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通过微波辅助炔、醛、胺三组分一锅法聚合反应合成了一系列基于萘并二酰亚胺的聚合物P1~P4,并通过核磁表征确认其结构.目标聚合物的光物理与电化学性能研究表明,由于聚合物主链共轭被打断,聚合物的吸收和能级主要由其重复单元决定.通过开尔文探针与电子顺磁共振谱研究了聚合物侧链与主链胺基不同的化学环境对其电极功函调节以及自掺杂行为的影响.发现由于主链胺基与苄基、炔丙基相连,胺基氮的电子云密度显著降低,导致聚合物形成界面偶极能力减弱,从而使其电极功函调节能力与自掺杂强度都大大降低.所有聚合物中P1具有良好的醇溶性,可被用于聚合物太阳电池的阴极界面层.以PTB7-Th:PC71BM为活性层,P1为阴极界面层的聚合物太阳电池器件的光电转换效率达到9.34%.
A series of naphthalimide-based polymers P1 ~ P4 were synthesized by microwave-assisted alkyne, aldehyde and amine one-pot polymerization, and their structures were confirmed by NMR.Photophysics and Electrochemistry of Target Polymers The study of chemical properties shows that the absorption and energy level of the polymer are mainly determined by the repeat units due to the interruption of the conjugation of the main chain of the polymer.The Kelvin probe and electron paramagnetic resonance spectroscopy were used to study the interaction between the polymer side chain and the main chain amine The effect of different chemical environments on the electrode work function and self-doping behavior was also investigated. It was found that the electron cloud density of the amino nitrogen decreased significantly due to the attachment of the backbone amine groups to benzyl and propargyl groups, resulting in the formation of interface even Polarization ability is weakened so that its electrode work function and self-doping intensity are greatly reduced.P1 has good alcohol solubility in all polymers and can be used in the cathode interface layer of polymer solar cells.The PTB7-Th: PC71BM is the active layer, P1 is the cathode interface layer of the polymer solar cell device photoelectric conversion efficiency of 9.34%.