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Effective regulation of the micro-structure of thick P3HT:PC71BM film by the incorporation of ethyl benzenecarboxylate in toluene solution

机译:通过在甲苯溶液中引入苯甲酸乙酯来有效调节厚的P3HT:PC71BM膜的微观结构

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In this work, ethyl benzenecarboxylate (EB) was creatively selected as the additive in a blend of poly(3-hexylthiophene)/phenyl-C71-butyric acid methyl ester (P3HT/PC71BM) in non-halogenated solvent toluene (TL). With the optimized incorporating concentration of EB (i.e. 2 vol%) in toluene, a great power conversion efficiency (PCE) enhancement of 4.11% was achieved without thermal annealing, whereas a maximum PCE of 4.82% with thermal annealing was achieved under the same conditions. According to our systematic characterization results, we could conclude that we successfully regulated the microstructures, including phase separation, the domain sizes of P3HT or PC71BM and the crystallinity of P3HT by incorporating 2 vol% EB in TL solution. The effectiveness of EB as a TL additive in P3HT/PC71BM can be interpreted based on its Hansen solubility parameters (HSPs) and its high boiling point.
机译:在这项工作中,创造性地选择了苯甲酸乙酯(EB)作为非卤代溶剂甲苯(TL)中聚(3-己基噻吩)/苯基-C71-丁酸甲酯(P3HT / PC71BM)的混合物的添加剂。通过优化的EB在甲苯中的掺入浓度(即2 vol%),在不进行热退火的情况下,功率转换效率(PCE)增强了4.11%,而在相同条件下进行热退火的情况下,PCE的最大值达到了4.82% 。根据我们的系统表征结果,我们可以得出结论,通过在TL溶液中掺入2%的EB,我们成功地调节了微观结构,包括相分离,P3HT或PC71BM的畴尺寸以及P3HT的结晶度。 EB作为P3HT / PC71BM中的TL添加剂的有效性可以基于其Hansen溶解度参数(HSP)和高沸点来解释。

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