基于二甲氧基乙醇处理聚3,4-乙烯二氧噻吩/聚苯乙烯磺酸盐做透明电极在有机太阳能电池中的应用

Application of PEDOT:PSS as Transparent Electrode in Organic Solar Cell Based on 2-Methoxyethanol Treatment

聚3,4-乙烯二氧噻吩/聚苯乙烯磺酸盐(PEDOT:PSS)具有优异的光电性能,目前研究者尝试用PEDOT:PSS材料来取代常用透明电极氧化铟锡(ITO),由于未经处理过的PEDOT:PSS电导率极低,目前急需寻找到新的方法来提高PEDOT:PSS的电导率。本文使用了热(130℃)二甲氧基乙醇多次处理PEDOT:PSS薄膜,结果表明随着处理次数的增加,PEDOT:PSS薄膜电阻逐渐减小。采用了原子力扫描电镜(AFM)和X射线衍射(XRD)等表征手段,发现热二甲氧基乙醇溶剂处理能有效的去除PSS,从而提升了薄膜的电导率。经过热二甲氧基乙醇溶剂处理六次后的品质因素(FoM)高达51.61,并将热二甲氧基乙醇处理六次后的PEDOT:PSS薄膜作为无ITO有机太阳能电池的透明电极,光电转化效率为2.05%,达到了ITO电极的83.67%。

Poly(3,4ethylenedioxythiophene)/polystyrene sulfonate(PEDOT:PSS)has excellent optoelectronic properties.Currently,research-ers are attempting to replace the commonly used transparent electrode indium tin oxide(ITO)with PEODOT:PSS material.Due to the extremely low conductivity of untreated PEDOT:PSS,there is an urgent need to find new methods to improve the conductivity of PEDOT:PSS.This article uses ther-mal(130℃)dimethoxyethanol to treat poly(3,4ethylenedioxythiophene):poly(styrene sulfonic acid)(PEDOT:PSS)thin films multiple times.The re-sults show that with the increase of treatment times,the resistance of PEDOT:PSS thin films gradually decreases.By using atomic force scanning elec-tron microscopy(AFM),Xray diffraction(XRD)four probes,and AFM characterization methods,it was found that thermal dimethyl ethanol solvent treatment can effectively remove PSS,thereby improving the conductivity of the film.The quality factor(FoM)of ITO free organic solar cell is 51.61 after six times of thermal dimethoxyethanol treatment,and the PEDOT:PSS film after six times of thermal dimethoxyethanol treatment is used as the transparent electrode of ITO free organic solar cell,and the photoelectric conversion efficiency is 2.05%,reaching 83.67%of ITO electrode.