کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1495427 992935 2012 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study on multiple near-infrared luminescent centers and effects of aluminum ions in Bi2O3–GeO2 glass system
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Study on multiple near-infrared luminescent centers and effects of aluminum ions in Bi2O3–GeO2 glass system
چکیده انگلیسی

We report on the near-infrared (NIR) luminescent properties of Bi2O3–GeO2 glass. Apparent differences of NIR luminescence, decay properties and thermal stability manifest the co-existence of more than one active center in this system. The effects of Al ions introduced both unintentionally and intentionally were investigated. 27Al NMR analysis proposes 4-fold Al coordination as dominant structure which can also provide the environment for active centers. We suggest that Al ions play a crucial role to restrain concentration quenching at higher Bi2O3 concentration instead of assisting to construct Bi centers.


► Different behaviors of multiple NIR emission centers were investigated.
► The effects of Al ions depend on the composition of Bi2O3–GeO2 glass.
► Al ions help to restrain concentration quenching at higher Bi2O3 concentration.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 34, Issue 4, February 2012, Pages 675–678
نویسندگان
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