Huo Lijun, Zhou Yi, Li Yongfang
Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
Macromol Rapid Commun. 2009 Jun 2;30(11):925-31. doi: 10.1002/marc.200800785. Epub 2009 Apr 15.
Two polythiophene derivatives with electron-donating alkylthio side chains, poly[(3-hexylthio)thiophene] (P3HST) and poly[(3-hexylthio)thiophene-alt-thiophene] (P3HST-co-Th) have been synthesized and characterized. Both P3HST and P3HST-co-Th show broader absorption peaks than poly(3-hexylthiophene). Meanwhile, the alkylthio side chains decrease the HOMO energy level of the polymers, which benefits the higher open circuit voltage of the polymer solar cells (PSCs) based on the polymer as donor. PSCs have been fabricated with the polymers as donor and [6,6]-phenyl C61 butyric acid methyl ester as acceptor (1: 1, w/w). The devices based on P3HST and P3HST-co-Th show an open circuit voltage of 0.63 V, and a power conversion efficiency of 0.34% and 0.5%, respectively, under the illumination of AM1.5, 80 mW · cm(-2) .
两种带有供电子烷基硫侧链的聚噻吩衍生物，聚(3-己基硫基)噻吩和聚(3-己基硫基)噻吩-alt-噻吩已被合成并表征。P3HST和P3HST-co-Th都显示出比聚(3-己基噻吩)更宽的吸收峰。同时，烷基硫侧链降低了聚合物的最高占据分子轨道(HOMO)能级，这有利于基于该聚合物作为给体的聚合物太阳能电池(PSC)具有更高的开路电压。已制备出以这些聚合物作为给体和[6,6]-苯基-C61丁酸甲酯作为受体(1:1，w/w)的PSC。基于P3HST和P3HST-co-Th的器件在AM1.5、80 mW·cm(-2)光照下分别显示出0.63 V的开路电压和0.34%和0.5%的功率转换效率。
