Synthesis and Packaging Performance of Regular Spherical YAG:Ce3+ Phosphors for White LEDs

HUA You-jie; MA Hong-ping; ZHANG Chi; DENG De-gang; ZHAO Shi-long; HUANG Li-hui; WANG Huan

doi:10.3788/fgxb20133404.0427

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Synthesis and Packaging Performance of Regular Spherical YAG:Ce³⁺ Phosphors for White LEDs

更新时间：2020-08-12

- Synthesis and Packaging Performance of Regular Spherical YAG:Ce³⁺ Phosphors for White LEDs
- Chinese Journal of Luminescence Vol. 34, Issue 4, Pages: 427-432(2013)
- 作者机构：
  
  1. 中国计量学院材料科学与工程学院,浙江杭州,310018
  2. 浙江科技学院机械与自动化工程学院,浙江杭州,310012
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20133404.0427
  CLC： O482.31
- Received：08 January 2013，
  
  Revised：15 January 2013，
  
  Published Online：25 January 2013，
  
  Published：10 April 2013
- 稿件说明：
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华有杰, 马红萍, 张驰, 邓德刚, 赵士龙, 黄立辉, 王焕平, 徐时清. 用于白光LED的规则球形YAG:Ce3+荧光粉制备及封装性能研究[J]. 发光学报, 2013,34(4): 427-432

HUA You-jie, MA Hong-ping, ZHANG Chi, DENG De-gang, ZHAO Shi-long, HUANG Li-hui, WANG Huan-ping, XU Shi-qing. Synthesis and Packaging Performance of Regular Spherical YAG:Ce3+ Phosphors for White LEDs[J]. Chinese Journal of Luminescence, 2013,34(4): 427-432
华有杰, 马红萍, 张驰, 邓德刚, 赵士龙, 黄立辉, 王焕平, 徐时清. 用于白光LED的规则球形YAG:Ce3+荧光粉制备及封装性能研究[J]. 发光学报, 2013,34(4): 427-432 DOI： 10.3788/fgxb20133404.0427.

HUA You-jie, MA Hong-ping, ZHANG Chi, DENG De-gang, ZHAO Shi-long, HUANG Li-hui, WANG Huan-ping, XU Shi-qing. Synthesis and Packaging Performance of Regular Spherical YAG:Ce3+ Phosphors for White LEDs[J]. Chinese Journal of Luminescence, 2013,34(4): 427-432 DOI： 10.3788/fgxb20133404.0427.

摘要

采用高温固相法和筛分法合成了YAG:Ce

系列黄色荧光粉。采用X射线衍射仪(XRD)、电子扫描显微镜(SEM)、激光粒度分布仪及荧光分光光度计对所制备样品进行了表征。结果表明:所得3种样品形貌规则成球形

粒度分布集中

其中心粒径(D50)分别为29.59

17.40

9.56 m

粒径分布离散度分别为0.85

0.80和0.87。通过Reitveld精修拟合发现

随着荧光粉粒径大小的变化

基质的晶格常数并未发生明显变化。随着中心粒径(D50)逐渐变小

其荧光发射强度逐渐降低

且发生明显的蓝移

同时对蓝光的吸收逐渐减弱。通过对荧光粉与蓝光芯片配合所得白光LED的发光效率、显色指数及色温进行测试发现

当使用相同粉胶比浓度、相同点胶量时

随着荧光粉粒径的减小

所得白光LED的流明效率从109.95 lm/W降低到了99.85 lm/W

而显色指数和色温同时升高。

Abstract

YAG:Ce

phosphors with regular spherical morphology and different particle size distribution were successfully prepared by solid-state reaction followed by sieving method. XRD analysis revealed that crystal lattice parameters nearly unchanged with the variation of particle size. The effect of particle size distribution on optical properties was investigated by spectrophotometer. The results indicated that the absorption of blue light and emission intensity of phosphors simultaneously decreased with decreasing of particle size. Meanwhile

the maximum emission wavelength showed blue shift and chromaticity shifted toward green region with smaller particle size. The packaging performance suggested that the reduction in particle size will result in reduction of luminous efficiency. In contrast

the colour temperature (

) and general colour rendering index (Ra) increased with decreasing of particle size.

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Keywords

references

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