Field emission properties of ion beam synthesized SiC/Si heterostructures by MEVVA implantation

被引:0
|
作者
Chen, DH [1 ]
Wong, SP [1 ]
Cheung, WY [1 ]
Luo, EZ [1 ]
Wu, W [1 ]
Xu, JB [1 ]
Wilson, IH [1 ]
Kwok, RWM [1 ]
机构
[1] Chinese Univ Hong Kong, Dept Elect Engn & Mat Sci, Shatin, Hong Kong
关键词
D O I
10.1557/PROC-509-199
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Planar SiC/Si heterostructures were formed by high dose carbon implantation using a metal vapor vacuum are ion source. The variations of the field emission properties with the implant dose and annealing conditions were studied. A remarkabIy low turn-on field of 1V/mu m was observed from a sample implanted at 35 keV to a dose of 1.0x10(18) cm(-2) with subsequent annealing in nitrogen at 1200 degrees C for 2h. The chemical composition depth profiles were determined from x-ray photoelectron spectroscopy and the surface morphology was observed by atomic force microscopy. The formation of a thin surface stoichiometric SiC layer and the formation of densely distributed small protrusions on the surface are believed to be the two factors responsible for the efficient electron field emission.
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收藏
页码:199 / 204
页数:6
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