Improved field emission properties of Au nanoparticles and CNTs decorated SnO2 nanowire arrays on carbon fibers

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• 作者：L. A. Ma ; Z. H. Wei ; T. L. Guo
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：27
• 期：9
• 页码：9044-9051
• 全文大小：2,218 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1573-482X
• 卷排序：27

文摘

We have developed a simple and effective method to improve field emission (FE) performance of SnO₂ nanowire arrays (SnO₂ NWs) decorated with low-cost CNTs and conducting Au nanoparticles. SnO₂ NWs was grown on carbon fibers (CF) using Au-assisted vapor liquid solid method. CNT and Au nanoparticle decoration of SnO₂ NWs was obtained by subsequent decoration via spray-coating and sputtering deposition process. Compared with the as-prepared SnO₂ and CNT/SnO₂, Au/CNT/SnO₂ composite emitters have exhibited predominant FE characteristics with low turn-on field (0.72 V/μm), high field enhancement factor (~5726), and good stability. The FE enhancement was attributed to highly conducted Au nanoparticles and CNTs with sharp tips densely distributed on the surface of SnO₂ NWs, which can effectively increase emission site density, favor electron transfer and quickly transmit heat from the emitters to substrate. Our results revealed that Au/CNT/SnO₂ composite with excellent FE performance grown on CF can provide the possibility of application in flexible flat panel displays.