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Choi, Kyoung Jin
Energy Conversion Materials Lab.
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Metal/graphene sheets as p-type transparent conducting electrodes in GaN light emitting diodes

Author(s)
Lee, Jung MinJeong, Hae YongChoi, Kyoung JinIl Park, Won
Issued Date
2011-07
DOI
10.1063/1.3595941
URI
https://scholarworks.unist.ac.kr/handle/201301/7586
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=79961097975
Citation
APPLIED PHYSICS LETTERS, v.99, no.4, pp.1 - 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 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.
Publisher
AMER INST PHYSICS
ISSN
0003-6951

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