基于高导性醌式小分子电解质阳极界面层有机太阳能电池及其稳定性研究

针对可印刷加工的高导性厚度不敏感的阳极界面层材料缺乏，导致有机太阳能电池无法印刷制备问题，本项目提出利用高导性醌式小分子电解质作为阳极界面层，实现电池的印刷制备。醌式小分子电解质具有共轭平面结构，有利于分子内电荷传输，在合适的堆积条件下还能形成有利于分子间电荷传输的有序堆积膜，可以大幅提高电导率，这为开发高导性厚度不敏感的阳极界面层提供了可能。醌式小分子电解质接有抗衡离子的侧链容易修饰，可以产生优异的溶液加工性和pH中性性质，这为印刷加工提供了可能。本项目通过合理设计醌式小分子电解质的共轭主链和接有抗衡离子的侧链，精细调控分子溶解性、pH值和平面性，进一步通过优化堆积条件，形成有利于分子间电荷传输的有序堆积，显著提高电导率，获得可印刷加工的高导性厚度不敏感的阳极界面层。深刻认识和理解分子结构和堆积方式对电导率的影响，揭示醌式小分子电解质调控电池光伏性能和稳定性的机理，并实现印刷制备电池。

Owing to the lack of high conductivity thickness-insensitive anode interfacial layer material, which leads to the organic solar cells can’t be prepared by printing. In this project, we propose to use high conductive quinoid small molecule electrolyte as anode interfacial layer to realize the printable preparation of stable batteries. Quinoid small molecule electrolyte has conjugate planar structure, which is beneficial for the intramolecular charge transfer, and can form orderly stacking film in favor of intermolecular charge transfer under appropriate stacking conditions, thus dramatically improving the conductivity of the anode interfacial layer. It provides a possibility for the development of highly conductive thickness-insensitive anode interface layer. Because the counter ion is connected with the side chain of quinoid small molecule electrolyte, it is easy to be modified. Therefore, the quinoid small molecule electrolyte may have good solution processing and pH neutral properties, which may provide the possibility of printing processing. Through reasonable designing the main chain and the side chain attached to counter ion of quinoid small molecule electrolyte, fine regulating the molecular solubility, pH and planarity, further optimizing the accumulation conditions to form a favorable structure of intermolecular by orderly stacking, hence significantly increasing the conductivity and acquiring printable processing high conductivity thickness-insensitive anode interfacial layer. Deeply understand the effects of the molecular structure and stacking method on the conductivity, revealing the mechanism of quinoid small molecule electrolyte and regulating the photovoltaic performance and stability of organic solar cells, fabricating the stable cells by printing.