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采用凝胶-燃烧法合成了Ca3Sc2Si3O12 ∶Ce绿色LED用荧光粉,用X射线粉末衍射(XRD)、扫描电镜(SEM)、荧光光谱仪等对合成产物进行了分析和表征.结果表明:通过添加H3BO3做助熔剂,制得的荧光粉晶相纯正,颗粒形貌均呈现为较规则的类球形,而且所得荧光粉的粒径均小于1 μm.发射光谱呈现为一宽带,发射主峰位于505 nm,该宽峰对应于Ce3+
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关键词:
- 白光LED /
- 荧光粉 /
- Ca3Sc2Si3O12 ∶Ce /
- 发光
Green-emitting Ca3Sc2Si3O12:Ce3+ phosphors for white LED are successfully synthesized by a gel-combustion method. The as-synthesized phosphors are investigated by XRD, SEM, and fluorescence spectrophotometer. The results indicate that the crystal structure of the phosphor is pure. The particle morphology of the sample is basically spherical in shape. The particle size is smaller than 1μm. The emission spectrum shows a broad band emission, and the main emission peak locates at 505 nm. Bright green-emission broadening is attributed to the characteristic emissions 5d-2F5/2 and 5d-2F7/2 transitions of Ce3+. The optimal doping concentration of Ce in Ca3-xSc2Si3O12:Ce is x=0.1. The thermal stability and the luminescence intensity of the Ca3Sc2Si3O12:Ce3+ are significantly improved compare with those of YAG:Ce.-
Keywords:
- white LED /
- phosphor /
- Ca3Sc2Si3O12:Ce /
- luminescence
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[2] Hu X S, Zhuang W D, Ye X Y, Gao W G, Huang X W 2008 Adv. Mater. Ind. 5 50 (in Chinese) [胡运生、庄卫东、叶信宇、高文贵、黄小卫 2008 新材料产业 5 50 ]
[3] Su Q, Wu H, Pan Y X, Xu J, Guo C F, Zhang X M, Zhang J H, Wang J, Zhang M 2005 J. Rare Earth 23 513
[4] Piao X Q, Horikawa T, Hanzawa H, Machida K 2006 Chemisty Letters 35 334
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[7] Yang Z P, Liu Y F, Wang L W, Yu Q M, Xing Z J, Xu X L 2007 Acta Phys. Sin. 56 546(in Chinese)[杨志平、刘玉峰、王利伟、余泉茂、熊志军、徐小岭 2007 物理学报 56 546]
[8] Zhang S S, Zhuang W D, Zhao C L, He H Q, Huang X W 2004 J. Rare Earth 1 129
[9] Shimomura Y, Kijima N 2007 U.S. Patent 007189340 B2
[10] Shimomura Y, Honma T, Shigeiwa M, Akai T, Okamoto K 2007 J. Electrochem. Soc. 154 35
[11] Shimomura Y, Kurushima T, Shigeiwa M, Kijima N 2008 J. Electrochem. Soc. 155 45
[12] Liu Y H, Hao J H, Zhuang W D, Hu Y S 2009 J. Phys. D: Appl. Phys. 42 245102
[13] Liu Y H, Zhuang W D, Hu Y S, Gao W G J. Rare Earths 28 181
[1] NaKamura S, MuKai T 1994 Appl. Phys. Lett. 64 1687
[2] Hu X S, Zhuang W D, Ye X Y, Gao W G, Huang X W 2008 Adv. Mater. Ind. 5 50 (in Chinese) [胡运生、庄卫东、叶信宇、高文贵、黄小卫 2008 新材料产业 5 50 ]
[3] Su Q, Wu H, Pan Y X, Xu J, Guo C F, Zhang X M, Zhang J H, Wang J, Zhang M 2005 J. Rare Earth 23 513
[4] Piao X Q, Horikawa T, Hanzawa H, Machida K 2006 Chemisty Letters 35 334
[5] Wei X D, Cai L Y, Lu F C, Chen X L, Chen X Y, Liu Q L 2009 Chin. Phys. B 18 3555
[6] Schlotter P, Baur J, Hielscher C, Kunzer M, Obloh H, Schmidt R, Schneider J 1999 Mater. Sci. Eng. B 59 390
[7] Yang Z P, Liu Y F, Wang L W, Yu Q M, Xing Z J, Xu X L 2007 Acta Phys. Sin. 56 546(in Chinese)[杨志平、刘玉峰、王利伟、余泉茂、熊志军、徐小岭 2007 物理学报 56 546]
[8] Zhang S S, Zhuang W D, Zhao C L, He H Q, Huang X W 2004 J. Rare Earth 1 129
[9] Shimomura Y, Kijima N 2007 U.S. Patent 007189340 B2
[10] Shimomura Y, Honma T, Shigeiwa M, Akai T, Okamoto K 2007 J. Electrochem. Soc. 154 35
[11] Shimomura Y, Kurushima T, Shigeiwa M, Kijima N 2008 J. Electrochem. Soc. 155 45
[12] Liu Y H, Hao J H, Zhuang W D, Hu Y S 2009 J. Phys. D: Appl. Phys. 42 245102
[13] Liu Y H, Zhuang W D, Hu Y S, Gao W G J. Rare Earths 28 181
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