کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10624110 989583 2016 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of Sr/Ca substitution on phase structure and photoluminescence properties of micro-SrxCa1−xAlSiN3: Eu2+ phosphor for high CRI white LEDs
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Effect of Sr/Ca substitution on phase structure and photoluminescence properties of micro-SrxCa1−xAlSiN3: Eu2+ phosphor for high CRI white LEDs
چکیده انگلیسی
SrxCa1−xAlSiN3: Eu2+ phosphors were prepared by using the high temperature solid state reaction in a 1.1 Mpa N2 atmosphere. The phase structures, photoluminescence (PL) properties, and chromaticity properties of the phosphors affected by Sr/Ca Substitution have been investigated in detail. With increasing Sr content (x value), the crystal grain became bigger and the average grain size increased from 5 µm to 10 µm. PL emission bands of SrxCa1−xAlSiN3: Eu2+ showed a blue-shift from 660 (x=0) to 617 nm (x=0.8), the shoulder of the excitation spectra around 550 nm showed a slightly blue-shift and decay lifetime shortened from 776.96 (x=0.2) to 642.35 ns (x=0.8). Both the emission and excitation intensity of peak position increased with Sr content increased. The ideal white light with high CRI (Ra>88) can be obtained by mixing the SrxCa1−xAlSiN3: Eu2+ phosphors and commercial green phosphors with appropriate proportion of the components.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 42, Issue 13, October 2016, Pages 14956-14962
نویسندگان
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