Persistent photoconductivity in ZnO nanostructures induced by surface oxygen vacancy

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Z. G. Yin
  • X. W. Zhang
  • Z. Fu
  • X. L. Yang
  • J. L. Wu
  • G. S. Wu
  • L. Gong

Detail(s)

Original languageEnglish
Pages (from-to)117-119
Journal / PublicationPhysica Status Solidi - Rapid Research Letters
Volume6
Issue number3
Publication statusPublished - Mar 2012

Abstract

ZnO nanowall networks grown on SiO 2/Si substrate were found to exhibit persistent photoconductivity (PPC). The relaxation rate of the persistent photocurrent is enhanced by a higher oxygen level in the ambient suggesting that PPC is closely related to the ZnO surface. Surface modification with hydrogen peroxide can significantly reduce the PPC relaxation time, implying that surface oxygen deficiency is responsible for the effect. The transition between the neutral and the metastable singly ionized states of the surface oxygen vacancy is suggested to account for the phenomenon and it is supported by the temperature and wavelength dependence of the PPC. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Research Area(s)

  • Nanostructures, Photoconductivity, Vacancies, ZnO

Citation Format(s)

Persistent photoconductivity in ZnO nanostructures induced by surface oxygen vacancy. / Yin, Z. G.; Zhang, X. W.; Fu, Z.; Yang, X. L.; Wu, J. L.; Wu, G. S.; Gong, L.; Chu, Paul K.

In: Physica Status Solidi - Rapid Research Letters, Vol. 6, No. 3, 03.2012, p. 117-119.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review