合成条件及二次掺杂剂对PEDOT／PSS水分散液电导率的影响  

Effects of Synthesis Conditions and Second Doping Agents on the Conductivity of PEDOT/PSS Aqueous Dispersion

作　　者：县泽宇 李昕一[1] 郭方方[1] 郑一平[1] 

机构地区：[1]北京服装学院材料科学与工程学院,服装材料研究开发与评价北京市重点实验室,北京100029

出　　处：《北京服装学院学报（自然科学版）》2017年第1期18-25,共8页Journal of Beijing Institute of Fashion Technology：Natural Science Edition

基　　金：国家自然科学基金项目(20974005、21544002);北京市教委科技重点项目(KZ201410012017);北京服装学院科学研究提升计划培育项目(2014AL-04)

摘　　要：为提高聚(3,4-乙撑二氧噻吩)/聚对苯乙烯磺酸(PEDOT/PSS)水分散液的稳定性和电导率,研究了聚合时的搅拌速率和掺杂剂PSS用量对PEDOT/PSS水分散液导电性能和稳定性的影响,发现最佳搅拌速率为720 r/min,PSS的最佳含量为PSS与EDOT的质量比为3∶1.同时,研究了聚乙二醇200(PEG 200)、PEG 400、二甲基亚砜(DMSO)、乙二醇(EG)和山梨醇作为二次掺杂剂对PEDOT/PSS水分散液电导率的影响.结果表明,添加一定量的二次掺杂剂均可以提高PEDOT/PSS水分散液的电导率,其中山梨醇的效果最好,当添加质量分数为9%的山梨醇时,PEDOT/PSS的薄膜电导率从0.45 S/cm增加到51.26 S/cm,这主要是因为山梨醇的加入使得PEDOT主链由苯式结构转变为醌式结构,更有利于载流子的迁移.In order to improve the conductivity and stability of poly （3,4-ethylenedioxythiophene） / polystyrene sulfonic acid （PEDOT/PSS） aqueous dispersion, the influence of stirring ratein poly- merization and the amount of dopant, PSS, on the conductivity and stability of （PEDOT）/PSS a- queous dispersion has been investigated. The results show that the optimal stirring rate is 720r/min and the optimal mass ratio of PSS to EDOT is 3： 1. In addition, the influence of using polyethylene glycols （PEG200, PEG400）, dimethyl sulfoxide （DMSO）, ethylene glycol （EG） and sorbitol as second dopants on the conductivity of PEDOT/PSS aqueous dispersion were also investigated. It was found that addition of a certain amount of those second dopants could also improve the conductivity of PEDOT/PSS aqueous dispersion. The best result was observed for sorbitol. Upon Addition of 9% sorbitol, the film conductivity of PEDOT/PSS increases from 0.45 S/cm to 51.26 S/cm, which can mainly be attributed to that the addition of sorbitol changes the backbone of PEDOT from benzene structure into quinoid structure, which facilitates the migration of carriers.

关 键 词：导电聚合物 聚(3 4-乙撑二氧噻吩)/聚对苯乙烯磺酸 电导率 二次掺杂剂 

分 类 号：O646[理学—物理化学]