Ultraviolet-illumination-enhanced photoluminescence effect in zinc oxide thin films
Chunming JinNorth Carolina State University Joint Department of Biomedical Engineering, and , Chapel Hill, North Carolina 27695-7575Ashutosh TiwariNorth Carolina State University Department of Materials Science and Engineering, , Raleigh, North Carolina 27695-7907Roger J. NarayanNorth Carolina State University Joint Department of Biomedical Engineering, and , Chapel Hill, North Carolina 27695-7575
2005en
ABI
Annotatsiya
We report an enhancement effect of ultraviolet illumination on the photoluminescence intensities of zinc oxide thin films. Large-grain ⟨0001⟩-textured zinc oxide thin films were deposited on amorphous-fused silica substrates using pulsed laser deposition. We found that the intensities of excitonic emission and green-band emission increased with ultraviolet light exposure time until a maximum value was achieved. We attribute this ultraviolet radiation enhancement effect to oxygen desorption on the surface of the zinc oxide thin film. We have proposed a phenomenological model to explain this interesting photoluminescence behavior.
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