Regioregularity Increases Second-Order Nonlinear Optical Response of Polythiophenes in Solution

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• 作者：Steven Deckers ; Joost Steverlynck ; Pieter Willot ; Stefaan Vandendriessche ; Guy Koeckelberghs ; Inge Asselberghs ; Thierry Verbiest ; Monique A. van der Veen
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：August 13, 2015
• 年：2015
• 卷：119
• 期：32
• 页码：18513-18517
• 全文大小：254K
• ISSN：1932-7455

文摘

The influence of the regioregularity on the second-order nonlinear optical response of polythiophenes in solution was investigated. A series of chiral poly((S)-3,7- dimethyloctylthiophene)s with varying degrees of regioregularity from 54 to 100% were studied. To a large extent, the changes in second-order nonlinear optical properties with varying degree of regioregularity are caused by electronic effects. More specifically, the second-order nonlinear optical response increases with increasing regioregularity, as this corresponds to a rising conjugation length. However, a regioregularity of 80% suffices for a maximized second-order nonlinear optical response.