Energy transfer dynamics in polyfluorene-based polymer blends

被引：132
|
作者：
Buckley, AR [1 ]
Rahn, MD [1 ]
Hill, J [1 ]
Cabanillas-Gonzalez, J [1 ]
Fox, AM [1 ]
Bradley, DDC [1 ]
机构：
[1] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England
来源：
CHEMICAL PHYSICS LETTERS | 2001年 / 339卷 / 5-6期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1016/S0009-2614(01)00359-1
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The Forster energy transfer mechanisms in polyfluorene-based polymer blends have been investigated by picosecond time-resolved photoluminescence spectroscopy. Blends of poly(9,9-dioctylfluorene), (F8), and poly(9,9-dioctylfluoreneco-benzothiadiazole), (BT), ranging from 50% to 0.01% BT have been investigated from room temperature down to 12 K. In high concentration BT/F8 films, nearest neighbour transfers from F8 to BT, characterised by an F8 fluorescence lifetime of 12 ps, totally dominate. In low concentration BT/E8 films energy transfer between F8 and BT still occurs at nearest neighbour sites, but exciton migration to these sites amongst F8 chain segments now also contributes to the measured dynamics. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：331 / 336
页数：6
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