Zhao Yi-Kun et al 2005 Chinese Phys. Lett. 22 2973 doi:10.1088/0256-307X/22/11/069
Zhao Yi-Kun1, Lian Jie1, Wang Qing-Pu1, Zhang Xi-Jian2, Zhang Sa-Sa1 and Wang Gong-Tang3
Show affiliationsDifferent photoluminescence (PL) spectra are observed for rf magnetron sputtered polycrystalline Mg0.25Zn0.75O and Mg0.37Zn0.63O films on silicon substrates when excited by different wavelengths. When the excitation wavelength is 280 nm, a UV emission peak at 370 nm and a blue peak at 462 nm are generated for the Mg0.25Zn0.75O film, and those two peaks for the Mg0.37Zn0.63O film shift to 366 nm and 466 nm, respectively. The wavelengths of the PL peaks are related to the excitation wavelength. The stronger peak is obtained in the blue band due to a large number of oxygen vacancies caused by excess Zn and Mg atoms, while the weaker peak is obtained in the ultraviolet band.
68.55.Ln Defects and impurities: doping, implantation, distribution, concentration, etc.
Issue 11 (November 2005)
Received 9 June 2005
Zhao Yi-Kun et al 2005 Chinese Phys. Lett. 22 2973
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