论文部分内容阅读
合成了两个不同受体的共轭聚合物联噻唑-苯并噻二唑-咔唑共聚物(HSD-5);四氟苯-并二噻吩-咔唑共聚物(HSD-7),研究了其热学、光物理和光伏性质.由电化学结果显示两个聚合物的带隙分别为2.16和2.53 e V.用聚合物/[6,6]-苯基-C71-丁酸甲酯(PC71BM)作为活性层构筑了本体异质结聚合物太阳能电池的能量转换效率分别为0.36%和0.73%.同时,研究表明含氟材料由于碳-氟键高度极化改变了聚合物分子间的作用力,对活性层的形貌产生显著影响;多元受体单元间较大的扭转角会降低共轭电子离域程度,不利于分子内因电荷转移对光子的吸收,拓宽了聚合物的能带隙.最后,结合实验结果分析了两种材料制备的器件能量转换效率较低的原因.
Synthesis of two different acceptor conjugated polymers, thiazole-benzothiadiazole-carbazole copolymer (HSD-5); tetrafluorobenzene-dithiophene-carbazole copolymer Its thermal, photophysical and photovoltaic properties were determined by electrochemical measurements.The bandgaps of the two polymers were found to be 2.16 and 2.53 eV, respectively. The polymer / [6,6] -phenyl-C71-butyric acid methyl ester PC71BM) as the active layer, the energy conversion efficiencies of the bulk heterojunction polymer solar cells were 0.36% and 0.73%, respectively.At the same time, it was found that the fluorine-containing materials changed the intermolecular interactions due to the hyperpolarization of carbon-fluorine bonds Force on the morphology of the active layer has a significant impact; multiple acceptor units between the larger twist angle will reduce the extent of conjugation electron delocalization is not conducive to the transfer of intramolecular photons due to charge transfer, broaden the polymer’s band gap Finally, the reasons for the low energy conversion efficiency of the devices prepared by the two materials were analyzed based on the experimental results.