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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 23 — Nov. 18, 2013
  • pp: 29025–29030

GaN-based ultraviolet light-emitting diodes with AuCl3-doped graphene electrodes

Byung-Jae Kim, Gwangseok Yang, Hong-Yeol Kim, Kwang Hyeon Baik, Michael A. Mastro, Jennifer K. Hite, Charles R. Eddy, Jr., Fan Ren, Stephen J. Pearton, and Jihyun Kim  »View Author Affiliations

Optics Express, Vol. 21, Issue 23, pp. 29025-29030 (2013)

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We demonstrate AuCl3-doped graphene transparent conductive electrodes integrated in GaN-based ultraviolet (UV) light-emitting diodes (LEDs) with an emission peak of 363 nm. AuCl3 doping was accomplished by dipping the graphene electrodes in 5, 10 and 20 mM concentrations of AuCl3 solutions. The effects of AuCl3 doping on graphene electrodes were investigated by current-voltage characteristics, sheet resistance, scanning electron microscope, optical transmittance, micro-Raman scattering and electroluminescence images. The optical transmittance was decreased with increasing the AuCl3 concentrations. However, the forward currents of UV LEDs with p-doped (5, 10 and 20 mM of AuCl3 solutions) graphene transparent conductive electrodes at a forward bias of 8 V were increased by ~48, 63 and 73%, respectively, which can be attributed to the reduction of sheet resistance and the increase of work function of the graphene. The performance of UV LEDs was drastically improved by AuCl3 doping of graphene transparent conductive electrodes.

© 2013 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:
Optical Devices

Original Manuscript: August 16, 2013
Manuscript Accepted: November 1, 2013
Published: November 15, 2013

Byung-Jae Kim, Gwangseok Yang, Hong-Yeol Kim, Kwang Hyeon Baik, Michael A. Mastro, Jennifer K. Hite, Charles R. Eddy, Fan Ren, Stephen J. Pearton, and Jihyun Kim, "GaN-based ultraviolet light-emitting diodes with AuCl3-doped graphene electrodes," Opt. Express 21, 29025-29030 (2013)

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