Steady Enhancement in Photovoltaic Properties of Fluorine Functionalized Quinoxaline-Based Narrow Bandgap Polymer
作者:Zhonglian Wu、Huanxiang Jiang、Xingzhu Wang、Lei Yan、Wei Zeng、Xiu-Gang Wu、Haiyu Zhuang、Wen Zhu、Renqiang Yang
DOI:10.3390/molecules24010054
日期:——
influence of fluoride phenyl side-chains onto a quinoxaline (Qx) unit on the photovoltaic performance of the narrow bandgap (NBG) photovoltaic polymers, herein, two novel NBG copolymers, PBDTT-DTQx and PBDTT-DTmFQx, were synthesized and characterized. 2-ethylhexylthiothiophene-substituted benzodithiophene (BDTT), 2,3-diphenylquinoxaline (DQx) [or 2,3-bis(3-fluorophenyl)quinoxaline (DmFQx)] and 2-ethylhexylthiophene
为了研究氟苯基侧链在喹喔啉(Qx)单元上对窄带隙(NBG)光伏聚合物的光伏性能的影响,本文合成并表征了两种新型NBG共聚物PBDTT-DTQx和PBDTT-DTmFQx 。使用2-乙基己基噻吩基取代的苯并二噻吩(BDTT),2,3-二苯基喹喔啉(DQx)[或2,3-双(3-氟苯基)喹喔啉(DmFQx)]和2-乙基己基噻吩(T)作为电子给体(D )单元,吸电子受体(A)单元和π桥。与非氟取代的PBDTT-DTQx相比,氟化物PBDTT-DTmFQx表现出较宽的UV-Vis吸收光谱和高空穴迁移率。短路电流(Jsc)和填充因子(FF)的提高同时提高了基于聚合物/ PC71BM的聚合物太阳能电池(PSC)的效率。在AM 1.5G(100 mW cm-2)的照明下,开路电压(Voc)为0.87 V,Jsc为12.0 mA cm-2时,最大功率转换效率(PCE)为6.40%。基于PBDTT-DTmFQx