Single crystalline ZnO radial homojunction light-emitting diodes fabricated by metalorganic chemical vapour deposition

Jinkyoung Yoo, Towfiq Ahmed, Wei Tang, Yong Jin Kim, Young Joon Hong, Chul-Ho Lee, Gyu Chul Yi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

ZnO radial p-n junction architecture has the potential for forward-leap of light-emitting diode (LED) technology in terms of higher efficacy and economical production. We report on ZnO radial p-n junction-based light emitting diodes prepared by full metalorganic chemical vapour deposition (MOCVD) with hydrogen-assisted p-type doping approach. The p-type ZnO(P) thin films were prepared by MOCVD with the precursors of dimethylzinc, tert-butanol, and tertiarybutylphosphine. Controlling the precursor flow for dopant results in the systematic change of doping concentration, Hall mobility, and electrical conductivity. Moreover, the approach of hydrogen-assisted phosphorous doping in ZnO expands the understanding of doping behaviour in ZnO. Ultraviolet and visible electroluminescence of ZnO radial p-n junction was demonstrated through a combination of position-controlled nano/microwire and crystalline p-type ZnO(P) radial shell growth on the wires. The reported research opens a pathway of realisation of production-compatible ZnO p-n junction LEDs.

Original languageEnglish
Article number394001
JournalNanotechnology
Volume28
Issue number39
DOIs
Publication statusPublished - 2017 Sep 5

Keywords

  • light-emitting diode
  • p-type
  • phosphorous
  • radial junction
  • ZnO

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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