Spectral variations of Ca<sub>3sub>Sc<sub>2sub>Si<sub>3sub>O<sub>12sub>:Ce phosphors via substitution and energy transfer
- 作者：Yuanhong LIU ; Weidong ZHUANG<sup> ; sup><sup>wdzhuang@126.comsup> ; Ronghui LIU ; Yunsheng HU ; Huaqiang HE ; Shusheng ZHANG ; Wei GAO
- 关键词：luminescence ; white LED ; co-doped ; spectral variation ; rare earths
- 刊名：Journal of Rare Earths
- 出版年：2012
- 期刊代码：7_10020721
- 类别：ms
- 出版时间：April, 2012
- 卷：30
- 期：4
- 页码：339-341
- 文件大小：376 K
摘要
The luminescence intensity of emission peak at around 525 nm decreased in the Ce<sup>3+sup> and Er<sup>3+sup> co-doped Ca<sub>3sub>Sc<sub>2sub>Si<sub>3sub>O<sub>12sub> phosphors. Mg<sup>2+sup> ion, which was likely incorporated into the Sc<sup>3+sup> position of the host crystal, was co-doped to adjust the crystal field and compensate for the excess positive charge due to the doping of Ce<sup>3+sup>. The green emission belonged to the 5d鈫?f transition of Ce<sup>3+sup> moved toward longer wavelength by addition of Mg<sup>2+sup> in Ce<sup>3+sup> and Er<sup>3+sup> co-doped Ca<sub>3sub>Sc<sub>2sub>Si<sub>3sub>O<sub>12sub> phosphor, which could increase the brightness of the phosphor. However, the position of weakening of luminescence intensity at around 525 nm remained basically unchanged by increasing the amount of Mg<sup>2+sup>. The results showed that the weakening of luminescence intensity at around 525 nm caused by the absorption of Er<sup>3+sup>, which had little influence on the environment of the crystal field.