发光学报2011，Vol.32Issue(11)：1099-1103,5.
Sr2+对白光LED用荧光粉YAG:Ce3+的增红研究
The Effect of Doping Sr2+ on Enhancement of Red Emission of Y2.78-xSrxGd0.1Al5O12:0.06Ce3+Phosphors
赵聪 1马明星 1韩涛 1曹仕秀 2朱达川2
作者信息
- 1. 四川大学材料科学与工程学院,四川成都,610065
- 2. 重庆文理学院材料交叉学科研究中心,重庆市高校微纳米材料工程与技术重点实验室,重庆,402168
- 折叠
摘要
Abstract
Y2.78-xSrxGd0.1Al5O12: 0.06Ce3+ phosphors were synthesized by co-precipitation method. The crystalline structure and Spectra properties of Y2.78-xSrxGd0.1Al5O12: 0.06Ce3+ phosphors were investigated by X-ray diffraction(XRD)and fluorescence spectrophotometer. The color temperatures of the white LEDs fabricated with blue chip and as-prepared phosphors were studied by HSP-6000 optical spectrum analyzer. It is found that the mole fraction of Sr2+ has obvious influences on the emission wavelength and intensity of as-prepared phosphors. The emission wavelengths of as-prepared phosphors display red-shift at first and then blue-shift appear with the molar of Sr2+ increasing. The emission intensity hardly decreases with Sr2+ mole fraction when it is below 0.05. And then the intensity decreases slowly with the mole fraction of Sr2+ increasing from 0.05 to 0.1, but decreases sharply when the mole fraction of Sr2+ is above 0.1. With the increase of mole fraction of Sr2+ , the color temperatures of white light decrease at first, and then increase owing to the interaction of emission wavelength and intensity. When the mole fraction of Sr2+ exceeds 0. 2, the impure phase-A appears which has negative effects on the luminescence property of as-prepared phosphors.关键词
Y2.78-xSrxGd0.1Al5O12:0.06Ce3+ phosphors/red-shift/co-precipilalion methodKey words
Y2.78-xSrxGd0.1Al5O12:0.06Ce3+ phosphors/red-shift/co-precipilalion method引用本文复制引用
赵聪,马明星,韩涛,曹仕秀,朱达川..Sr2+对白光LED用荧光粉YAG:Ce3+的增红研究[J].发光学报,2011,32(11):1099-1103,5.
