Acoustoelectric current saturation in {ital c}-axis fiber-textured polycrystalline zinc oxide films

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.117819· OSTI ID:404003

Pompe, T; Srikant, V; Clarke, D R ^[1]

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1. Materials Department, College of Engineering, University of California, Santa Barbara, California 93106-5050 (United States)

Acoustoelectric current saturation, which until now has only been observed in piezoelectric single crystals, is observed in thin polycrystalline zinc oxide films. Epitaxial ZnO films on {ital c}-plane sapphire and textured ZnO polycrystalline films on fused silica both exhibit current saturation phenomenon. The values of the saturation current densities are in the range 10{sup 5}{endash}10{sup 6} A/cm{sup 2}, depending on the carrier concentration in the film, with corresponding saturation electric fields of 3{endash}5{times}10{sup 3} V/cm. In addition to the current saturation, the electrical properties of the films degraded with the onset of the acoustoelectric effect but could be restored by annealing at 250{degree}C in a vacuum for 30 min. {copyright} {ital 1996 American Institute of Physics.}

• DOE Contract Number: FG03-91ER45447
• OSTI ID: 404003
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 26 Vol. 69; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACOUSTOELECTRIC EFFECTS
ANNEALING
ELECTRIC CONDUCTIVITY
GRAIN BOUNDARIES
PIEZOELECTRIC MATERIALS
PIEZOELECTRICITY
POLYCRYSTALS
SOUND WAVES
TEXTURE
THIN FILMS
ZINC OXIDES