کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5403127 | 1392752 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Blue light emission from Eu2+ ions in sol-gel-derived Al2O3-SiO2 glasses
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
Blue light-emitting glasses were successfully prepared by doping Eu2+ ions in the system Al2O3-SiO2. The Al2O3-SiO2 glasses doped with Eu3+ ions were synthesized using a sol-gel method, followed by heating in hydrogen gas atmosphere to reduce into the Eu2+ ions. The obtained glasses exhibited emission spectra with peak at â¼450 nm due to 4f65dâ4f7 (8S7/2) transition, the intensities of which strongly changed depending on their glass composition and heating conditions. The emission quantum efficiency of 48% was achieved by heating the glass with the ratio of Al3+ to Eu3+ at about 6 at 1000 °C in hydrogen gas atmosphere. It was found that the Al2O3-SiO2 glasses were appropriate not only for homogeneously doping the Eu3+ ions in glass structure but also reducing to Eu2+ ions, resulting in enhanced blue light-emission properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 129, Issue 9, September 2009, Pages 1055-1059
Journal: Journal of Luminescence - Volume 129, Issue 9, September 2009, Pages 1055-1059
نویسندگان
Yukari Kishimoto, Xiaoting Zhang, Tomokatsu Hayakawa, Masayuki Nogami,