期刊
APPLIED PHYSICS LETTERS
卷 99, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3595941
关键词
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资金
- Ministry of Education, Science and Technology [2010-0029300]
- MEST [K21002001635-10E0100-06310]
We demonstrate the use of graphene based transparent sheets as a p-type current spreading layer in GaN light emitting diodes (LEDs). Very thin Ni/Au was inserted between graphene and p-type GaN to reduce contact resistance, which reduced contact resistance from similar to 5.5 to similar to 0.6 Omega/ cm(2), with no critical optical loss. As a result, LEDs with metal-graphene provided current spreading and injection into the p-type GaN layer, enabling three times enhanced electroluminescent intensity compared with those with graphene alone. We confirmed very strong blue light emission in a large area of the metal-graphene layer by analyzing image brightness. (C) 2011 American Institute of Physics. [doi:10.1063/1.3595941]
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