کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7888787 | 1509796 | 2018 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
First-principles calculation on the electronic structure and optical properties of Eu2+ doped γ-AlON phosphor
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The crystal structure, electronic structure, and optical properties of Eu-doped γ-AlON at various Eu concentrations were obtained from density functional theory. Based on the calculated results, the luminescence properties and mechanism of Eu-doped γ-AlON are discussed. The calculated results demonstrate that AlON:Eu2+ phosphor exhibits a direct band gap, which is advantageous for luminescence. The absorption spectrum of AlON:Eu2+ phosphor has a single intense broad absorption band from 275 to 425 nm with a peak at 355 nm, which is consistent with corresponding experimental excitation spectra. The existence of EuâN bonds enhanced the local covalence of Eu2+, hence the optical stability of AlON:Eu2+ phosphor.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 2, 1 February 2018, Pages 1461-1466
Journal: Ceramics International - Volume 44, Issue 2, 1 February 2018, Pages 1461-1466
نویسندگان
Xian Zhang, Zhao Li, Qingfeng Zeng,