Metal/graphene sheets as p-type transparent conducting electrodes in GaN light emitting diodes

Title
Metal/graphene sheets as p-type transparent conducting electrodes in GaN light emitting diodes
Authors
이정민정해용최경진박원일
Issue Date
2011-07
Publisher
Applied physics letters
Citation
VOL 99, NO 4, 041115-1-041115-3
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/45646
ISSN
0003-6951
Appears in Collections:
KIST Publication > Article
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