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Energy Express

  • Editor: Christian Seassal
  • Vol. 22, Iss. S3 — May. 5, 2014
  • pp: A812–A817

GaN-based light-emitting diodes on graphene-coated flexible substrates

Gwangseok Yang, Younghun Jung, Camilo Vélez Cuervo, Fan Ren, Stephen J. Pearton, and Jihyun Kim  »View Author Affiliations

Optics Express, Vol. 22, Issue S3, pp. A812-A817 (2014)

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We demonstrate GaN-based thin light-emitting diodes (LEDs) on flexible polymer and paper substrates covered with chemical vapor deposited graphene as a transparent-conductive layer. Thin LEDs were fabricated by lifting the sapphire substrate off by Excimer laser heating, followed by transfer of the LEDs to the flexible substrates. These substrates were coated with tri-layer graphene by a wet transfer method. Optical and electrical properties of thin laser lift-offed LEDs on the flexible substrates were characterized under both relaxed and strained conditions. The graphene on paper substrates remained conducting when the graphene/paper structure was folded. The high transmittance, low sheet resistance and high failure strain of the graphene make it an ideal candidate as the transparent and conductive layer in flexible optoelectronics.

© 2014 Optical Society of America

OCIS Codes
(230.0230) Optical devices : Optical devices
(230.3670) Optical devices : Light-emitting diodes
(230.4000) Optical devices : Microstructure fabrication

ToC Category:
Light-Emitting Diodes

Original Manuscript: December 30, 2013
Revised Manuscript: March 27, 2014
Manuscript Accepted: March 28, 2014
Published: April 7, 2014

Gwangseok Yang, Younghun Jung, Camilo Vélez Cuervo, Fan Ren, Stephen J. Pearton, and Jihyun Kim, "GaN-based light-emitting diodes on graphene-coated flexible substrates," Opt. Express 22, A812-A817 (2014)

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