Transparent conductive graphene electrode in GaN-based ultra-violet light emitting diodes

Byung Jae Kim, Michael A. Mastro, Jennifer Hite, Charles R. Eddy, Jihyun Kim

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)


We report a graphene-based transparent conductive electrode for use in ultraviolet (UV) GaN light emitting diodes (LEDs). A few-layer graphene (FLG) layer was mechanically deposited. UV light at a peak wavelength of 368nm was successfully emitted by the FLG layer as transparent contact to p-GaN. The emission of UV light through the thin graphene layer was brighter than through the thick graphene layer. The thickness of the graphene layer was characterized by micro-Raman spectroscopy. Our results indicate that this novel graphene-based transparent conductive electrode holds great promise for use in UV optoelectronics for which conventional ITO is less transparent than graphene.

Original languageEnglish
Pages (from-to)23030-23034
Number of pages5
JournalOptics Express
Issue number22
Publication statusPublished - 2010 Oct 25

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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