Intra-chain triplet-triplet annihilation and delayed fluorescence in soluble conjugated polymers

被引：39

作者：

Monkman, AP

Burrows, HD

Hamblett, I

Navaratnam, S

机构：

[1] Univ Durham, Dept Phys, Organ Electroact Mat Res Grp, Durham DH1 3LE, England

[2] NE Wales Inst, Multidisciplinary Res & Innovat Ctr, Wrexham LL11 2AW, Wales

[3] Univ Manchester, Dept Chem, Manchester M13 9PL, Lancs, England

[4] Univ Coimbra, Dept Chem, P-3049 Coimbra, Portugal

来源：

CHEMICAL PHYSICS LETTERS | 2001年 / 340卷 / 5-6期

关键词：

D O I：

10.1016/S0009-2614(01)00442-0

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：

Pulse radiolysis has been used to generate high triplet populations on isolated conjugated polymer chains in benzene solutions. This allows direct observation of delayed fluorescence (DF) arising from intramolecular triplet-triplet annihilation (TTA). In poly(2-methoxy,5-(2 ' -ethyl-hexyloxy)-p-phenylenevinylene) the triplet lifetime at low triplet concentration is 90 mus which decreases to 15 mus as the number of triplets saturates at ca. 30 triplets per chain. Analysis of the DF kinetics gives an upper limit of 1.5% for the number of triplets that contribute to TTA. We also observed DF in a range of other conjugated polymers. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：467 / 472

页数：6

共 25 条

[1] Highly efficient phosphorescent emission from organic electroluminescent devices [J].