Narrow band gap benzodithiophene and quinoxaline bearing conjugated polymers for organic photovoltaic applications
作者:Meric Caliskan、Mert Can Erer、Sultan Taskaya Aslan、Yasemin Arslan Udum、Levent Toppare、Ali Cirpan
DOI:10.1016/j.dyepig.2020.108479
日期:2020.9
backbone. After completion of synthesis of desired polymers, their structures were identified with 1H NMR spectroscopy and their number and weight average molecular weights were examined with gel permeation chromatography (GPC). The effects of introducing fused structure and incorporation of an electron withdrawing F atom to the quinoxaline part on the electrochemical, spectroelectrochemical, optical and
供体-受体单元的合理选择和优化允许带隙调谐以及块体异质结(BHJ)太阳能电池的光敏层的光吸收能力和能级。在这项工作中,通过Pd(0)催化的Stille缩聚反应合成了一系列新的喹喔啉和硒基苯并[1,2-b:4,5-b']二噻吩(BDT)共轭聚合物。将2-(2-辛基十二烷基)硒烯环连接到BDT中苯环的第4和8位以获得施主部分,并将三个不同的喹喔啉部分作为受体引入到BDT主链中。完成所需聚合物的合成后,它们的结构用1标识。用凝胶渗透色谱法(GPC)检查1 H NMR光谱及其数均和重均分子量。研究了引入熔融结构和将吸电子的F原子引入喹喔啉部分对合成聚合物的电化学,光谱电化学,光学和形态学性质的影响,并将其与光伏性能相关。P1,P2和P3这两种聚合物均用作活性层中的供体链段。将它们与PC 71 BM([6,6]-苯基C 71-丁酸甲酯)作为受体结合,以制造体异质结太阳能电池。发现最高的电源转换效率为2