Highly Conductive PEDOT:PSS Films with 1,3-Dimethyl-2-Imidazolidinone as Transparent Electrodes for Organic Light-Emitting Diodes

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 fi...

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Bibliographic Details
Published in:Macromolecular rapid communications. 2016-09, Vol.37 (17), p.1427-1433
Main 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
Format: Article
Language:English
Subjects:
1,3‐dimethyl‐2‐imidazolidinone
3-dimethyl-2-imidazolidinone
Bridged Bicyclo Compounds, Heterocyclic - chemistry
conductive polymers
Conductivity
Electric Conductivity
Electrical resistivity
Electrodes
Ethylene glycol
Imidazoles - chemistry
Indium
Light
Molecular Structure
Organic light emitting diodes
Particle Size
PEDOT:PSS
Polymers - chemistry
Polystyrenes - chemistry
Solvents
Surface Properties
transparent electrodes
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Summary: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. 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.
ISSN:1022-1336
1521-3927
DOI:10.1002/marc.201600144