Metal/graphene sheets as p-type transparent conducting electrodes in GaN light emitting diodes
- Metal/graphene sheets as p-type transparent conducting electrodes in GaN light emitting diodes
- 이정민; 정해용; 최경진; 박원일
- Issue Date
- Applied physics letters
- VOL 99, NO 4, 041115-1-041115-3
- 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 ~5.5 to ~0.6Ω / ㎠,
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.
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