Spectral variations of Ca₃Sc₂Si₃O₁₂:Ce phosphors via substitution and energy transfer

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• 作者：Yuanhong LIU ; Weidong ZHUANG ; ^{wdzhuang@126.com} ; 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 Ce³⁺ and Er³⁺ co-doped Ca₃Sc₂Si₃O₁₂ phosphors. Mg²⁺ ion, which was likely incorporated into the Sc³⁺ 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 Ce³⁺. The green emission belonged to the 5d鈫?f transition of Ce³⁺ moved toward longer wavelength by addition of Mg²⁺ in Ce³⁺ and Er³⁺ co-doped Ca₃Sc₂Si₃O₁₂ 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 Mg²⁺. The results showed that the weakening of luminescence intensity at around 525 nm caused by the absorption of Er³⁺, which had little influence on the environment of the crystal field.