کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1331753 979015 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation of luminescence and optical absorption of K2LiAlF6:Cr3+ single crystals
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Investigation of luminescence and optical absorption of K2LiAlF6:Cr3+ single crystals
چکیده انگلیسی

Photoluminescence, absorption and excitation spectra of K2LiAlF6 single crystals doped with 1% of Cr3+ are presented. The near-infrared photoluminescence observed at room temperature, 77 and 4 K are attributed to the zero-phonon spin-allowed 4T2(4F)→4A2(4F) transition of Cr3+ octahedrally coordinated by F− ions. Lifetimes are obtained. The 4 K emission broad band was described in terms of normal modes of the octahedral complex [CrF6]3−. The Racah, crystal-field and Huang–Rhys parameters are calculated and the quantum efficiency and thermal quenching estimated and compared with Cr3+ properties in different environments.

Photoluminescence spectra of K2LiAlF6 doped with 1.0 at% Cr3+ at: (a) room temperature (300 K), (b) 77 K and (c) 4 K.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 179, Issue 12, December 2006, Pages 3718–3723
نویسندگان
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