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Proceedings Paper

Room temperature ultraviolet emission from microcrystallite ZnO thin films
Author(s): Weiwei Dong; Ruhua Tao; Qingli Su; Zanhong Deng; Xiaodong Fang
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Paper Abstract

Strong room temperature ultraviolet emission is observed in highly oriented ZnO microcrystallite films prepared on (001) sapphire substrates by pulsed laser deposition method (PLD). The influences of substrate temperature, distance between the target and the substrate, oxygen pressure, and laser energy density on structural and optical properties were systemically studied by x-ray diffraction (XRD), scanning electron microscopy (SEM) and room temperature photoluminescence (PL) measurements. The XRD as well as the SEM results showed that all the four experiment parameters had obvious effects on the structure and micrograph of the derived ZnO films. From the room temperature photoluminescence spectra, all the derived samples have a strong ultraviolet (UV) emission about 376nm, and the visible emission is depressed greatly. Additionally, the results showed that the processing parameters could obviously affect the PL properties and the reasons were also discussed. From our results, the UV PL intensity is strongly depending both on the crystallinity and the stoichiometry of the ZnO films.

Paper Details

Date Published: 23 January 2006
PDF: 7 pages
Proc. SPIE 6029, ICO20: Materials and Nanostructures, 60290X (23 January 2006);
Show Author Affiliations
Weiwei Dong, Anhui Institute of Optics and Fine Mechanics (China)
Ruhua Tao, Anhui Institute of Optics and Fine Mechanics (China)
Qingli Su, Anhui Institute of Optics and Fine Mechanics (China)
Zanhong Deng, Anhui Institute of Optics and Fine Mechanics (China)
Xiaodong Fang, Anhui Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 6029:
ICO20: Materials and Nanostructures
Wei Lu; Jeff Young, Editor(s)

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