中山大学学报自然科学版 ›› 2011, Vol. 50 ›› Issue (2): 62-65.

• 研究论文 • 上一篇    下一篇

白光LED用高亮度橙色高温相Ca3SiO4Cl2:Eu2+荧光粉

丁唯嘉1, 2,林委青1,张 梅3,王 静2,苏 锵2   

  1. (1. 华南农业大学 理学院生物材料研究所,广东 广州 510642;2. 中山大学 化学与化学工程学院,广东 广州 510275;3. 五邑大学 功能材料研究所,广东 江门 529020)
  • 收稿日期:2010-10-04 修回日期:1900-01-01 出版日期:2011-03-25 发布日期:2011-03-25
  • 通讯作者: 苏锵,王静

An Intense Orange Hightemperature Phase Ca3SiO4Cl2:Eu2+Phosphor for White LEDs

DING Weijia1, 2,LIN Weiqing1,ZHANG Mei3,WANG Jing2,SU Qiang2

  

  1. (1. Institute of Biomaterial, College of Science, South China Agricultural University, Guangzhou 510642,China;2. School of Chemistry and Chemical Engineering,Sun Yatsen University,Guangzhou 510275,China;3. Institute of Functional materials,Wuyi University,Jiangmen 529020,China)
  • Received:2010-10-04 Revised:1900-01-01 Online:2011-03-25 Published:2011-03-25

摘要: 采用高温固相法合成了高亮度橙色高温相Ca2.99Eu0.01SiO4Cl2荧光粉,进行了发光特性表征并探索了其在LED上的应用。Eu2+离子在Ca3SiO4Cl2基质中可被300~450 nm光有效激发发出橙黄光,发射光谱是Eu2+离子的特征4f65d1→4f7跃迁发射带。测量得到的Eu2+离子的荧光寿命为微秒量级,分别是 τ1=1.53 μs和τ2=7.29 μs。用该荧光粉制备了395nm近紫外芯片基和460 nm蓝光芯片基发光二极管,并测试了它们的发光性能,表明高温相Ca2.99Eu0.01SiO4Cl2荧光粉适合于用作白光LED的红黄色组分。

关键词: 白光LED, 碱土卤硅酸盐, 稀土

Abstract:

An intense orange hightemperature phase Ca3SiO4Cl2:Eu2+ phosphor was synthesized by hightemperature solidstate reactions and investigated by photoluminescence excitation, emission spectroscopies and lifetime. The excitation and emission spectra showed that the phosphor could be efficiently excited by the incident light of 300~450 nm, well matched with the emission band of 395 nmemitting InGaN chip, and emitted an intense orange light. The fluorescence lifetimes values of Eu2+ ion were determined to be 1.53 μs and 7.29 μs, respectively. By combining the phosphor with a 395 nmemitting InGaN chip, an intense orange LED was fabricated. Under 20 mA forwardbias current, its CIE chromaticity coordinates were (0.533, 0.446). The result showed that hightemperature phase Ca3SiO4Cl2:Eu2+ was a promising orange phosphor for nUV InGaNbased white LED.

Key words: white LED, alkali earth chlorosilicates, rare earth

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