For totally disordered organic polymer films, charge mobility is low, while the mobility significantly increases if the polymer exhibits self-assembling properties that can be exploited to generate ordered structures. Introducing a hydrogen-bonding functionality in the materials, resulting in hydrogen-bonded material superstructures, can be a suitable method to fulfil those critical requirements. To the best of our knowledge, the chromophores with hydrogen bonding ability are rarely investigated. Quinacridone () with large π-conjugation system, planar structure as well as the amide and carbonyl groups, is attracted our attention. The hydrogen bonding association (NH…OC) can be formed between the amide groups and the carbonyl units from the core. In this work, the chromophore is, for the first time, introduced as the electron withdrawing unit in donor-acceptor type polymers for semiconductors. The hydrogen bonded polymers exhibit significantly large red shifted up to 192 nm, which indicates that the hydrogen bonding association in the system is powerful. In addition, the hydrogen bonding association led to the polymers not only from a disorder state and inferior crystallinity transferring into a more ordered structures with a block- or fiber-liked-shaped crystalline, but also a strong aggregation. This observation is beneficial for the hole transporting between the neighboring molecules. In addition, the HOMO energy levels have been improved after the hydrogen bonding association formation, which is advantage for the Ohmic contact formation. As a consequent, the hole transport mobility is significantly improved from 0.13 cm V s–1.02 cm V s. This work demonstrate that is a novel and promising electron-deficient building block with potential strong hydrogen bonding association for the high-performance semiconductor.

中文翻译：

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用于 OFET 的具有强氢键的自组装喹吖啶酮 (QA) 聚合物


对于完全无序的有机聚合物薄膜，电荷迁移率较低，而如果聚合物表现出可用于生成有序结构的自组装特性，则迁移率会显着增加。在材料中引入氢键功能，产生氢键材料超结构，可能是满足这些关键要求的合适方法。据我们所知，具有氢键能力的发色团很少被研究。喹吖啶酮()具有大的π-共轭体系、平面结构以及酰胺基和羰基，引起了人们的关注。氢键缔合（NH…OC）可以在酰胺基团和核心的羰基单元之间形成。在这项工作中，首次将发色团作为吸电子单元引入半导体的供体-受体型聚合物中。氢键聚合物表现出显着大的红移，高达 192 nm，这表明系统中的氢键缔合是强大的。此外，氢键缔合不仅导致聚合物从无序状态和较差的结晶度转变为具有块状或纤维状晶体的更有序的结构，而且导致强烈的聚集。这一观察结果有利于相邻分子之间的空穴传输。此外，氢键缔合形成后HOMO能级得到了提高，这有利于欧姆接触的形成。因此，空穴传输迁移率从 0.13 cm V s 显着提高至 1.02 cm V s。 这项工作表明，这是一种新颖且有前途的缺电子结构单元，具有潜在的强氢键缔合，可用于高性能半导体。