Regio-regular alternating diketopyrrolopyrrole-based D<sub>1</sub>–A–D<sub>2</sub>–A terpolymers for the enhanced performance of polymer solar cells
作者:Myeongjae Lee、Taehyo Kim、Hoai Van T. Nguyen、Hye Won Cho、Kyung-Koo Lee、Jong-Ho Choi、BongSoo Kim、Jin Young Kim
DOI:10.1039/c9ra08858j
日期:——
We designed and synthesized regio-regular alternating diketopyrrolopyrrole (DPP)-based D1–A–D2–A terpolymers (PDPPF2T2DPP-T2, PDPPF2T2DPP-TVT, and PDPPF2T2DPP-DTT) using a primary donor (D1) [3,3′-difluoro-2,2′-bithiophene (F2T2)] and a secondary donor (D2) [2,2′-bithiophene (T2), (E)-1,2-di(thiophen-2-yl)ethene (TVT), or dithieno[3,2-b:2′,3′-d]thiophene (DTT)]. A PDPP2DT-F2T2 D–A polymer was synthesized
我们使用主要供体( D 1 ) [ 3,3 _ _ '-difluoro-2,2'-bithiophene (F2T2)] 和第二供体 (D 2 ) [2,2'-bithiophene (T2), ( E )-1,2-di(thiophen-2-yl)ethene (TVT) 或二噻吩并[3,2- b :2',3'- d ]噻吩 (DTT)]。还合成了一种PDPP2DT-F2T2 D-A 聚合物,以比较光学、电子和光伏特性。三元共聚物的吸收峰 ( PDPPF2T2DPP-T2 ,PDPPF2T2DPP-TVT和PDPPF2T2DPP-DTT )比PDPP2DT-F2T2聚合物的峰值(λ max = 799 nm)长(λ max = 801-810 nm ),这与三元共聚物的高 HOMO 水平有关(-5.08 至 -5.13 eV)与PDPP2DT-F2T2聚合物的水平(-5.38 eV)相