期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 354, 期 12-13, 页码 1382-1385出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2006.10.088
关键词
optical properties; luminescence; oxide glasses; silicates
Photoluminescence of undoped and B-doped ZnO in silicate glasses was investigated by varying the concentration of ZnO (3550 mol%) and B dopant (0-10 mol%) in the glass matrices. The broad and intense near band edge emissions were observed while the visible light emission was very weak. UV luminescence in all samples was red-shifted relative to the exciton transition in bulk ZnO and enhanced by decreased ZnO concentration due to higher degree of structural integrity and the lower aggregation degree of ZnO. Donor B dopant played the double roles of filling conduction bands to broaden band gap when its concentration was lower than 5 mol%, and emerging with conduction bands to narrow the gap when B dopant exceeded this value. (c) 2007 Elsevier B.V. All rights reserved.
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