Role of nematic order in conjugated polymer spectroscopy

M. J. Winokur; H. Cheun; M. KnaapilaA. P. MonkmanU. Scherf

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Role of nematic order in conjugated polymer spectroscopy

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摘要

We present a rigorous method for assessing the influence of nematic microdomains within conjugated polymer (CP) thin films on CP optical spectroscopy. Nematic alignment, a characteristic widely seen in these optically active polymers, creates an environment in which overlap between the chromophore absorption and emission bands can lead to large scale self-absorption of the π-π~* emission band even in moderately thin films. This nematic order also affects simple absorption measurements. Steady-state optical emission and absorption measurements of the blue emitting polymer polybis(2-ethylhexyl)fluorene are used to demonstrate the impact of these effects.

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《Physical review, B. Condensed matter and materials physics》 |2007年第11期|113202.1-113202.4|共9页
作者
M. J. Winokur; H. Cheun; M. KnaapilaA. P. MonkmanU. Scherf;
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Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA;

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正文语种英语
中图分类固体物理学;
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optical properties of low-dimensional; mesoscopic; and nanoscale materials and structures; photoluminescence; properties and materials; absorption and reflection spectra: visible and ultraviolet; polymer liquid crystals;

Role of nematic order in conjugated polymer spectroscopy

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