Thieno[3,4-b]thiophene–benzo[1,2-b:4,5-b′]dithiophene-based polymers bearing optically pure 2-ethylhexyl pendants: Synthesis and application in polymer solar cells
作者:Tomoyuki Ikai、Ryotaro Kojima、Sinji Katori、Tomoyuki Yamamoto、Takayuki Kuwabara、Katsuhiro Maeda、Kohshin Takahashi、Shigeyoshi Kanoh
DOI:10.1016/j.polymer.2014.11.033
日期:2015.1
active narrow-bandgap polymers ((R,R)- and (S,S)-PTB5) consisting of alternating n-octyl thieno[3,4-b]thiophene-2-carboxylate and benzo[1,2-b:4,5-b′]dithiophene units bearing optically pure (R)- and (S)-2-ethylhexyl pendants, respectively, were synthesized for the first time. (R,R)- and (S,S)-PTB5 films showed apparent circular dichroism in their absorption regions of the polymer backbone due to the
光学活性的窄带隙聚合物(([R ,- [R )-和(小号,小号)-PTB5)由交替的Ñ辛基噻吩并[3,4- b ]噻吩-2-羧酸甲酯和苯并[1,2- b:首次合成分别带有光学纯的(R)-和(S)-2-乙基己基侧基的4,5- b ']二噻吩单元。(R,R)-和(S,S)-PTB5膜在聚合物主链的吸收区域中表现出明显的圆二色性,这是由于支链烷基侧基的手性引起的手性有序超结构的形成。使用(R,R)-或(S,S)-PTB5作为电子供体,并用[6,6]-苯基-C 61-丁酸甲酯作为电子,制备了倒置型大容量异质结聚合物太阳能电池(PSC)。受体。将PSC的光伏性能与相应的PSC的光伏性能进行了比较,其中相应的PSC包含带有消旋的2-乙基己基侧基的光学惰性PTB5。