Making red emitting phosphors with Pr3+
Making red emitting phosphors with Pr3+
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DOI：
10.1016/j.optmat.2004.09.027
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发表时间：
2006-01-01
影响因子：
3.9
通讯作者：
Bettinelli, M
中科院分区：
文献类型：
--
作者：
Boutinaud, P;Pinel, E;Bettinelli, M
以Pr3+为发光激活剂，采用含闭壳过渡金属离子（特别是钛酸盐、钒酸盐和铌酸盐）的主体晶格制备了紫外光激发的红发荧光粉。在这些氧化晶格中，低价间电荷转移态（IVCT）诱导了原本发出绿蓝色P-3(0)能级的猝灭。基于d(0)晶格阳离子（Mn+）的光学电负性和Pr3+ - Mn+的平均距离，提出了预测这些晶格中P-3(0)猝灭的简单准则。(c) 2005 Elsevier B.V.版权所有
UV-excited red-emitting phosphors are obtained using Pr3+ as the luminescent activator and host lattices containing closed-shell transition metal ions (especially titanates, vanadates and niobates). In these oxidant lattices, the quenching of the otherwise greenish-blue emitting P-3(0) level is induced by a low-lying Pr-to-metal intervalence charge transfer state (IVCT). A. simple criterion based on the optical electronegativities of the d(0) lattice cations (Mn+) and average Pr3+ - Mn+ distances is proposed to predict P-3(0) quenching in these lattices. (c) 2005 Elsevier B.V. All rights reserved.