LUMINESCENCE OF PB-2+ IN SRTIO3

被引：48

作者：

FOLKERTS, HF

BLASSE, G

机构：

[1] Debye Institute, University Utrecht, 3508 TA Utrecht

来源：

CHEMISTRY OF MATERIALS | 1994年 / 6卷 / 07期

关键词：

D O I：

10.1021/cm00043a018

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The luminescence of Sr1-xPbxTiO3 powder samples is reported for several values of x. In all cases, except x = 1, the self-trapped exciton (STE) emission of SrTiO3 is accompanied by an overlapping emission band at lower energy due to a center involving Pb2+. The relative emission intensities of these individual bands vary with temperature and Pb2+ concentration. The bandgap energy is decreased in the samples doped with 50% and 100% Pb2+, which is explained by the increased Pb2+ wave-function overlap. It is concluded that the luminescence due to Pb2+ centers involves decay from conduction band levels to the ground level of Pb2+. This level appears to be situated just above the valence band. A broad-band luminescence of the same origin is found in PbTiO3. In addition, evidence for free exciton emission is observed.

引用

页码：969 / 972

页数：4

共 10 条

[1] X-RAY-INDUCED PROCESSES IN SRTIO3 [J].