کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5403433 | 1392759 | 2008 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quantifying the contributions of inner-filter, re-absorption and aggregation effects in the photoluminescence of high-concentration conjugated polymer solutions
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
The optical properties of high-concentration solutions of conjugated molecules are dominated by inner-filter and re-absorption effects. We apply a simple model to isolate the contributions from these phenomena to the non-linearity of the observed photoluminescence (PL) intensity with concentration. Poly(9,9-dioctylflourene) (PFO) solutions were studied across a range of concentrations and in a number of different solvents. The model accurately predicts the behaviour of PFO in good solvents up to concentrations above 0.1 mg/ml. In solutions of PFO in poor solvents and at high concentrations where we find a significant amount of β-phase PFO present the model is less accurate. We attribute the difference between predicted PL behaviour and that observed to non-radiative energy transfer from the bulk “glassy” phase PFO to the β-phase PFO.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 128, Issue 1, January 2008, Pages 31-40
Journal: Journal of Luminescence - Volume 128, Issue 1, January 2008, Pages 31-40
نویسندگان
D. Rickard, S. Giordani, W.J. Blau, J.N. Coleman,