Yao Ze-Fan, Wang Zi-Yuan, Wu Hao-Tian, Lu Yang, Li Qi-Yi, Zou Lin, Wang Jie-Yu, Pei Jian
Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center of Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621999, China.
Angew Chem Int Ed Engl. 2020 Sep 28;59(40):17467-17471. doi: 10.1002/anie.202007589. Epub 2020 Aug 18.
Controlling the solution-state aggregation of conjugated polymers for producing specific microstructures remains challenging. Herein, a practical approach is developed to finely tune the solid-state microstructures through temperature-controlled solution-state aggregation and polymer crystallization. High temperature generates significant conformation fluctuation of conjugated backbones in solution, which facilitates the polymer crystallization from solvated aggregates to orderly packed structures. The polymer films deposited at high temperatures exhibit less structural disorders and higher electron mobilities (up to two orders of magnitude) in field-effect transistors, compared to those deposited at low temperatures. This work provides an effective strategy to tune the solution-state aggregation to reveal the relationship between solution-state aggregation and solid-state microstructures of conjugated polymers.
控制共轭聚合物的溶液态聚集以产生特定微观结构仍然具有挑战性。在此，开发了一种实用方法，通过温度控制的溶液态聚集和聚合物结晶来精细调节固态微观结构。高温会使溶液中共轭主链产生显著的构象波动，这有助于聚合物从溶剂化聚集体结晶为有序堆积结构。与低温沉积的聚合物薄膜相比，高温沉积的聚合物薄膜在场效应晶体管中表现出更少的结构无序和更高的电子迁移率（高达两个数量级）。这项工作提供了一种有效的策略来调节溶液态聚集，以揭示共轭聚合物溶液态聚集与固态微观结构之间的关系。
