We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
A Study on the Field Emission Characteristics of High-Quality Wrinkled Multilayer Graphene Cathodes.
- Authors
Lv, Wenmei; Wang, Lian; Lu, Yiwei; Wang, Dong; Wang, Hui; Hao, Yuxin; Zhang, Yuanpeng; Sun, Zeqi; Tang, Yongliang
- Abstract
Field emission (FE) necessitates cathode materials with low work function and high thermal and electrical conductivity and stability. To meet these requirements, we developed FE cathodes based on high-quality wrinkled multilayer graphene (MLG) prepared using the bubble-assisted chemical vapor deposition (B-CVD) method and investigated their emission characteristics. The result showed that MLG cathodes prepared using the spin-coating method exhibited a high field emission current density (~7.9 mA/cm2), indicating the excellent intrinsic emission performance of the MLG. However, the weak adhesion between the MLG and the substrate led to the poor stability of the cathode. Screen printing was employed to prepare the cathode to improve stability, and the influence of a silver buffer layer was explored on the cathode's performance. The results demonstrated that these cathodes exhibited better emission stability, and the silver buffer layer further enhanced the comprehensive field emission performance. The optimized cathode possesses low turn-on field strength (~1.5 V/μm), low threshold field strength (~2.65 V/μm), high current density (~10.5 mA/cm2), and good emission uniformity. Moreover, the cathode also exhibits excellent emission stability, with a current fluctuation of only 6.28% during a 4-h test at 1530 V.
- Subjects
FIELD emission; CATHODES; ELECTRIC conductivity; CHEMICAL vapor deposition; WRINKLE patterns; CURRENT fluctuations
- Publication
Nanomaterials (2079-4991), 2024, Vol 14, Issue 7, p613
- ISSN
2079-4991
- Publication type
Article
- DOI
10.3390/nano14070613