On the "Bi3+-Ti4+" charge transfer transition in the pyrochlore Y2Ti2O7:Bi3+

被引：19

作者：

Srivastava, A. M. ^{[1
]}

Comanzo, H. A. ^{[1
]}

Camaradello, S. J. ^{[1
]}

机构：

[1] GE Global Res Ctr, Niskayuna, NY 12309 USA

来源：

OPTICAL MATERIALS | 2015年 / 48卷

关键词：

Y2Ti2O7; Pyrochlore; Bi3+; Charge transfer luminescence; BI3+ LUMINESCENCE; F-7(1) LEVEL; IONS; Y2SN2O7; CONFIGURATION; DEPENDENCE; BISMUTH; SOLIDS; SN4+; LU3+;

D O I：

10.1016/j.optmat.2015.07.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the low temperature (15-300 K) spectroscopic properties of Bi3+ impurities in the pyrochlore Y2Ti2O7. The spectroscopic properties of Y2Ti2O7:Bi3+ are interpreted on the basis of the Bi3+(6s)-Ti4+(4d(0)) metal-to-metal charge transfer transition that is caused because the Bi3+ S-1(0) ground state (6s(2)) energy occurs at about 0.40 eV from the top of the O2- 2p band (valence band). The reason for the low quenching temperature of the charge transfer luminescence is established. A comparative study of the Bi3+ luminescence in the pyrochlores Y2Ti2O7, Y2Sn2O7 and La2Zr2O7 is presented. The Bi3+ S-1(0) ground state (6s(2)) energy is located about 0.46 eV from the top of the 0(2-) 2p band in La2Zr2O7. (C) 2015 Published by Elsevier B.V.

引用

页码：31 / 35

页数：5

共 34 条

[1] Photocatalytic activity of R3MO7 and R2Ti2O7 (R = Y, Gd, La;: M = Nb, Ta) for water splitting into H2 and O2 [J].