High-Performance Electron Field Emitters and Microplasma Cathodes Based on Conductive Hybrid Granular Structured Diamond Materials
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- 作者：Adhimoorthy SaravananBohr-Ran Huang ; Divinah Manoharan ; I-Nan Lin
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2017
- 出版时间：February 8, 2017
- 年：2017
- 卷：9
- 期：5
- 页码：4916-4925
- 全文大小：661K
- ISSN：1944-8252
文摘
High-performance diamond electron field emitters (EFEs) with extremely low turn-on field (E0 = 1.72 V/μm) and high current density (1.70 mA/cm2 at an applied field of 3.86 V/μm) were successfully synthesized by using a modified two-step microwave plasma chemical deposition process. Such emitters possess EFE properties comparable with most of carbon- or semiconductor-based EFE materials, but with markedly better lifetime stability. The superb EFE behavior of these materials was achieved owing to the reduction in the diamond-to-Si interfacial resistance and the increase in the conductivity of the bulk diamond films (HBD–400 V) via the applications of high bias voltage during the preparation of the ultrananocrystalline diamond (UNCD) primary layer and the subsequent plasma post-treatment (PPT) process, respectively. The superior EFE properties along with enhanced robustness of HBD–400 V films compared with the existing diamond-based EFE materials rendered these materials of greater potential for applications in high brightness display and multifunctional microplasma.