Consequences of ET and MMCT on Luminescence of Ce3+-, Eu3+-, and Tb3+-doped LiYSiO4

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• 作者：Rui Shi ; Guokui Liu ; Hongbin Liang ; Yan Huang ; Ye Tao ; Jing Zhang
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：August 1, 2016
• 年：2016
• 卷：55
• 期：15
• 页码：7777-7786
• 全文大小：762K
• 年卷期：0
• ISSN：1520-510X

文摘

Ce³⁺, Eu³⁺, and Tb³⁺ singly doped, Ce³⁺-Tb³⁺, Tb³⁺-Eu³⁺, and Ce³⁺-Eu³⁺ doubly doped, as well as Ce³⁺-Tb³⁺-Eu³⁺ triply doped LiYSiO₄ phosphors were prepared by a high-temperature solid-state reaction technique. Rietveld refinement was performed to determine the structure of host compound. The cross-relaxation (CR) of Tb³⁺ is quantitatively analyzed with the Inokuti–Hirayama model of energy transfer (ET), and the site occupancy is confirmed by emission spectra of Eu³⁺. ET and metal–metal charge transfer (MMCT) are systematically investigated in Ce³⁺-Tb³⁺, Tb³⁺-Eu³⁺, and Ce³⁺-Eu³⁺ doubly doped systems. The combined effects of ET and MMCT on luminescence and emission color of Ce³⁺-Tb³⁺-Eu³⁺ triply doped samples are discussed in detail, showing that the photoluminescence emission is tunable in a large color gamut.