期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 265, 期 1-2, 页码 61-67出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0022-3093(99)00684-5
关键词
-
kinds of SiO2 were prepared by the usual sol-gel process (heat-treated sample) or a sol-gel process using photoirradiation (photoirradiated sample) and their photoluminescence behaviors were investigated. All heat-treated samples had photoluminescence bands, but none of the photoirradiated samples did. Intensity of emission of heat-treated sample increased as the treatment temperature increased. This photoluminescence behavior occurred reversibly with thermal treatment and photoirradiation. The network structure of SiO2 samples were evaluated by solid slate NMR. The intensity of O-17 solid state NMR peak increased with increased emission intensity. These results implied that heat-treated samples included some defects which showed photosensitivity, but the photoirradiated samples lacked such defects and formed a rigid network structure instead. These defects caused the observed photoluminescence. (C) 2000 Elsevier Science B.V. All rights reserved.
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