Yellow-emitting (Ca₂Lu_{1?span style='font-style: italic'>x}Ce_x)(ScMg)Si₃O₁₂ phosphor and its application for white LEDs

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• 作者：Xia Zhang^a ; Yongfu Liu^a ; ^b ; ^{liuyongfu1985@126.com} ; Zhendong Hao^a ; Yongshi Luo^a ; Xiaojun Wang^c ; Jiahua Zhang^a ; ^{zhangjh@ciomp.ac.cn}
• 关键词：A. Inorganic compounds ; A. Optical materials ; D. Luminescence ; D. Optical properties
• 刊名：Materials Research Bulletin
• 出版年：2012
• 出版时间：May, 2012
• 年：2012
• 卷：47
• 期：5
• 页码：1149-1152
• 全文大小：523 K

文摘

Luminescence properties of the yellow-emitting (Ca₂Lu_1?em>xCe_x)(ScMg)Si₃O₁₂ (CLSM:xCe³⁺ x = 0.01-0.15) phosphor are investigated for various Ce³⁺ concentrations. Different Ce³⁺ emission sites and energy transfers between them are observed, resulting in a red shift of the emission spectra from 530 to 575 nm with increasing x from 0.01 to 0.15. Combining with blue (460 nm) InGaN LEDs, CLSM:Ce³⁺ shows excellent performances for phosphor-converted white LEDs with higher color rendering index R_a of 87.4-87.9 and lower color temperature T_C of 5034-5814 K, especially for warm pcWLEDs with a high color rendering (R_a > 80) and a low color temperature (T_C < 4000 K). Thermal quenching behaviors depending on Ce³⁺ concentrations and temperatures are discussed.