Low-bandgap D-A1-D-A2 type copolymers based on TPTI unit for efficient fullerene and nonfullerene polymer solar cells
作者:Long Chen、Pan Yin、Xiaoying Zeng、Chao Weng、Yueju Chen、Chaohua Cui、Ping Shen
DOI:10.1016/j.polymer.2019.121850
日期:2019.11
To obtain low-bandgap polymers paired well with fullerene and nonfullerene acceptors, here we adopted a D-A1-D-A2 motif to develop two new low-bandgap copolymers PTPTI-T-BDD and PTPTI-T-FBT, where thiophene was used as the D unit, thieno[2′,3′:5,6]pyrido[3,4-g]thieno[3,2-c]-isoquinoline-5,11(4H,10H)-dione (TPTI) was used as the A1 unit, and benzo[1,2-b:4,5-c′]dithiophene-4,8-dione (BDD) and 5,6-difluoro-2
为了获得与富勒烯和非富勒烯受体良好配对的低带隙聚合物,我们在这里采用了D-A1-D-A2基序来开发两种新的低带隙共聚物PTPTI-T-BDD和PTPTI-T-FBT,其中使用了噻吩噻吩并[2',3':5,6]吡啶并[3,4- g ]噻吩并[3,2 - c ]-异喹啉-5,11(4 H,10 H)-二酮(TPTI)作为D单元)用作A1单元,苯并[1,2-b:4,5-c']二噻吩-4,8-二酮(BDD)和5,6-二氟-2,1,3-苯并噻二唑(FBT )分别用作A2单元。A2单元的吸电子强度对PTPTI-T- BDD-和PTPTI-T-FBT的光电和光电性能的影响基于系统的富勒烯和非富勒烯聚合物太阳能电池(PSC)进行了系统研究。当与PC 71 BM和ITIC混合使用时,基于PTPTI-T-FBT的PSC的功率转换效率(PCE)分别为6.20%和6.03%,两者均高于基于PTPTI-T-BD