期刊
SYNTHETIC METALS
卷 159, 期 11, 页码 1024-1027出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2009.01.026
关键词
Alkylating agent; Conjugated polymer; Polaron
资金
- Israel Science Foundation [ISF 745/08]
- European Community Marie Curie Actions
- Marie Curie Research Training Network [35859]
We report on the effect of an alkylating agent sensing of a nucleophilic unit, Pyridine-Thiophene (PyTh), on the polaron recombination in a co-polymer [Poly(3-hexylthiophene)](n)(PyTh)(m)(m approximate to 0.025n). We show that by exposing the co-polymer to an alkylating agent, such as methyl iodide, the recombination rate increases substantially, possibly due to the introduction of additional recombination pathways created by the charge transfer between the electron deficient alkylated pyridinium sites and the electron rich thiophene polymer backbone. We also establish the bi-molecular-dispersive nature of the polaron recombination mechanism by following the modulation frequency and excitation intensity dependencies of the polaron photoinduced absorption. (C) 2008 Elsevier B.V. All rights reserved.
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