期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 385, 期 -, 页码 136-141出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2013.11.019
关键词
PbSe quantum dots; Glass ceramics; Broad-band photoluminescence; Dual-band photoluminescence; Quantum confinement effect
资金
- Fundamental Research Funds for the Central Universities of China [WUT: 2012-IV-022, 2013-II-010]
- Natural Science Foundation of Hubei Province [2012FFA024]
- National Natural Science Foundation of China [51202170]
- Chutian Scholar Program of Hubei Province
- Nippon Sheet Glass Foundation for Materials Science and Engineering
In this work, PbSe QDs were precipitated in oxyfluoride glass-ceramics containing BaF2 nanocrystals. Tunable and broad absorption and photoluminescence from PbSe QDs doped glass-ceramics were observed in the near-infrared wavelength range. When the glasses were heat-treated at temperatures below 560 degrees C using one-step heat-treatment schedule, single photoluminescence band was observed from each sample. Upon high temperature (560 degrees C or 570 degrees C) one-step or two-step heat-treatment, dual-band photoluminescence was observed. These two photoluminescence bands in each spectrum were separated by a gap of similar to 110-150 meV, and as a result, effective full width at half maximum as large as (sic)500 nm was recorded. (C) 2013 Elsevier B.V. All rights reserved.
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