YVO 4 : Eu 3+ photoluminescence films with Bi doping
Rare Metals(2013)
Abstract
Y 0.95− x Eu 0.05 VO 4 : x Bi 3+ ( x = 0, 0.02, 0.04, 0.06, 0.08, and 0.10 mol) six photoluminescence films were deposited on glass substrates by sol–gel spin-coating method. Their morphology and optical property were investigated. The micrographs for the six samples have no change with Bi 3+ doping. The emission spectra result shows that a dominant red emission peak at 620 nm, which is due to the Eu 3+ electric dipole transition of 5 D 0 → 7 F 2 , is observed under excitation wavelengths 254 nm. Furthermore, with the content of Bi 3+ increasing from 0 to 0.08 mol, the emission intensity of samples strengthens and reaches a maximum at x = 0.08 mol, then decreases with the doping content to 0.10 mol.
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Key words
Photoluminescence film,Bi3+ content,Emission intensity
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