Low band-gap D-A conjugated copolymers based on anthradithiophene and diketopyrrolopyrrole for polymer solar cells and field-effect transistors
作者:Jun Huang、Yongxiang Zhu、Lianjie Zhang、Ping Cai、Xiaofeng Xu、Junwu Chen、Yong Cao
DOI:10.1002/pola.27163
日期:2014.6.15
Two conjugatedcopolymers PADT‐DPP and PADT‐FDPP based on anthradithiophene and diketopyrrolopyrrole, with thiophene and furan as the π‐conjugated bridge, respectively, were successfully synthesized and characterized. The number‐averaged molecular weights of the two polymers are 38.7 and 30.2 kg/mol, respectively. Polymers PADT‐DPP and PADT‐FDPP exhibit broad absorption bands and their optical band
成功地合成和表征了两种基于蒽噻吩和二酮吡咯并吡咯的共轭共聚物PADT-DPP和PADT-FDPP,分别以噻吩和呋喃为π共轭桥。两种聚合物的数均分子量分别为38.7和30.2 kg / mol。聚合物PADT-DPP和PADT-FDPP表现出较宽的吸收带,其光学带隙分别为1.44和1.50 eV。PADT-DPP的最高占据分子轨道能级为-5.03 eV,而PADT-FDPP的最高分子轨道能级为-5.16 eV。在场效应晶体管中,PADT-DPP和PADT-FDPP的空穴迁移率分别为4.7×10 -3和2.7×10 -3 cm 2/(V s)分别。在聚合物太阳能电池中,PADT-DPP和PADT-FDPP的功率转换效率(PCE)分别为3.44%和0.29%。原子力显微镜显示,PADT-FDPP效率低下应与其活性层中较大的两相分离有关。如果使用1,8-二碘辛烷(DIO)作为溶剂添加剂,由于形态变