Ren Shiwei, Ding Yubing, Zhang Wenqing, Wang Zhuoer, Wang Sichun, Yi Zhengran
Zhuhai-Fudan Innovation Research Institute, Hengqin 519000, China.
Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Polymers (Basel). 2023 Sep 18;15(18):3803. doi: 10.3390/polym15183803.
Organic polymer semiconductor materials, due to their good chemical modifiability, can be easily tuned by rational molecular structure design to modulate their material properties, which, in turn, affects the device performance. Here, we designed and synthesized a series of materials based on terpolymer structures and applied them to organic thin-film transistor (OTFT) device applications. The four polymers, obtained by polymerization of three monomers relying on the Stille coupling reaction, shared comparable molecular weights, with the main structural difference being the ratio of the thiazole component to the fluorinated thiophene (Tz/FS). The conjugated polymers exhibited similar energy levels and thermal stability; however, their photochemical and crystalline properties were distinctly different, leading to significantly varied mobility behavior. Materials with a Tz/FS ratio of 50:50 showed the highest electron mobility, up to 0.69 cm V s. Our investigation reveals the fundamental relationship between the structure and properties of materials and provides a basis for the design of semiconductor materials with higher carrier mobility.
有机聚合物半导体材料因其良好的化学可修饰性，可通过合理的分子结构设计轻松调节，以调控其材料性能，进而影响器件性能。在此，我们基于三元共聚物结构设计并合成了一系列材料，并将其应用于有机薄膜晶体管（OTFT）器件。这四种聚合物通过三种单体依靠Stille偶联反应聚合得到，分子量相近，主要结构差异在于噻唑组分与氟化噻吩的比例（Tz/FS）。这些共轭聚合物表现出相似的能级和热稳定性；然而，它们的光化学和结晶性能明显不同，导致迁移率行为显著变化。Tz/FS比例为50:50的材料显示出最高的电子迁移率，高达0.69 cm² V⁻¹ s⁻¹。我们的研究揭示了材料结构与性能之间的基本关系，并为设计具有更高载流子迁移率的半导体材料提供了依据。
