Organic thin-film transistors (OTFTs) are expected to play a key role in future printed electronics. As a promising candidate for numerous commercial applications and next-generation electronics, organic small molecule/polymer blend systems have attracted significant interest. Herein, recent developments and progress in polymer blends based on small molecule semiconductors and polymers for OTFTs are discussed with a focus on device operation, solution processing, phase separation, and semiconductor blend system morphologies. The blends exhibit promising characteristics, combining the high charge-carrier mobility of small molecules, solution-based processability of polymers, and unique morphological features of their blends. Both insulating and conjugated polymers are separately reviewed to discuss the effects of polymeric components on the charge transport properties, film quality, and morphology. The outlook for this field along with future opportunities and challenges are also discussed.

预计有机薄膜晶体管（OTFT）在未来的印刷电子产品中将发挥关键作用。作为众多商业应用和下一代电子产品的有希望的候选者，有机小分子/聚合物共混体系引起了极大的兴趣。本文中，讨论了基于小分子半导体的聚合物共混物和用于OTFT的聚合物的最新发展和进展，重点是器件操作，溶液处理，相分离和半导体共混物系统形态。这些共混物展现出令人鼓舞的特性，结合了小分子的高电荷载流子迁移率，聚合物的基于溶液的可加工性以及其共混物的独特形态特征。绝缘聚合物和共轭聚合物分别进行了综述，以讨论聚合物组分对电荷传输性能，薄膜质量和形态的影响。还讨论了该领域的前景以及未来的机遇和挑战。