Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2998299
Keywords
ball milling; barium compounds; europium; excited states; phosphors; photoluminescence; yttrium compounds
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Funding
- National Science Council of Taiwan, Republic of China [NSC96-2622-E-150-034-CC3]
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Color-tunable phosphors of BaY2-xEuxZnO5 (x=0.001-0.9) were synthesized using a vibrating milled solid state reaction. The results indicate that the emission spectra of BaY2-xEuxZnO5 samples excited at 395 nm exhibit a series of shaped peaks assigned to the D-5(0)-> F-7(J) (J=0,1,2,3,4) transitions. Luminescence from the higher excited states, such as D-5(1), D-5(2), and D-5(3), were also observed even though the Eu3+ concentration was up to x=0.2. The chromaticity coordinate of BaY2-xEuxZnO5 phosphors varies with the Eu3+-doped concentrations from blue, white, to red, and which may be potentially applicable as a white light emitting phosphor for ultraviolet light emitting diodes.
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