Luminescent Properties of New MgAl2O4/Ce∶YAG Transparent Ceramics for White LED Applications

HE Long-fei; FAN Guang-han; LEI Mu-yun; LOU Zai-liang; ZHENG Shu-wen; SU Chen; XIAO Yao; CH

doi:10.3788/fgxb20133402.0133

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Luminescent Properties of New MgAl₂O₄/Ce∶YAG Transparent Ceramics for White LED Applications

paper | 更新时间：2020-08-12

- Luminescent Properties of New MgAl₂O₄/Ce∶YAG Transparent Ceramics for White LED Applications
- Chinese Journal of Luminescence Vol. 34, Issue 2, Pages: 133-138(2013)
- 作者机构：
  
  1. 华南师范大学光电子材料与技术研究所,广东广州,510631
  2. 烁光特晶科技有限公司北京,100018
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20133402.0133
  CLC： TN383
- Received：20 September 2012，
  
  Revised：22 October 2012，
  
  Published：10 February 2013
- 稿件说明：
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贺龙飞, 范广涵, 雷牧云, 娄载亮, 郑树文, 苏晨, 肖瑶, 陈志武, 张涛. 白光LED用新型MgAl2O4/Ce∶YAG透明陶瓷的发光性能[J]. 发光学报, 2013,34(2): 133-138

HE Long-fei, FAN Guang-han, LEI Mu-yun, LOU Zai-liang, ZHENG Shu-wen, SU Chen, XIAO Yao, CHEN Zhi-wu, ZHANG Tao. Luminescent Properties of New MgAl2O4/Ce∶YAG Transparent Ceramics for White LED Applications[J]. Chinese Journal of Luminescence, 2013,34(2): 133-138
贺龙飞, 范广涵, 雷牧云, 娄载亮, 郑树文, 苏晨, 肖瑶, 陈志武, 张涛. 白光LED用新型MgAl2O4/Ce∶YAG透明陶瓷的发光性能[J]. 发光学报, 2013,34(2): 133-138 DOI： 10.3788/fgxb20133402.0133.

HE Long-fei, FAN Guang-han, LEI Mu-yun, LOU Zai-liang, ZHENG Shu-wen, SU Chen, XIAO Yao, CHEN Zhi-wu, ZHANG Tao. Luminescent Properties of New MgAl2O4/Ce∶YAG Transparent Ceramics for White LED Applications[J]. Chinese Journal of Luminescence, 2013,34(2): 133-138 DOI： 10.3788/fgxb20133402.0133.

摘要

采用金属醇盐法制备MgAl

前驱体

通过高温煅烧2~4 h得到纯相MgAl

粉体

再将其与YAG∶Ce荧光粉均匀混合

利用热压烧结并结合热等静压处理得到MgAl

/Ce∶YAG透明陶瓷。利用X射线衍射、紫外-可见分光光度计等测试手段对样品进行表征。样品由MgAl

和YAG两相组成

在340 nm和475 nm有两个激发峰。发射光谱在533 nm有一宽峰

属于Ce

的5d4f特征跃迁发射。该透明陶瓷封装蓝光芯片所得白光LED器件在35 mA驱动下的发光效率为133.47 lmW

-1

其寿命及色温稳定性优于采用传统方式封装的白光LED。实验结果表明MgAl

/Ce∶YAG透明陶瓷是一种可用于白光LED的新型荧光材料。

Abstract

High-purity ultrafine MgAl

powder was synthesized by metal-alkoxide method and calcining for 2~4 h.After mixing the YAG∶Ce phosphor with MgAl

powder

MgAl

/Ce∶YAG transparent ceramics were obtained by hot-pressed sintering and hot isostatic pressed sintering technique. The transparent ceramics were characterized by X-ray diffraction and UV-Vis spectrometer. The crystal phase of the transparent ceramic was composed of MgAl

and YAG. The excitation spectra had a weak band at 345 nm and a strong band at 475 nm. The broad emission peaks at about 533 nm can be attributed to 5d4f transition of Ce

ions. The luminous efficacy of the white LED which packaged by the transparent ceramic and blue LED chip was 133.47 lmW

-1

at 35 mA

and its color temperature are not varied with the change of driving current. It had better performance in stability and lifetime than that packaged in traditional ways under the same condition. All results show that MgAl

/Ce∶YAG transparent ceramic may be a promising fluorescent material for white LEDs.

关键词

Keywords

references

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