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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >Structure-property relationships in multifunctional thieno(bis)imide-based semiconductors with different sized and shaped N-alkyl ends
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Structure-property relationships in multifunctional thieno(bis)imide-based semiconductors with different sized and shaped N-alkyl ends

机译：具有不同尺寸和形状的N-烷基末端的多功能基于噻吩（双）酰亚胺的半导体中的结构-性质关系

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摘要

The relationships between the molecular structure, packing modalities, charge mobility and light emission in organic thin films is a highly debated and controversial issue, with both fundamental and technological implications in the field of organic optoelectronics. Thieno(bis)imide (TBI) based molecular, semiconductors provide an interesting combination of good processability, tunable self-assembly, ambipolar charge transport and electroluminescence, and are therefore an ideal test base for fundamental studies on the structure-property correlation in multifunctional molecular systems. Herein, we introduce a new class of thieno(bis)imide quaterthiophenes having alkyl side chains of different shapes (linear, cyclic, branched) and lengths (C1-C8). We found that contrarily to what is generally observed in most molecular semiconductors, the length of the alkyl substituent does not affect the optical, self-assembly and charge transport properties of TBI materials. However, different electroluminescence powers are observed by increasing the alkyl side, this suggesting a potential tool for the selective modulation of TBI functionalities. A deep experimental and theoretical investigation on this new family of TBI materials is provided.
机译：有机薄膜的分子结构，堆积形式，电荷迁移率和发光之间的关系是一个备受争议和争议的问题，在有机光电领域具有基础和技术意义。基于Thieno（bis）imide（TBI）的分子半导体提供了良好的可加工性，可调的自组装，双极性电荷传输和电致发光的有趣组合，因此，它是基础研究多功能分子的结构-特性相关性的理想测试基础系统。在这里，我们介绍了一种新型的噻吩（双）酰亚胺四噻吩，它们具有不同形状（直链，环状，支链）和长度（C1-C8）的烷基侧链。我们发现，与大多数分子半导体中普遍观察到的相反，烷基取代基的长度不影响TBI材料的光学，自组装和电荷传输性质。但是，通过增加烷基侧可以观察到不同的电致发光功率，这表明有可能用于选择性调节TBI功能。提供了对该新型TBI材料系列的深入实验和理论研究。

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