National Engineering Lab of Special Display Technology, State Key Lab of Advanced Display Technology, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei, 230009, China.
Anhui Province Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, 230009, China.
Macromol Rapid Commun. 2022 Feb;43(3):e2100636. doi: 10.1002/marc.202100636. Epub 2021 Dec 8.
High performance organic field effect transistor devices based on intrinsically scalable materials are of great significance in wearable electronics. In this work, an exclusive approach is reported to rationale the carrier mobility and stretchability of the conjugate polymers (CPs) by modifying the symmetry of the side chains species. Semiconductor CPs with symmetrical alkyl side chains (P(C-C)), symmetrical siloxane side chains (P(Si-Si)), and asymmetrical silicon-carbon side chains (P(C-Si)) are synthesized to investigate the influence of these side chains on the carrier mobility and mechanical behavior. The result shows that silicon-carbon asymmetric side chains can modulate the aggregation degree of polymer chains with a coherence length of 134 Å and maintain the mobility at 0.90 cm V s . P(C-Si) exhibits superior tensile properties that even elongation up to 100% the value of mobility retains a majority properties. The main reason is that the lowest coherence length of P(C-Si) polymer leads to an increased proportion of amorphous zones in its polymer film, which efficiently dissipates mechanical stresses. This study provides an efficient strategy for the design and synthesis of the CPs with high carrier transport properties-mechanical stability.
基于本征可扩展材料的高性能有机场效应晶体管器件在可穿戴电子产品中具有重要意义。在这项工作中，通过修饰侧链种类的对称性，报道了一种独特的方法来合理化共聚物 (CP) 的载流子迁移率和拉伸性。合成了具有对称烷基侧链的半导体 CP（P(C-C)）、对称硅氧烷侧链的 CP（P(Si-Si)）和不对称硅-碳侧链的 CP（P(C-Si)），以研究这些侧链对载流子迁移率和机械性能的影响。结果表明，硅-碳不对称侧链可以调节聚合物链的聚集程度，具有 134 Å 的相干长度，并保持 0.90 cm V s 的迁移率。P(C-Si) 表现出优异的拉伸性能，即使伸长率高达 100%，迁移率仍保留大部分特性。主要原因是 P(C-Si) 聚合物的最低相干长度导致其聚合物薄膜中无定形区的比例增加，从而有效地耗散机械应力。这项研究为设计和合成具有高载流子输运性能-机械稳定性的 CP 提供了一种有效的策略。
