Abstract
(EuxY0.90−xLa0.1)2O3 (x=0.01–0.12) transparent ceramics were fabricated by conventional ceramics processing, and their luminescent properties were investigated. Compared with Eu:Y2O3, Eu:(Y0.9La0.1)2O3 ceramics exhibit much stronger excitation peaks at 395, 466 and 535nm, respectively. The strong excitation peak of Eu:(Y0.9La0.1)2O3 ceramics at 466nm is in good agreement with the emissions of InGaN blue chips (λem=450–470nm). Eu:(Y0.9La0.1)2O3 ceramics can be effectively excited by the light of 466nm, and show bright red emission at 613nm. The influences of contents of Eu3+ on the luminescent properties were studied and their Judd–Ofelt parameters were also calculated. The results showed that Eu:Y1.8La0.2O3 transparent ceramics exhibit the potential to act as a red phosphor for blue chips excited white LEDs.
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