期刊
APPLIED PHYSICS LETTERS
卷 105, 期 13, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4897000
关键词
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资金
- 973 program [2012CB326407]
- National Natural Science Foundation of China (NSFC) [51372122, 51372123]
In this work, we reported the temperature-dependent field emission (FE) of flexible n-type SiC nanoneedles grown on the carbon fabric substrates via pyrolysis of polymeric precursor. The obtained n-type SiC nanoneedles with clear and sharp tips were incorporated by N dopants with a uniform spatial distribution. The FE behaviors of n-type SiC nanoneedles exhibit a strong dependence on the temperatures. Their turn-on fields and threshold fields decrease from 1.37 to 0.67 V/mu m and 1.87 to 0.96 V/mu m with the temperature raised from room temperature (RT) to 400 degrees C, respectively. The measured current emission stabilities of the n-type SiC nanoneedles under RT and 200 degrees C are similar to 7.7% and 14.1%, respectively. The temperature-dependent FE characteristics could be attributed to the reduction of the work function of n-type SiC nanoneedles induced by the raise of temperatures and the incorporated N dopants. (C) 2014 AIP Publishing LLC.
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