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Synthesis of di(ethylene glycol)-functionalized diketopyrrolopyrrole derivative-based side chain-conjugated polymers for bulk heterojunction solar cells

机译:本体异质结太阳能电池用二(乙二醇)官能化的二酮吡咯并吡咯衍生物侧链共轭聚合物的合成

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Polythiophenes (PTs) featuring di(ethylene glycol)-substituted 2,5-thienyl diketopyrrolopyrrole (DG-TDPP) moieties as conjugated units in the polymer backbone and tert-butyl-substituted triphenylamine (tTPA)-containing moieties as pendant units have been synthesized through Stille coupling. Incorporating the electron-deficient DG-TDPP moieties within the polymer backbone and appending the tTPA units promoted charge balance and efficient conjugation within the extended conjugated frameworks of the polymers, resulting in lower band gap energies and red-shifting the maximum UV-Vis absorption wavelength. The influence of the DG-TDPP content on the optical, electrochemical, and photovoltaic (PV) properties of the polymers has been studied. Incorporating a suitable content of DG-TDPP moieties in the polymer backbone enhanced the solar absorption ability and conjugation length of the PTs. The PV properties of bulk-heterojunction solar cells based on PT/fullerene derivatives improved after incorporating DG-TDPP units in the backbones of the side chain-conjugated PTs.
机译:聚噻吩(PTs),其特征是在聚合物主链中具有二(乙二醇)取代的2,5-噻吩基二酮吡咯并吡咯(DG-TDPP)部分作为共轭单元,并且由-丁基取代的三苯胺( t通过Stille偶联合成了含有 TPA)的侧基单元。在聚合物主链中引入缺电子的DG-TDPP部分,并添加 t TPA单元,可在聚合物的扩展共轭骨架内促进电荷平衡和有效共轭,从而导致较低的带隙能和红色改变最大UV-Vis吸收波长。 DG-TDPP含量对聚合物的光学,电化学和光伏(PV)性能的影响已得到研究。在聚合物主链中掺入适当含量的DG-TDPP部分,增强了PT的太阳吸收能力和共轭长度。在侧链共轭PT的骨架中掺入DG-TDPP单元后,基于PT /富勒烯衍生物的体-异质结太阳能电池的PV性能得到改善。

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