期刊
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
卷 252, 期 6, 页码 1394-1401出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.201451630
关键词
annealing; F+ center; GGAG; scintillator; valence state
GGAG:Ce crystals with various Ca concentrations were grown by the Czochralski technique. The introduction of Ca2+ ions into a trivalent site results in a change in the Ce valence state as well as an additional F+ luminescence center. The changes of Ce valence state could be affected by various annealing atmospheres and were investigated via measuring the Ce3+ absorbance and observing the color change of the sample. Photoluminescence spectra and photoluminescence decay were used to reveal the occurrence of F+ center related to the oxygen vacancies during the annealing. A redox mechanism and a charge compensation process are proposed to explain the change in Ce state charge and F+ center during the annealing. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据