Characterization and photoluminescence properties of Eu 3+ doped 3CdO-Al 2O 3-8SiO 2 amorphous system for white light-emitting diodes

Document Type

Article

Publication Date

1-15-2009

Abstract

A new phosphor, Eu 3+ doped 3CdO-Al 2O 3-3SiO 2 (CAS:Eu 3+), is prepared by a convenient sol - gel method. Under excitation either into the 5L 6 state with 394 nm or the 5D 2 state with 464 nm, the phosphor gives a red emission at 610 nm originating from the 5D 0 → 7F 2 transition of Eu 3+. The luminescence properties compared with YAG:Ce 3+ and Y 2O 3:Eu 3+ are studied. The red emission of CAS:Eu 3+ is about 3 times stronger than that of commercial Y 2O 3:Eu 3+. The high color saturation (the chromaticity index is x = 0.6209, y = 0.3461) and the low thermal quenching effect make phosphor CAS:Eu 3+ a promising candidate for the phosphor-converted white LEDs.

Publication Source (Journal or Book title)

Journal of Physical Chemistry C

First Page

493

Last Page

495

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