共轭电致发光聚合物中光生极化子的ESR观察

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI:10.1080/10587250108024712

S. Kuroda, K. Marumoto, Hideki Ito, N. Greenham, R. Friend, Y. Shimoi, S. Abe

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引用次数: 3

摘要

摘要利用光诱导ESR (LESR)研究了聚对苯基乙烯基(PPV)的两种二氧基衍生物MEH-PPV和CN-PPV的光生极化子。与MEH-PPV和先前报道的PPV相比，在CN-PPV中观察到LESR线宽明显减少，这直接证明极化子自旋密度主要存在于乙烯基位点上。这一特征可以通过基于理论的极化子自旋分布的线宽分析再现。

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ESR Observation of Optically-Generated Polarons in Conjugated Electroluminescent Polymers

Abstract Light-induced ESR (LESR) has been employed to study optically-generated polarons in two dialkoxy derivatives of poly(p-phenylene vinylene) (PPV), MEH-PPV and CN-PPV. A clear reduction of LESR linewidth is observed in CN-PPV compared with MEH-PPV and also with PPV previously reported, providing direct evidence that the polaron spin density predominantly reside on vinyl sites. This feature can be reproduced by the linewidth analysis based on a theoretical spin distribution of a polaron extending over approximately 4 phenyl rings.

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来源期刊

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals

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