Undoped p-type ZnO nanorods synthesized by a hydrothermal method

Yak Fan Hsu, Yan Yan Xi, Kai Hang Tam, Aleksandra B. Djurišić, Jiaming Luo, Chi Chung Ling, Chor Keung Cheung, Alan Man Ching Ng, Wai Kin Chan, Xin Deng, Christopher D. Beling, Stevenson Fung, Kok Wai Cheah, Patrick Wai Keung Fong, Charles C. Surya

Research output: Contribution to journalArticlepeer-review

96 Citations (Scopus)

Abstract

Zinc oxide is a very promising material for short-wavelength light-emitting devices due to its large band gap and high exciton binding energy. Although great progress has been made in recent years, p-type doping and control over native defects introduced during or after material growth are still significant problems that hinder the development of efficient ZnO based optoelectronic devices. Here we demonstrate a versatile method for the growth or p-type or n-type ZnO nanorods from the same growth solution at temperature as low as 90 °C, where the conductivity type is controlled by the preparation of the seed layer for nanorod growth. The differences in the conductivity type can be attributed to dependency of native defect concentrations and hydrogen incorporation on the seed layer preparation method. Room temperature electroluminescence has been demonstrated from homojunction and heterojunction light emitting diodes containing p-ZnO nanorods.

Original languageEnglish
Pages (from-to)1020-1030
Number of pages11
JournalAdvanced Functional Materials
Volume18
Issue number7
DOIs
Publication statusPublished - Apr 11 2008
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Condensed Matter Physics
  • Electrochemistry

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