancies could be effectively controlled by adjusting the reduction temperature, and we have ultimately achieved the purpose of controllable tailoring the energy band structure of ZnO NRAs. As with design, the oxygen-deficient ZnO NRAs present a lower turn-on field of 0.67 V/μm, higher field enhancement factor of 64601 and better field emission stability. Such excellent FE performance of the as-prepared emitter should originate from the optimization of geometry, the efficient electron transport, as well as the decreased work function.
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