کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7223873 1470563 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Green emission from Tb3+-doped CaLaAl3O7 phosphor - A photoluminescence study
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Green emission from Tb3+-doped CaLaAl3O7 phosphor - A photoluminescence study
چکیده انگلیسی
A series of Tb3+-doped CaLaAl3O7 phosphors were successfully synthesized via a sol-gel method. The formation of the synthesized phosphors was confirmed using X-ray powder diffraction (XRPD) studies. A scanning electron microscope (SEM) was used to characterize the surface morphology and to investigate the photoluminescence behaviors in detail. Under the excitation of 235 nm, the emission spectrum consists of the characteristic Tb3+ transitions that mainly peak at 543 nm and correspond to the 5D4 → 7F5 transition. The intensity was greatly improved due to the Tb3+ concentration in the present phosphors. The optimum Tb3+-doping concentration was determined to be 0.05 mol. The chromaticity coordinates of the CaLaAl3O7:Tb3+ were fixed to make it tunable for the blue-to-green region. The typical photographs of the CaLaAl3O7:Tb3+ under a 254-nm UV light revealed an intense-green powder. The results showed that this kind of phosphor is potentially applicable in terms of UV-excited white LEDs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optik - Volume 164, July 2018, Pages 407-413
نویسندگان
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