共轭分子自身结构转变对结晶形貌及电学性能的影响

发布时间：2018-01-06 18:11

本文关键词：共轭分子自身结构转变对结晶形貌及电学性能的影响　出处：《液晶与显示》2017年06期 　论文类型：期刊论文

【摘要】：在共轭光电材料的应用中,材料的溶解度决定着其加工性能,而分子规则的自组装排列对于其在固态中的结晶性起着重要作用。然而如何保证材料同时具有高的溶解度和结晶性是目前共轭有机半导体研究的一个难点。本工作选择两个相似共轭分子进行研究,其中:一个是平面结构,另一个是扭曲结构。结果发现扭曲结构分子不仅溶解度比平面结构分子大,而且在固态状态下,会自发转变成平面结构获得更好的结晶性。进一步研究分子薄膜器件的微纳结构对电学性能的影响。结果表明扭曲分子的场效应晶体管性能优于平面分子,迁移率达到6.73×10~(-3)cm~2/V·s,比平面分子薄膜的迁移率高出一个数量级。本文揭示分子结构、聚集态结构与电学性能之间的关系,为未来设计合成高效共轭分子提供了新思路。
[Abstract]:In the application of conjugate optoelectronic materials, the solubility of the materials determines their processing performance. The regular self-assembly of molecules plays an important role in the crystallization of solid materials. However, how to ensure the high solubility and crystallinity of the materials is a difficult point in the study of conjugated organic semiconductors. Two similar conjugate molecules were selected for study. One of them is planar structure and the other is twisted structure. It is found that twisted structure molecule is not only more soluble than planar structure molecule, but also in solid state. The effect of microstructures on electrical properties of molecular thin film devices is further studied. The results show that the field effect transistors of twisted molecules are superior to those of planar molecules. The mobility is 6.73 脳 10 ~ (-3) C ~ (-1) V 路s, which is an order of magnitude higher than that of planar molecular thin films. The relationship between molecular structure, aggregation structure and electrical properties is revealed in this paper. It provides a new idea for the design and synthesis of highly efficient conjugated molecules in the future.
【作者单位】：北京交通大学理学院光电子技术研究所;
【基金】：博士后面上基金(No.2015M570923) 博士后特别资助(No.2016T90030)~~
【分类号】：TN304.5
【正文快照】： 在最近的十多年中,基于共轭聚合物和小分子的有机光电器件取得了长足的发展[1-6],例如有机太阳能电池[7-9],场效应晶体管[10-11],探测器[12-13]等。大量的有机半导体材料被合成和研究,然而为了进一步提高有机光电器件的效果和性能并最终实现商业化应用,还需要能够对材料结构与

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