共轭聚合物中电荷输运的多层次研究,Accounts of Chemical Research

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共轭聚合物中电荷输运的多层次研究
Accounts of Chemical Research ( IF 16.4 ) Pub Date : 2016-10-25 00:00:00 , DOI: 10.1021/acs.accounts.6b00368
Huanli Dong ₁ , Wenping Hu _{1,

2}

Affiliation

自发现共轭聚合物以来，共轭聚合物由于其对光电子器件的巨大希望而引起了全世界的关注。然而，对共轭聚合物中电荷传输的基本理解尚不清楚。挑战的根源是固态具有复杂分子结构的聚合物的自然紊乱。而且，缺少检查共轭聚合物的固有性质的有效方法。光电器件始终基于旋涂膜。在膜中，由于大分子链的高度构象自由度和不规则的链间缠结，聚合物倾向于在纳米到微米的长度尺度上形成高度无序的结构，因此通常导致比其固有性能低得多的电荷传输性能。此外，加工条件的细微变化可能会极大地影响膜的形成-导致形貌，结晶度，微观结构，分子堆积和排列的巨大变化，最终显着改变有效电荷的传输，甚至在一个数量级上也导致很大的不一致。基于相同聚合物半导体的器件。同时，基于膜中聚合物的这种复杂的微结构，共轭聚合物中的电荷传输机理仍不清楚，并且其研究具有挑战性。因此，数十年来，如何客观地评价共轭聚合物的电荷传输并探讨其电荷传输机理。微观结构，分子堆积和排列，最终显着改变有效电荷传输，即使对于基于同一聚合物半导体的器件，也要在一个数量级上产生极大的不一致。同时，基于膜中聚合物的这种复杂的微结构，共轭聚合物中的电荷传输机理仍不清楚，并且其研究具有挑战性。因此，数十年来，如何客观地评价共轭聚合物的电荷传输并探讨其电荷传输机理。微观结构，分子堆积和排列，最终显着改变有效电荷传输，即使对于基于同一聚合物半导体的器件，也要在一个数量级上产生极大的不一致。同时，基于膜中聚合物的这种复杂的微结构，共轭聚合物中的电荷传输机理仍不清楚，并且其研究具有挑战性。因此，数十年来，如何客观地评价共轭聚合物的电荷传输并探讨其电荷传输机理。共轭聚合物中的电荷传输机理仍不清楚，基于薄膜中聚合物的这种复杂的微观结构，其研究仍具有挑战性。因此，数十年来，如何客观地评价共轭聚合物的电荷传输并探讨其电荷传输机理。共轭聚合物中的电荷传输机理仍不清楚，基于薄膜中聚合物的这种复杂的微观结构，其研究仍具有挑战性。因此，数十年来，如何客观地评价共轭聚合物的电荷传输并探讨其电荷传输机理。

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Multilevel Investigation of Charge Transport in Conjugated Polymers

Conjugated polymers have attracted the world’s attentions since their discovery due to their great promise for optoelectronic devices. However, the fundamental understanding of charge transport in conjugated polymers remains far from clear. The origin of this challenge is the natural disorder of polymers with complex molecular structures in the solid state. Moreover, an effective way to examine the intrinsic properties of conjugated polymers is absent. Optoelectronic devices are always based on spin-coated films. In films, polymers tend to form highly disordered structures at nanometer to micrometer length scales due to the high degree of conformational freedom of macromolecular chains and the irregular interchain entanglement, thus typically resulting in much lower charge transport properties than their intrinsic performance. Furthermore, a subtle change of processing conditions may dramatically affect the film formation—inducing large variations in the morphology, crystallinity, microstructure, molecular packing, and alignment, and finally varying the effective charge transport significantly and leading to great inconsistency over an order of magnitude even for devices based on the same polymer semiconductor. Meanwhile, the charge transport mechanism in conjugated polymers is still unclear and its investigation is challenging based on such complex microstructures of polymers in films. Therefore, how to objectively evaluate the charge transport and probe the charge transport mechanism of conjugated polymers has confronted the world for decades.

更新日期：2016-10-25

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