期刊
MATERIALS RESEARCH BULLETIN
卷 37, 期 8, 页码 1443-1449出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0025-5408(02)00787-0
关键词
glasses; ceramics; defects; luminescence
Multi-color LLP phenomenon was observed in Mn2+-doped ZnO-B2O3-SiO2 glassceramics after the irradiation of a UV lamp at room temperature. Transparent ZnO-B2O3-SiO2 glass emitted reddish LLP while opaque glass-ceramics prepared by the glass sample after heat treatment emitted yellowish or greenish LLP. The change of the phosphorescence is due to the alteration of co-ordination state of Mn2+. The phosphorescence of the samples was seen in the dark with naked eyes even 12 h after the irradiation with a UV lamp (lambda(max) = 254 nm) for 30 min. Based on the approximative t(-1) decay law of the phosphorescence, we suggest that the LLP is attributed to the thermally assisted electron-hole recombination. (C) 2002 Elsevier Science Ltd. All rights reserved.
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