1,3-dimethyl-2-imidazolidinone 도핑과 후처리 공정에 따른 전도성 고분자 PEDOT : PSS의 전기적 특성 향상과 유기 발광 다이오드로의 적용

Abstract

Highly conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) s) are doped with a new solvent 1,3-dimethyl-2-imidazolidinone (DMI) and are optimized using solvent Post-Treatment. The DMI doped PEDOT:PSS films show significantly enhanced conductivities up to 812.1 S cm−1. The sheet resistance of the PEDOT:PSS films doped with DMI is further reduced by various solvent post-treatment. The effect of solvent Post-Treatment on DMI doped PEDOT:PSS films is investigated and is shown to reduce insulating PSS in the conductive films. The solvent post-treated PEDOT:PSS films are successfully employed as transparent electrodes in white OLEDs. It is shown that the efficiency of OLEDs with the optimized DMI doped PEDOT:PSS films is higher than that of reference OLEDs doped with a conventional solvent (ethylene glycol). The results present that the optimized PEDOT:PSS films with the new solvent of DMI can be a (PEDOT:PSS) films as transparent electrodes for organic light-emitting diodes (OLEDpromising transparent electrode for low-cost, efficient ITO-free white OLED