INFLUENCE OF DEFECTS ON THE LUMINESCENCE QUANTUM YIELD OF Y1.94EU0.06O3

被引：46

作者：

VANSCHAIK, W

BLASSE, G

机构：

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

来源：

CHEMISTRY OF MATERIALS | 1992年 / 4卷 / 02期

关键词：

D O I：

10.1021/cm00020a033

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 influence of defects on the luminescence quantum yield of Y1.94Eu0.06O3 is reported. A decrease of the quantum yield for 254-nm excitation is due to competitive absorption by defects. The presence of interstitial oxygen also leads to competitive absorption and hence to a decrease of the quantum yield for 254-nm excitation. Upon host lattice excitation energy transfer to interstitial oxygen competes with energy transfer to the Eu3+ ions and decreases the quantum yield for 185-nm excitation. Codoping with transition-metal ions results in strong competitive absorption and hence in a strong decrease of the quantum yield. Codoping with Tb and Ce leads to a decrease of the quantum yield due to competitive absorption by the tetravalent state of these ions.

引用

页码：410 / 415

页数：6

共 36 条

[1] LUMINESCENCE OF INORGANIC SOLIDS - FROM ISOLATED CENTERS TO CONCENTRATED SYSTEMS [J].