Three donor-donor type conjugated polymers (namely PTVTN1, PTVTN2 and PTVTN3) are designed and synthesized containing naphthalene unit with different sidechain substitutions. The introducing of alkoxy sidechains on the naphthalene unit could mitigate the polymer backbone twisting through S···O non-covalent interactions and therefore improve the charge carrier mobility. Besides, different sidechain positions also have a significant impact on the molecular orientation and charge carrier mobility. The best field-effect transistor (FET) mobility of 0.014 cm²/Vs is achieved based on PTVTN3 as-cast device, which is due to the favorable edge-on orientation, interdigitation and fine fiber network morphology. This work shows that how sidechains influence the polymer morphology and charge carrier mobility.

设计并合成了三种含侧链取代的萘单元的供体-供体型共轭聚合物（PTVTN1，PTVTN2和PTVTN3）。在萘单元上引入烷氧基侧链可以减轻聚合物主链因S··O非共价相互作用而发生的扭曲，从而提高了电荷载流子的迁移率。此外，不同的侧链位置也对分子取向和电荷载流子迁移率具有显着影响。基于PTVTN3，可实现0.014 cm ² / Vs的最佳场效应晶体管（FET）迁移率铸造设备，这归因于良好的边缘定位，叉指和精细的光纤网络形态。这项工作表明侧链如何影响聚合物的形态和电荷载流子迁移率。