Synthesis and photovoltaic properties from inverted geometry cells and roll-to-roll coated large area cells from dithienopyrrole-based donor–acceptor polymers
作者:Wei Yue、Thue T. Larsen-Olsen、Xiaolian Hu、Minmin Shi、Hongzheng Chen、Mogens Hinge、Peter Fojan、Frederik C. Krebs、Donghong Yu
DOI:10.1039/c2ta00695b
日期:——
donor–acceptor low band gap polymers composed of alternating dithienopyrrole or its derivative as donors and phthalimide or thieno[3,4-c]pyrrole-4,6-dione as acceptors (P1–P4) are synthesized by Stille coupling polymerization. All polymers show strong absorption in the visible region, for P2 and P4 possessing thieno[3,4-c]pyrrole-4,6-dione as an acceptor, their film absorption covers the region of 500–800
一系列供体-受体低带隙聚合物,由交替组成 二硫代吡咯 或其作为捐助者的衍生物,以及 邻苯二甲酰亚胺 或者 噻诺[3,4- c ]吡咯-4,6-二酮由于受体(P1-P4)是通过Stille偶联聚合合成的。所有聚合物表现出很强的吸收在可见光区,为P2和P4拥有噻诺[3,4- c ]吡咯-4,6-二酮作为受体,它们的薄膜吸收分别覆盖500-800 nm和500-750 nm的区域,这使其成为低带隙聚合物太阳能电池(PSC)材料的吸引力。通过并入噻吩桥,P3和P4的HOMO能级分别比P1和P2高0.24和0.21 eV 。对于P2,获得的带隙低至1.66 eV 。在具有倒装器件几何形状的体异质结PSC上进行了放大实验,该结构通过旋涂和小尺寸辊对辊(R2R)狭缝模头涂布和丝网印刷进行了小规模制造。在这两种情况下,性能最好的聚合物都是V oc的P2。0.56的V,一个Ĵ SC毫安-12.6厘米-2,40