Highly Conductive PEDOT:PSS Films with 1, 3‐Dimethyl‐2‐Imidazolidinone as Transparent Electrodes for Organic Light‐Emitting Diodes. Issue 17 (5th July 2016)

• Record Type: Journal Article
• Authors: Kim, Jin Hee; Joo, Chul Woong; Lee, Jonghee; Seo, Yoon Kyung; Han, Joo Won; Oh, Ji Yoon; Kim, Jong Su; Yu, Seunggun; Lee, Jae Hyun; Lee, Jeong‐Ik; Yun, Changhun; Choi, Bum Ho; Kim, Yong Hyun
• Is Part Of: Macromolecular rapid communications. Volume 37:Issue 17(2016)
• Page Start: 1427
• Page End: 1433
• Publication Date: 2016-07-05
• Subjects: conductive polymers -- organic light‐emitting diodes -- PEDOT:PSS -- transparent electrodes -- 1, 3‐dimethyl‐2‐imidazolidinone; Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.201600144
• Languages: English
• ISSNs: 1022-1336

Abstract

Abstract : Highly conductive poly(3, 4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films as transparent electrodes for organic light‐emitting diodes (OLEDs) 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 posttreated 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 promising transparent electrode for low‐cost, efficient ITO‐free white OLEDs. Abstract : The new solvent 1, 3‐dimethyl‐2‐imidazolidinone (DMI), which greatly improves the conductivity of poly(3, 4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films, is reported. In addition, solvent post‐treatment significantly reduces sheet resistance of PEDOT:PSS films. The white organic light‐emitting diodes (OLEDs) based on the optimized DMI doped PEDOT:PSS films show an improved device efficiency. These results illustrate the feasibility applying posttreated PEDOT:PSS films as alternative transparent electrodes for low‐cost indium tin oxide‐free OLEDs.