The development of n-type conjugated polymers (CPs) forming an acceptor–acceptor (A–A)-type structure are quite challenging due to the synthetic limitation of imposing a functional group on the electron deficient aromatic structure. The diketopyrrolopyrroles (DPP) structure exhibits n-type characteristics; however, the extended π-structure enables stannylation at the terminal position. The stannylated DPP is beneficial for making n-type CPs, but its use in the development of n-type CPs and their application in n-type organic thin-film transistors and organic thermoelectric devices have been not extensively studied. In the present study, we synthesized the A–A-type conjugated polymer, poly [((2,5-bis(2-ethylhexyl)-3,6-di(thiophen-2-yl)-2,5-dihydropyrrolo [3,4-c]pyrrole-1,4-dione)-5,5′-diyl)-alt-((2,7-bis(2-ethylhexyl)benzo [lmn] [3,8]phenanthroline-1,3,6,8(2H,7H)-tetraone)-4,9-diyl))] (PDPP-NDI), by Stille coupling of distannylated DPP and dibrominated naphthalene diimide (NDI). The alternating copolymerization of DPP and NDI moieties led to a low-lying LUMO energy level of −4.4 eV, suitable for electron transport. The n-type organic thin-film transistors were fabricated with PDPP–NDI, and a substantial average electron mobility of 3.78 × 10⁻² cm² V⁻¹ s⁻¹ was obtained after thermal annealing. The n-type organic thermoelectric devices were developed via n-doping, and PDPP–NDI exhibited n-type thermoelectric properties, with an average power factor of 1.82 × 10⁻³ μW m⁻¹ K⁻².

由于在电子缺陷型芳香族结构上加成官能团的合成限制，形成受主-受主（AA）型结构的n型共轭聚合物（CP）的开发非常具有挑战性。二酮吡咯并吡咯（DPP）结构表现出n型特征。但是，扩展的π结构可以在末端位置进行甲锡烷基化。锡烷基化的DPP有利于制造n型CP，但是它在n型CP的开发中的应用及其在n型CP中的应用尚未广泛研究类型的有机薄膜晶体管和有机热电器件。在本研究中，我们合成了A–A型共轭聚合物，聚[（（（2,5-双（2-乙基己基）-3,6-二（噻吩-2-基）-2,5-二氢吡咯[ 3,4- ç ]吡咯-1,4-二酮）-5,5'-二基） - ALT - （（2,7-双（2-乙基己基）苯并[LMN] [3,8]菲咯啉-1， 3,6,8（2 H，7 H）-tetraone）-4,9-diyl））]（PDPP-NDI），通过二苯甲酰化DPP和二溴化萘二酰亚胺（NDI）的Stille偶联。DPP和NDI部分的交替共聚导致−4.4 eV的低态LUMO能级，适合电子传输。该ñ用PDPP-NDI制造了有机型有机薄膜晶体管，并且在热退火之后获得了实质上的平均电子迁移率，为3.78×10 ^-2  cm ²  V ^-1  s ^-1。的Ñ型有机热电装置被开发经由Ñ掺杂，和PDPP-NDI表现出Ñ型热电性能，具有1.82×10的平均功率因子^-3  μW米^-1  ķ ^-2。