Journal
JOURNAL OF APPLIED PHYSICS
Volume 117, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4906444
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Funding
- Ministry of Education of China [20111101120021]
- National Nature Science Research Fund [11374033]
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We studied the photoluminescence (PL) and structural properties of Ce and Yb co-doped silicon oxide films after high temperature annealing. The PL spectra of Ce3+ and Yb3+ ions were sensitive to the structural variation of the films, and the Yb PL intensities were significantly enhanced especially upon 1200 degrees C annealing. X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy, indicated that rare earth silicates and the CeO2 phase had formed in the oxides. The proportions of the phases varied with the nominal Si-richness of the films. Energy transfer from the excited Ce3+ to Yb3+ can be inferred from both PL excitation and decay spectra. (C) 2015 AIP Publishing LLC.
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