文章基本信息

标题：Narrow Energy Gap between Triplet and Singlet Excited States of Sn²⁺ in Borate Glass
本地全文：下载
作者：Hirokazu Masai ; Yasuhiro Yamada ; Yuto Suzuki 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2013
卷号：3
DOI：10.1038/srep03541
出版社：Springer Nature
摘要：Transparent inorganic luminescent materials have attracted considerable scientific and industrial attention recently because of their high chemical durability and formability. However, photoluminescence dynamics of ns²-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 Sn²⁺-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)B₆O₁₀ 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.