Charge states of a hydrogen defect (3326cm−1 line) in ZnO

The hydrogen defect in ZnO that gives rise to a local vibrational mode at 3326cm−1 is investigated by means of IR absorption. Sub-band gap illumination results in the appearance of a new line at 3358cm−1 at the expense of the 3326cm−1 signal. The measurements identify both IR absorption signals as O...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2012-08, Vol.407 (15), p.2883-2885
Main Authors: Herklotz, F., Lavrov, E.V., Weber, J.
Format: Article
Language:English
Subjects:
Charge
Condensed matter
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Defects
Electron states
Exact sciences and technology
Expenses
Hydrogen
Hydrogen storage
Ii-vi semiconductors
Illumination
Impurity and defect levels
Infrared radiation
IR absorption
Lattice dynamics
Localized modes
Phonons and vibrations in crystal lattices
Physics
Zinc oxide
ZnO
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Summary:The hydrogen defect in ZnO that gives rise to a local vibrational mode at 3326cm−1 is investigated by means of IR absorption. Sub-band gap illumination results in the appearance of a new line at 3358cm−1 at the expense of the 3326cm−1 signal. The measurements identify both IR absorption signals as O–H stretch modes of the same defect in different charge states. The effect of the sub-band gap light strongly suggest that this defect has a deep level in the band gap. Additionally, results on the thermal stability of the 3326cm−1 feature are presented.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2011.08.052