Reduced graphene oxide/single-walled carbon nanotube hybrid film using various p-type dopants and its application to gan-based light-emitting diodes

Byeong Ryong Lee, Tae Geun Kim

Research output: Contribution to journalArticle

Abstract

This paper reports the electrical and optical properties of the reduced graphene oxide (RGO)/singlewalled carbon nanotube (SWNT) films using various p-type dopants and its application to GaNbased light-emitting diodes. To enhance the current injection and spreading of the RGO/SWNT films on the light-emitting diodes (LEDs), we increased the work function (ℙ) of the films using chemical doping with AuCl3 , poly(3,4-ethylenedioxythiophene) oxidized with poly(4-styrenesulfonate) (PEDOT:PSS) and MoO3 ; thereby reduced the Schottky barrier height between the RGO/SWNT films and p-GaN. By comparison, LEDs fabricated with work-function-tuned RGO/SWNT film doped with MoO3 exhibited the decrease of the forward voltage from 5.3V to 5.02 V at 20 mA and the increase of the output power up to 1.26 times. We also analyzed the current injection mechanism using ultraviolet photoelectron spectroscopy and X-ray photoelectron spectroscopy.

Original languageEnglish
Pages (from-to)6203-6208
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume16
Issue number6
DOIs
Publication statusPublished - 2016 Jun 1

Keywords

  • AuCl
  • Dip-Coating methods.
  • MoO
  • P-GaN
  • PEDOT:PSS
  • RGO/SWNTs

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

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