Identification of the I⁻ → Pr³⁺ charge transfer transition in the excitation spectrum of LuI₃:Pr³⁺

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• 作者：A.M. Srivastava
• 关键词：Excitation spectrum ; Charge transfer transition ; Pr³⁺ ; LuI₃
• 刊名：Optical Materials
• 出版年：2008
• 期刊代码：81_09253467
• 类别：ch
• 出版时间：June 2008
• 卷：30
• 期：10
• 页码：1567-1570
• 文件大小：134 K

摘要

The excitation spectrum of LuI₃:Pr³⁺ is dominated by a strong ultraviolet band centered at 320 nm. This band is identified as the I⁻ → Pr³⁺ charge transfer transition. The Pr³⁺ 4f² → 4f¹5d¹ interconfiguration optical transitions are located within the host lattice absorption band. The luminescence of LuI₃:Pr³⁺ under charge transfer excitation is dominated by the Pr³⁺ 4f² → 4f² intraconfiguration optical transitions. The absence of luminescence from the charge transfer state is due fast (nonradiative) relaxation of the charge transfer state into the Pr³⁺ 4f² states.