Journal
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
Volume 6, Issue 3, Pages 117-119Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssr.201105551
Keywords
photoconductivity; ZnO; nanostructures; vacancies
Funding
- National High-tech R&D Program of China [2009AA03Z305]
- National Natural Science Foundation of China [60876031, 60806044]
- Hong Kong Research Grants Council (RGC) [CityU 112608]
Ask authors/readers for more resources
ZnO nanowall networks grown on SiO2/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. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
