发光二极管用荧光材料Sr2CeO4-Sm3+合成及其发光特性.pdf

第23卷第3期 无机材料学报 V01．23，No．3 Journalof Materials 2008年5月 Inorganic May,2008 文章编号：1000-324X(2008)03-0471—04 焦海燕，王育华，张加驰 (兰州大学物理科学与技术学院功能与环境材料研究所，兰州730000) 摘要。 质．结果表明，在365nm激发下，从荧光光谱中可以看出存在从基质向稀土离子的能量转移．通过调节荧光材 时，体系发出很强的白光；当Sm”离子浓度较大(3％一15％)时，体系发出红光．测量了荧光材料的色坐标， 单一白色荧光材料． 关键词：Sr2Ce04：Sm3+；能量传递；荧光材料；UV-LED 中图分类号，0482，0614文献标识码，A of for andLuminescentCharacteristics Synthesis Diode Light-emitting JIAO Jia-Chi Hai-Yan，WANGYu-Hua，ZHANG ofMaterials of Scienceand Physical Technology，Lanzhou (Department Science，College 730000，China) were Abstract：Thetrivalentsamarium color-tunable dopedSr2Ce04 phosphorssuccessfullysynthe- for6handtheirluminescent were sizedsolidstatereactionat1200。C characteristicsstudied．The by resultsindicatethatthe cantransferits torareearthionSm3+whenexcitedwith host excitingenergy 365nm emissioncolorcanbe activator’Sconcentrationin light．The changedbytuning Sr2Ce04：Sm3+ emits white whentheconcentrationofthe Sm3+ phosphors．Thedopedcompoundstrong fight doped is than theSma+concentrationisincreasedfrom emitsred lower 3％．When 3％to15％，it light．The coordinateof ismeasuredto chromaticity Sr2Ce04：1％Sm3+phosphor isclosedtothe