Role of intermolecular coupling in the photophysics of disordered organic semiconductors: Aggregate emission in regioregular polythiophene
Role of intermolecular coupling in the photophysics of disordered organic semiconductors: Aggregate emission in regioregular polythiophene
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DOI：
10.1103/physrevlett.98.206406
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发表时间：
2007-05-18
影响因子：
8.6
通讯作者：
Spano, Frank C.
中科院分区：
文献类型：
--
作者：
Clark, Jenny;Silva, Carlos;Spano, Frank C.
我们解决的激子耦合的性质上的光激发的共轭聚合物区域规则的聚（3-己基噻吩）的作用。通过温度依赖的吸收和光致发光光谱，我们表明，光学发射是压倒性的弱耦合H聚集体为主。0-0和0-1的振动峰的相对吸光度提供了一个强大的简单的手段来提取的分子间的耦合能量的大小，约5和30毫电子伏的薄膜纺从异均四甲苯和氯仿溶液，分别。
We address the role of excitonic coupling on the nature of photoexcitations in the conjugated polymer regioregular poly(3-hexylthiophene). By means of temperature-dependent absorption and photoluminescence spectroscopy, we show that optical emission is overwhelmingly dominated by weakly coupled H aggregates. The relative absorbance of the 0-0 and 0-1 vibronic peaks provides a powerfully simple means to extract the magnitude of the intermolecular coupling energy, of approximately 5 and 30 meV for films spun from isodurene and chloroform solutions, respectively.