Two conjugated polymers based on benzo[1,2-b:4,5-b′]dithiophene (BDT) with triethylene glycol (TEG) and ethylhexyl side chains (abbreviated as PBDTT-TEG and PBDTT-EH, respectively) were designed and synthesized. A polymer field-effect transistor of PBDTT-TEG exhibited a charge carrier mobility nearly one order of magnitude higher than that of PBDTT-EH. Measurements on polymer solar cells (PSCs) based on polymer:[6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) binary blends showed the PBDTT-TEG-based devices had higher short-circuit current density (Jsc) than PBDTT-EH. The effect of the incorporation of PBDTT-TEG into PBDTT-EH on the photovoltaic properties has been investigated by blending them together with different ratios. The optimization of the devices showed an obvious increase in fill factor (FF) values and an improvement in efficiency compared with their binary ones, which is ascribed to a higher charge mobility and higher crystallinity of PBDTT-TEG.
                                    设计了两种基于
苯并[1,2-b:4,5-b']二噻吩(BDT)与
三甘醇(T
EG)和乙基己基侧链的共轭聚合物(分别缩写为
PBDTT-T
EG和
PBDTT-EH)并合成的。 
PBDTT-T
EG 聚合物场效应晶体管的载流子迁移率比 
PBDTT-EH 高出近一个数量级。对基于聚合物:[6,6]-苯基-C71-
丁酸甲酯 (PC71BM) 二元混合物的聚合物太阳能电池 (PSC) 的测量表明,基于 
PBDTT-T
EG 的器件具有比基于 
PBDTT-T
EG 的器件更高的短路电流密度 (Jsc)。 
PBDTT-EH。通过将
PBDTT-T
EG以不同比例混合在一起,研究了将
PBDTT-T
EG掺入
PBDTT-EH对光伏性能的影响。与二元器件相比,器件的优化显示出填充因子(FF)值的明显增加和效率的提高,这归因于
PBDTT-T
EG具有更高的电荷迁移率和更高的结晶度。