کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5400323 1505914 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Concentration quenching and photostability in Eu(dbm)3phen embedded in mesoporous silica nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Concentration quenching and photostability in Eu(dbm)3phen embedded in mesoporous silica nanoparticles
چکیده انگلیسی
Ordered mesoporous silica nanoparticles (MSNs) were impregnated with different loadings of the luminescent complex tris(dibenzoylmethane) mono(1,10-phenanthroline)europium(III) (Eu(dbm)3phen), with the aim of increasing the luminescence by avoiding concentration quenching and having mainly in mind the application as spectral converter for multi-crystalline silicon solar cells. The morphological, structural and luminescence properties of the impregnated silica nanoparticles were characterized by N2 physisorption, X-ray diffraction, transmission electron microscopy, infrared spectroscopy, UV-visible spectroscopy and photoluminescence excitation and emission measurements. Photostability was tested under 1 sun (1000 W/m2) illumination for 24 h and the related effects were inspected by UV-visible and photoluminescence spectroscopies. Impregnation of the complex into 50-70 nm MSNs with pore size tailored around 2.9 nm depressed concentration quenching and allowed the use of complex loadings as high as 23 wt%. Sunlight irradiation caused a marked increase in the luminescence intensity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 146, February 2014, Pages 178-185
نویسندگان
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