A Single White Phosphor Suitable for Near Ultraviolet Excitation Applied to New Generation White LED Lighting

SUN Xiao-yuan; ZHANG Jia-hua; ZHANG Xia; LIU Shen-xin; JIANG Da-peng; WANG Xiao-jun

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A Single White Phosphor Suitable for Near Ultraviolet Excitation Applied to New Generation White LED Lighting

更新时间：2020-08-11

- A Single White Phosphor Suitable for Near Ultraviolet Excitation Applied to New Generation White LED Lighting
- Chinese Journal of Luminescence Vol. 26, Issue 3, Pages: 404-406(2005)
- 作者机构：
  
  1. 中国科学院, 激发态物理重点实验室, 吉林, 长春, 130033
- 作者简介：
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SUN Xiao-yuan, ZHANG Jia-hua, ZHANG Xia, et al. A Single White Phosphor Suitable for Near Ultraviolet Excitation Applied to New Generation White LED Lighting. [J]. Chinese Journal of Luminescence 26(3):404-406(2005)
DOI：

SUN Xiao-yuan, ZHANG Jia-hua, ZHANG Xia, et al. A Single White Phosphor Suitable for Near Ultraviolet Excitation Applied to New Generation White LED Lighting. [J]. Chinese Journal of Luminescence 26(3):404-406(2005) DOI：

摘要

首次报道单一Sr,2,MgSiO,5,:Eu,2+,材料的白光发射性质。发射光谱由两个谱带组成,分别位于470,570nm处,并具有不同的荧光寿命,归结为处于不同格位上的二价铕离子的发射,它们混合成白光。这两个发射带所对应的激发光谱均分布在250～450nm的紫外区,利用该荧光粉和具有400nm近紫外光发射的InGaN管芯制成了白光LED。正向驱动电流为20mA时,色温为5664K;发光色坐标为,x,=0.33,y,=0.34;显色指数为85%;光强达8100cd/m,2,。实验表明,器件的色坐标和显色指数等参数随正向驱动电流的变化起伏量小于5%,优于目前商用的蓝光管芯泵浦白光LED,报道的单一白光荧光粉在新一代白光LED照明领域具有广阔的应用前景。

Abstract

We report, for the first time, white light emissions of a single Sr,2,MgSiO,5,:Eu,2+, material. The emission spectrum consists of two bands, located at 470 and 570 nm, respectively. The two bands have different fluorescence lifetimes, being attributed to Eu,2+, ions substituted by different Sr sites. White light is generated by mixing the two colors. The excitation spectra of the two bands are both distributed within UV range. A white LED has been fabricated employing the white phosphor and a near UV of 400 nm InGaN chip. As the forward-bias current is 20 mA, the color temperature is 5664 K, the color coordinates(CIE) are ,x,=0.33,y,=0.34, the color rendering index(CRI) is 85% and the luminescent intensity is 8100 cd/m,2,. Experiments demonstrate that CIE and CRI of the white LED change slightly with the variation of forward-bias current, indicating that the phosphor presented in this work is a promising material for use in new generation white LED lighting.

关键词

白光LED白光荧光粉单一白光荧光粉

Keywords

white LEDwhite phosphorsingle white phosphors

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Related Institution

Hunan Pusisat Opto Technology Co.， LTD.

College of Chemistry and Chemical Engineering， Hunan Normal University

Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences

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School of Mechanical Science and Engineering, Huazhong University of Science and Technology

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