کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11001683 | 1007993 | 2019 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tb3+/Eu3+ co-doped silica xerogels prepared via low-temperature sol-gel method and their luminescence properties
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Silica xerogels doubly-doped with Eu3+ and Tb3+ ions were prepared via low-temperature sol-gel method. The structural properties were determined based on X-ray diffraction analysis. The optical properties were studied based on excitation and emission spectra as well as luminescence decay analysis and the Tb3+â¯ââ¯Eu3+ energy transfer was registered. Upon direct excitation of Tb3+ ions the characteristic transitions from the 5D4 state of Tb3+ and from the 5D0 state of Eu3+ were registered. This is a direct proof that energy transfer from Tb3+ to Eu3+ in silica xerogels was occurred. Furthermore, the luminescence decay analysis from the 5D0 excited states of Eu3+ upon excitation of Tb3+ at λexcâ¯=â¯351â¯nm wavelength were also carried out. The luminescence lifetime from the 5D0 state of Eu3+ after excitation at 351â¯nm is long-lived in comparison to excitation at 393â¯nm and increased by 24%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 235, 15 January 2019, Pages 101-103
Journal: Materials Letters - Volume 235, 15 January 2019, Pages 101-103
نویسندگان
Barbara Szpikowska-Sroka, Natalia Pawlik, Maria BaÅczyk, Wojciech A. Pisarski,