کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1496362 | 992961 | 2009 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation, structure analysis and photoluminescence properties of MgGa2O4:Mn2+
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
In this work the photoluminescence and excitation spectra at room temperature of the spinel-type MgGa2O4 with 0.5% and 10.0% of Mn2+ have been studied. The polycrystalline samples were synthesized by standard solid-state reaction methods at high temperature. The photoluminescence spectra exhibit green and red emissions for both samples, attributed to 4T1(4G) → 6A1(6S) transition of Mn2+ ion in tetrahedral and octahedral sites of oxygen, respectively. The excitation spectra exhibit features unambiguously assigned to d–d transitions of Mn2+ in those kinds of sites. From the excitation spectra and Tanabe–Sugano matrices the crystal field Dq and Racah B parameters were obtained.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 31, Issue 11, September 2009, Pages 1620–1627
Journal: Optical Materials - Volume 31, Issue 11, September 2009, Pages 1620–1627
نویسندگان
G.K.B. Costa, S.S. Pedro, I.C.S. Carvalho, L.P. Sosman,