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《Journal of Synthetic Crystals》 2006-01
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Preparation and Optical Characterizations of Zn_(1-x)Mg_xS Thin Films Prepared by Magnetron Sputtering

SUN Wang-dian,MIAO Yin-ping,ZHU Zhen(Department of Physics,Jinan University,Guangzhou 510632,China)  
Polycrystalline Zn_(1-x)Mg_xS thin films for Ⅱ-Ⅵ compound solid-solution semiconductor were successfully prepared on the quartz glass substrates by magnetron sputtering with two targets.The compositions,structures,morphologies and optical characterizations of the films were investigated by EDS,AFM,XRD,UV-visible absorption spectra and PL spectra.The results show that a cubic and hexagonal mixed phase crystal could be formed when x is from 0.33 to 0.75.The film has a very strong absorption in the short wavelength range and a violet light emission peak at room temperature.The intensity of the light emission peaks increase with increase of the Mg content of the films.The blue shifts of the absorption edge and the light emission peak also increase.The blue shifts indicate that the band-gap of the film increases from 3.6eV to 4.4eV.It is concluded that Zn_(1-x)Mg_xS thin films are promising materials for short wavelength optoelectronic applications and ultraviolet detectors.
【CateGory Index】: O484.1
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