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白光LED用新型MgAl2O4/Ce∶YAG透明陶瓷的发光性能
Luminescent Properties of New MgAl2O4/Ce∶YAG Transparent Ceramics for White LED Applications
- 发光学报 2013年34卷第2期 页码：133-138
- 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：国家自然科学基金重点项目(61176043)();广东省战略性新兴产业专项资金LED产业项目(2010A081002005,2011A081301003,2012A08
DOI：10.3788/fgxb20133402.0133
中图分类号： TN383纸质出版日期：2013-2-10，
收稿日期：2012-9-20，
修回日期：2012-10-22，
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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MgAl<sub>2</sub>O<sub>4</sub>/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 MgAl<sub>2</sub>O<sub>4</sub>/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MgAl<sub>2</sub>O<sub>4</sub>/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 MgAl<sub>2</sub>O<sub>4</sub>/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
2
O
4
前驱体
通过高温煅烧2~4 h得到纯相MgAl
2
O
4
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
2
O
4
/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
2
O
4
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
3+
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
2
O
4
/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
2
O
4
powder was synthesized by metal-alkoxide method and calcining for 2~4 h.After mixing the YAG∶Ce phosphor with MgAl
2
O
4
powder
MgAl
2
O
4
/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
2
O
4
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
3+
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
2
O
4
/Ce∶YAG transparent ceramic may be a promising fluorescent material for white LEDs.
关键词
YAG铝酸镁透明陶瓷白光LED
Keywords
YAGMgAl2O4transparent ceramicwhite LED
references
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