کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1491449 | 992351 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Luminescence properties of Ca1âxSrxSe:Ce phosphors and their potential application for GaN-based LEDs
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A series of solid solution phosphors Ca1âxSrxSe:0.02Ce3+ were prepared using high-temperature solid-state reaction technique. Their diffuse reflectance and luminescent spectra at room temperature were investigated and discussed. The optical band gap Eg energies of CaSe and SrSe were derived. Because of its broad band absorption in the range of 400-500Â nm, Ca1âxSrxSe:Ce3+ can suit the application requirements for GaN-based light-emitting diodes (LEDs). The emission wavelength and the coordinates systematic shift from yellowish green to bluish green with an increase in x of Ca1âxSrxSe:Ce3+. Using Dorenbos's empirical equation, the values of energies of the lowest f-d transition absorption E, redshift D and Stokes shift ÎS for Eu2+ in the same host were predicted. The results were in good agreement with the experimental data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 44, Issue 5, 6 May 2009, Pages 1093-1096
Journal: Materials Research Bulletin - Volume 44, Issue 5, 6 May 2009, Pages 1093-1096
نویسندگان
Jianhui Zhang, Jing Wang, Ruijin Yu, Haibin Yuan, Qiang Su,