Emission quenching induced by intervalence charge transfer in Pr3+- or Tb3+-doped YNbO4 and CaNb2O6

被引：135

作者：

Boutinaud, P. ^{[1
]}

Cavalli, E.

Bettinelli, M.

机构：

[1] Univ Blaise Pascal, Lab Mat Inorgan, UMR 6002, Aubiere, France

[2] ENSCCF, Aubiere, France

[3] Univ Parma, Dipartimento Chim Gen Inorgan Chim Analit Chim Fi, I-43100 Parma, Italy

[4] Univ Verona, Dipartimento Sci & Tecnol, I-37100 Verona, Italy

[5] UdR Verona, INSTM, Verona, Italy

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2007年 / 19卷 / 38期

关键词：

D O I：

10.1088/0953-8984/19/38/386230

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The excitation and emission properties of Pr3+ and Tb3+ ions doped into YNbO4 (hereafter YNB) and CaNb2O6 ( hereafter CNB) have been studied as a function of the temperature in the 10-600 K range. The observed quenching of the luminescence from the P-3(0) (Pr3+) and D-5(3) (Tb3+) states has been related to an electron transfer process from the trivalent rare earth to the Nb5+ ion inducing the formation of an intervalence charge transfer (IVCT) state. On this basis a detailed picture of the excited-state dynamics of the investigated compounds is presented, taking into account the characteristics of the host lattices and of the involved optically active ions.

引用

页数：11

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