Enhancement of light output power in ultraviolet light emitting diodes using graphene film on self-assembled Au nanocluster by agglomeration process

We applied graphene network on Au nanoclusters as a transparent and current spreading electrode in GaN-based ultraviolet (UV) light emitting diode (LED). The electroluminescence (EL) of UV-LEDs with graphene film on Au nanoclusters was enhanced by 10% at injection current of 20 mA, while keeping rea...

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Bibliographic Details
Published in:Journal of applied physics 2013-12, Vol.114 (22)
Main Authors: Seo, Tae Hoon, Shin, GangU, Kyoung Kim, Bo, Choi, Chel-Jong, Lee, Changhyup, Jong Kim, Myung, Suh, Eun-Kyung
Format: Article
Language:English
Subjects:
Applied physics
Contact resistance
Current voltage characteristics
Diodes
Electroluminescence
Gallium nitrides
Gold
Graphene
Injection current
Nanoclusters
Organic light emitting diodes
Self-assembly
Spreading
Texturing
Ultraviolet radiation
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Summary:We applied graphene network on Au nanoclusters as a transparent and current spreading electrode in GaN-based ultraviolet (UV) light emitting diode (LED). The electroluminescence (EL) of UV-LEDs with graphene film on Au nanoclusters was enhanced by 10% at injection current of 20 mA, while keeping reasonably good injected current-voltage (I-V) characteristics. This result is attributed to the reduction of absorption at UV wavelength region, effective current spreading and injection by reduced sheet and contact resistance, and texturing effect through Au nanocluster.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4836835