Fabrication and Characteristics of White Light-emitting Diode

JIANG Da-peng; ZHAO Cheng-jiu; HOU Feng-qin; LIU Xue-yan; FAN Yi; ZHANG Li-gong; CHU Ming-

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Fabrication and Characteristics of White Light-emitting Diode

更新时间：2020-08-11

- Fabrication and Characteristics of White Light-emitting Diode
- Chinese Journal of Luminescence Vol. 24, Issue 4, Pages: 385-389(2003)
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所, 激发态物理重点实验室,吉林长春,130033
  2. 中国科学院长春光学精密机械与物理研究所,吉林长春,130022
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN312.8
- Received：15 October 2002，
  
  Revised：20 May 2003，
  
  Published：20 July 2003
- 稿件说明：
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蒋大鹏, 赵成久, 侯凤勤, 刘学彦, 范翊, 张立功, 褚明辉, 申德振, 范希武. 白光发光二极管的制备技术及主要特性[J]. 发光学报, 2003,24(4): 385-389

JIANG Da-peng, ZHAO Cheng-jiu, HOU Feng-qin, LIU Xue-yan, FAN Yi, ZHANG Li-gong, CHU Ming-hui, SHEN De-zhen, FAN X W. Fabrication and Characteristics of White Light-emitting Diode[J]. Chinese Journal of Luminescence, 2003,24(4): 385-389
蒋大鹏, 赵成久, 侯凤勤, 刘学彦, 范翊, 张立功, 褚明辉, 申德振, 范希武. 白光发光二极管的制备技术及主要特性[J]. 发光学报, 2003,24(4): 385-389 DOI：

JIANG Da-peng, ZHAO Cheng-jiu, HOU Feng-qin, LIU Xue-yan, FAN Yi, ZHANG Li-gong, CHU Ming-hui, SHEN De-zhen, FAN X W. Fabrication and Characteristics of White Light-emitting Diode[J]. Chinese Journal of Luminescence, 2003,24(4): 385-389 DOI：

摘要

利用发射波长为470nm的蓝光发光二极管作为基础光源

通过荧光粉转换方法制备白光发光二极管

荧光粉主要采用稀土激活的铝酸盐Y

:Ce

(YAG)。在工作电流为15mA条件下

所研制的白光LED的法向光强为2890mcd;色坐标为

=0.29

=0.33;显色指数为77;流明效率为149lm/W。研究制备了不同色温的白光LED

色温范围从2700～8000K

研究了色温与色坐标之间的对应关系。并且与国外同类产品进行比较

部分指标已经超过了国外同类产品水平。

Abstract

White light-emitting diodes were fabricated by phosphor conversion. The blue LED chip (470nm

GaN based) was used as primary light source and Y

:Ce

(YAG) phosphors was used as light changing materials. The excitation spectrum peak of the phosphor is the same as the luminescent peak of blue chip at 470nm. The PL spectrum peak of the phosphors is at 570nm. The white light was yielded by mixing 470nm with 570nm. The luminescent intensity of white LED is 2890mcd. The color coordinates of white LED is

=0.29

=0.33 and the color index is 77. The efficiency of the white LED is 149lm/W. The light conversion efficiency of phosphors is 269 from blue LED to white LED. The white LEDs with different color temperature from 2700～8000K were fabricated. The relationship between the color temperature and the color coordinates of white LED was investigated. When the color temperature is under 3700K

the color coordinates

and

are bigger than 0.4. When the color temperature is above 8000K

the color coordinates

and

are smaller than 0.3. When the color coordinates

and

are 0.33 respectively

the color temperature is about 5500K.

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