Molecular doping for conjugated polymers is an important tool for modifying their electrical and optical properties, which extends conjugated polymer's application to various optoelectronic devices. Sequential doping, i.e., dopant diffusion into a pre-deposited polymer film is one of the most widely used molecular doping methods. To improve dopant diffusion efficiency, solvent engineering for conjugated polymers has been studied, however, less attention has been given to solvent selection for the dopant, which is equally important as dopant carriers. In this study, we suggest a selection rule for dopant solvents in the application of sequential doping based on the systemic characterizations of Hansen solubility parameters, UV–Vis absorption spectra, and electrical conductivity. Furthermore, by applying the rule to different conjugated polymers, we demonstrate the wide applicability of our findings on dopant solvent selection.

共轭聚合物的分子掺杂是修饰其电学和光学性质的重要工具，这将共轭聚合物的应用扩展到各种光电器件。顺序掺杂，即，掺杂剂扩散到预沉积的聚合物膜中是最广泛使用的分子掺杂方法之一。为了提高掺杂剂扩散效率，已经研究了用于共轭聚合物的溶剂工程，但是，对于掺杂剂的溶剂选择的关注较少，这与掺杂剂载体同样重要。在这项研究中，我们基于Hansen溶解度参数，UV-Vis吸收光谱和电导率的系统表征，提出了在顺序掺杂应用中选择掺杂剂溶剂的规则。此外，通过将规则应用于不同的共轭聚合物，