Narrow Energy Gap between Triplet and Singlet Excited States of Sn2+ in Borate Glass

Transparent inorganic luminescent materials have attracted considerable scientific and industrial attention recently because of their high chemical durability and formability. However, photoluminescence dynamics of ns 2 -type ions in oxide glasses has not been well examined, even though they can exh...

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Bibliographic Details
Published in:Scientific reports 2013-12, Vol.3 (1), p.3541-3541, Article 3541
Main Authors: Masai, Hirokazu, Yamada, Yasuhiro, Suzuki, Yuto, Teramura, Kentaro, Kanemitsu, Yoshihiko, Yoko, Toshinobu
Format: Article
Language:English
Subjects:
639/301/1019
639/624/399
Crystals
Efficiency
Emissions
Energy
Humanities and Social Sciences
Light emitting diodes
Luminescence
multidisciplinary
Optics
Photons
Science
Strontium
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Summary:Transparent inorganic luminescent materials have attracted considerable scientific and industrial attention recently because of their high chemical durability and formability. However, photoluminescence dynamics of ns 2 -type ions in oxide glasses has not been well examined, even though they can exhibit high quantum efficiency. We report on the emission property of Sn 2+ -doped strontium borate glasses. Photoluminescence dynamics studies show that the peak energy of the emission spectrum changes with time because of site distribution of emission centre in glass. It is also found that the emission decay of the present glass consists of two processes: a faster S 1 - S 0 transition and a slower T 1 - S 0 relaxation and also that the energy difference between T 1 and S 1 states was found to be much smaller than that of (Sn, Sr)B 6 O 10 crystals. We emphasize that the narrow energy gap between the S 1 and T 1 states provides the glass phosphor a high quantum efficiency, comparable to commercial crystalline phosphors.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep03541