Dynamics of Forster transfer in polyfluorene-based polymer blends and Langmuir-Blodgett nanostructures

被引：28

作者：

Hill, J

Heriot, SY

Worsfold, O

Richardson, TH

Fox, AM ^{[1
]}

Bradley, DDC

机构：

[1] Univ Sheffield, Dept Phys & Astron, Sheffield, S Yorkshire, England

[2] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London, England

来源：

SYNTHETIC METALS | 2003年 / 139卷 / 03期

关键词：

time-resolved photoluminescence; energy transfer; polyfluorene; blend; Langmuir-Blodgett film;

D O I：

10.1016/S0379-6779(03)00283-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the Forster transfer dynamics in spin-cast polyfluorene blends and Langmuir-Blodgett (LB) nanostructures by time-resolved photoluminescence (PL) spectroscopy. The blend system consisted of poly(9,9-dioctylfluorene) (F8) as the host and poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) as the guest. In the spin-cast films we find evidence for phase separation at high F8BT concentrations. In the LB nanostructures, the host-guest separation is precisely controlled by optically-inert monolayer spacers of stearic acid. This permits a quantitative analysis of the Forster transfer dynamics, from which we deduce a value of 38 +/- 7 Angstrom for the Forster radius of the F8-F8BT system, in agreement with the predictions based on spectral overlap calculations. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：787 / 790

页数：4

共 14 条

[1] The effect of morphology on the temperature-dependent photoluminescence quantum efficiency of the conjugated polymer poly(9, 9-dioctylfluorene) [J].