低共熔体掺杂对PEDOT:PSS膜的结构与光学特性的影响

Effect of Deep Eutectic Solvents on Structure and Optical Property of PEDOT:PSS Films

中文关键词: 电化学聚合  聚3,4-乙烯二氧噻吩  低共熔体  掺杂

英文关键词: electrochemical polymerization  poly(3,4-ethylenedioxythiophene)  deep eutectic solvent  doping

中文摘要:

      目的 在水溶液体系中，合成一种性能优良的环境友好型高分子材料。方法 采用低共熔体(DES)与聚苯磺酸钠(PSS)的水溶液为溶剂，3,4-乙烯二氧噻吩(EDOT)为单体，在三电极系统中电化学聚合得到3种DES掺杂的PEDOT:PSS(PEDOT:PSS/DES)。采用傅里叶红外光谱仪与X射线光电子谱仪对薄膜的分子结构特征进行分析，同时利用紫外-可见光谱UV-Vis对薄膜的光学特性进行研究。结果 研究表明，DES掺杂显著促进了薄膜中π-π*跃迁峰的蓝移，提升了薄膜分子中的共轭度，最大光学对比度由0.27提升到0.30以上。结论 DES掺杂可提升薄膜的分子结构共轭度和光电转化能力，为环境友好型高分子材料和新型光电器件的设计和应用提供了有力支持。

英文摘要:

      The work aims to synthesize a high-performance and environmental-friendly polymeric materials in aqueous solutions. Three kinds of doped PEDOT:PSS (PEDOT:PSS/DES) were electrochemically polymerized in aqueous solutions containing sodium polystyrene sulfonate (PSS) and deep eutectic solvents (DES) dopants with 3,4-ethylenedioxythiophene (EDOT) as monomer in three-electrode system. The molecular structure characteristics of the as-prepared polymers were analyzed by Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS), while the optical properties of the film were studied by ultraviolet-visible spectroscopy (UV-Vis). The research results indicated that DES prompted the blueshift of the peak associated with π-π transition and the improvement of conjugate degree. Correspondingly, the maximum absorption value contrast was increased at 0.30 or above from 0.27. In conclusion, DES doping is helpful to improve the molecular conjugate degree and photoelectric conversion characteristics of films and provide strong support for the design and application of new optoelectronic devices.