کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1815487 | 1525244 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ca(La1âxEux)4Si3O13 red emitting phosphor for white light emitting diodes
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
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چکیده انگلیسی
Series of Ca(La1âxEux)4Si3O13 red emitting phosphor were synthesized by solid-state reaction method. Photoluminescence excitation and emission spectra showed that the phosphors could be efficiently excited by near ultraviolet to blue light from 350 to 470Â nm to give bright red emission. There were four emission bands peaking at 591, 615, 655, and 700Â nm, due to the transition of the Eu3+ (5D0â7Fj (j=0, 1,2,3,4)), respectively. After using the 3.5% Li2CO3 as the flux, the sample's emission intensity increased obviously. White LED was obtained by combining blue LED chip (InGaN-based 460Â nm emitting) with Ca(La1âxEux)4Si3O13 and YAG:Ce3+. As the x has the value of 0.5, the InGaN-based Ca(La0.5Eu0.5)4Si3O13 WLED presented intense white emitting and good color rendering of over 89.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 404, Issues 8â11, 1 May 2009, Pages 1481-1484
Journal: Physica B: Condensed Matter - Volume 404, Issues 8â11, 1 May 2009, Pages 1481-1484
نویسندگان
Changyu Shen, Yi Yang, Shongzhong Jin, Jiangzhou Ming, Huajun Feng, Zhihai Xu,