Complementary Hydrogen Bonding and Block Copolymer Self-Assembly in Cooperation toward Stable Solar Cells with Tunable Morphologies
作者:Fei Li、Kevin G. Yager、Noel M. Dawson、Jianzhong Yang、Kevin J. Malloy、Yang Qin
DOI:10.1021/ma4016399
日期:2013.11.26
report the synthesis and characterization of a polythiophene diblock copolymer selectively functionalized with 1-n-hexylisoorotic acid moieties (P4) and a 2,6-diaminopyridine tethered fullerene derivative (PCBP). Self-assembly between P4 and PCBP through “three-point” complementary hydrogen bonding interactions is utilized to control and stabilize blend morphologies. These interactions have been studied
我们报告的合成和表征的聚噻吩二嵌段共聚物选择性地功能化的1- n-己基异山梨酸部分(P4)和2,6-二氨基吡啶系留的富勒烯衍生物(PCBP)。通过“三点”互补氢键相互作用,P4和PCBP之间的自组装可用于控制和稳定共混物形态。通过1 H NMR和UV-vis光谱以及光学和原子力显微镜(AFM)研究了溶液和固态中的这些相互作用。采用P4的太阳能电池混合并测试了不同重量比的PCBP和苯基-C61-丁酸甲酯(PCBM)。在由P4 / PCBP混合物(10/8重量)和P4 / PCBP / PCBM三元混合物(10/4/4重量)作为活性层制成的器件中观察到了最佳的功率转换效率(PCE)。通过老化测试详细研究了这些太阳能电池的热稳定性,并通过吸收光谱,光学显微镜,AFM和X射线分析密切监测了相应的形态变化。P4之间的“三点”互补氢键相互作用与PCBP结合嵌段聚合物自组装,发现不仅可以显着提高太阳能电