کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1562569 | 999590 | 2010 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
First-principles calculation and luminescence property of Eux:Si5Al1−xO1+xN7−x green phosphor
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The crystal and electronic structure of Eu doped β-SiAlON with various Eu concentrations was calculated by the density functional theory and compared to their luminescence properties. Interstitially doped Eu ion was found near N atoms in the atomic channel paralleled to the [0 0 0 1] axis and the Eu–N distance shortens as Eu concentration increases. The additional states originated from the hybridization of Eu-4f with Si-3p and N-2p. The calculated wavelengths from the energy gap between VBM and extra level were 522.7 and 544.8 nm in the low Eu concentration regions. The calculated results are well agreed with experimental results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 49, Issue 4, Supplement, October 2010, Pages S359–S363
Journal: Computational Materials Science - Volume 49, Issue 4, Supplement, October 2010, Pages S359–S363
نویسندگان
Chan-Yeup Chung, Jeong Ho Ryu, Dong Su Yoo, Sung-Ho Lee, Yong-Chae Chung,