Defect reduction in SrTiO3 by Al addition

被引：20
|
作者：
Okamoto, S
Tanaka, S
Yamamoto, H
机构：
[1] Tokyo Univ Technol, Fac Engn, Hachioji, Tokyo 1928580, Japan
[2] Tottori Univ, Fac Engn, Dept Elect & Elect Engn, Tottori 6808552, Japan
来源：
JOURNAL OF LUMINESCENCE | 2000年 / 87-9卷
基金：
日本学术振兴会;
关键词：
FED phosphor; SrTiO3; planar faults; Ruddlesden-Popper phases;
D O I：
10.1016/S0022-2313(99)00300-2
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Defect-reduction process in SrTiO3 by Al addition has been investigated by using high-resolution transmission electron microscope (HRTEM) images, X-ray diffraction (XRD) patterns and photoluminescence (PL) spectra. HRTEM images in SrTiO3 : Pr3+ show the reduction of planar faults by Al addition. The planar faults are probably SrO thin layers. In Eu-doped SrTiO3 reduced by firing in hydrogen atmosphere, Ruddlesden-Popper phases Srn+1TinO3n+1 (n = 1, 2,..., infinity) are precipitated in SrTiO3, as confirmed by XRD patterns. Srn+1TinO3n+1 consists of a SrO planar fault interleaved with SrTiO3 slabs. With Al addition, the planar faults cannot be easily formed. Instead, strontium aluminates, SrAl2O4 or/and SrAl12O19, as well as SrTiO3 are precipitated, as a result of scavenging the SrO planar faults by added Al. The precipitation is confirmed also by PL from Eu2+ in the strontium aluminates. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：577 / 579
页数：3
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