【摘 要】
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CeOx films are deposited onto the surface of a SiO2 matrix embedded with Si nanocrystals (nc-Si/SiO2) by electron-beam evaporation of CeO2 powder in high vacuum
【机 构】
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School of Vacuum Section of Mechanical and Automotive Engineering, Hefei University of Technology, H
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CeOx films are deposited onto the surface of a SiO2 matrix embedded with Si nanocrystals (nc-Si/SiO2) by electron-beam evaporation of CeO2 powder in high vacuum. By tuning the thickness of the CeOx film, photoluminescence (PL) spectra centred at 330, 358, 378, 388, 400, and 450nm, respectively, are observed. It has been identified that the PL centred at 358, 388 and 400nm are from cerium silicide compounds, and those centred at 330nm, 378nm are due to Ce3+ ions, while the 450nm PL is from the defects in the SiO2 matrix.
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