Steady state and time-resolved photoluminescence properties of alternating polyfluorene copolymers

被引：3

作者：

Charas, A

Morgado, J

Alcácer, L

Martinho, JMG

Cacialli, F

机构：

[1] Inst Super Tecn, Inst Engn Quim, P-1049001 Lisbon, Portugal

[2] Inst Super Tecn, Inst Telecomunicacoes, P-1049001 Lisbon, Portugal

[3] UCL, Dept Phys, London WC1E 6BT, England

[4] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

SYNTHETIC METALS | 2003年 / 135卷 / 1-3期

关键词：

photoluminescence; time-resolved spectroscopy;

D O I：

10.1016/S0379-6779(02)00627-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present the photoluminescence properties of two alternating copolymers combining 9,9-di(2'-ethylhexyl)fluorene with a phenylene or a thiophene comonomer, in cyclohexane solution. Their picosecond time-resolved fluorescence decay is fitted to three exponential components. We associate the faster component to a relaxation of the exciton electronic energy and the two slower components to exciton decay at two distinct sites, which we tentatively identify as the central parts of the polymer chains and the chain ends, in view of the relatively short chain lengths.

引用

页码：387 / 388

页数：2

共 5 条

[1] Use of picosecond fluorescence dynamics as an indicator of exciton motion in conjugated polymers: Dependence on chemical structure and temperature [J].