Abstract In this work, thieno[3,2-b]thiophene based homopolymers, namely poly(5,6-bis(octyloxy)-4,7-bis(thieno[3,2-b]thiophen-2-yl)benzo[c][1,2,5]selenadiazole; PBSeThTh), poly(5-(2-ethylhexyl)-1,3-bis(thieno[3,2-b]thiophen-2-yl)-4H-thieno[3,4-c]pyrrole-4,6(5H)-dione; PTPDThTh) and poly((E)-6,6′-bis(thieno[3,2-b]thiophen-2-yl)-1,1′-diundecyl-[3,3′-biindolinylidene]-2,2′-dione; PIIDThTh), were obtained potentiodynamically to tailor optoelectronic properties via altering electron acceptor moieties which were 5,6-bis(octyloxy)benzo[c][1,2,5]selenadiazole 5-(2-ethylhexyl)-4H-thieno[3,4-c]pyrrole-4,6(5H)-dione (TPD) and (E)-1,1′-diundecyl-[3,3′-biindolinylidene]-2,2′-dione (IID). The polymers were characterized cyclic voltammetry and spectroelectrochemistry studies. All polymers reveal ambipolar and multichromic characteristics with broad spectral absorptions, low-lying highest occupied molecular orbital (−5.69 eV, −5.59 eV, −5.60 eV), and as well as low band gap ranging from 1.58 eV to 1.86 eV. Isoindigo comprising polymer resulted in the lowest optical band gap which was 1.16 eV due to a red shift in the absorption most probably due to richer electron density and strong inter-chain interactions, structural planarity.

中文翻译：

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通过电子受体部分定制包含均聚物的噻吩并 [3,2-b] 噻吩的光电特性：噻吩并吡咯二酮、2,1,3-苯并硒二唑、异靛蓝

摘要 在这项工作中，噻吩并[3,2-b]噻吩基均聚物，即聚（5,6-双（辛氧基）-4,7-双（噻吩并[3,2-b]噻吩-2-基）苯并[c][1,2,5]硒二唑；PBSSeThTh)，聚(5-(2-乙基己基)-1,3-双(噻吩并[3,2-b]噻吩-2-基)-4H-噻吩并[ 3,4-c]吡咯-4,6(5H)-二酮；PTPDThTh)和聚((E)-6,6'-双(噻吩并[3,2-b]噻吩-2-基)-1， 1'-二十一烷基-[3,3'-二二吲哚亚基]-2,2'-二酮；PIIDThTh)，通过改变电子受体部分（5,6-双（辛氧基）苯并[c]）以电位动力学方式获得以定制光电特性[1,2,5]硒二唑 5-(2-ethylhexyl)-4H-thieno[3,4-c]pyrrole-4,6(5H)-dione (TPD) 和 (E)-1,1'-diundecyl -[3,3'-二二吲哚亚基]-2,2'-二酮 (IID)。聚合物的特点是循环伏安法和光谱电化学研究。所有聚合物都显示出双极性和多色特性，具有广泛的光谱吸收、低位的最高占据分子轨道（-5.69 eV、-5.59 eV、-5.60 eV），以及从 1.58 eV 到 1.86 eV 的低带隙。包含异靛蓝的聚合物导致最低的光学带隙为 1.16 eV，这是由于吸收的红移最可能是由于更丰富的电子密度和强链间相互作用、结构平面性。