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Journal Article
Enhanced Electrical Properties of PEDOT:PSS Films using Solvent Treatment and its Application to ITO-free Organic Light-emitting Diodes
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- Authors
- Yoon Kyung Seo, Chul Woong Joo, Jonghee Lee, Joo Won Han, Dong Jin Lee, Siti Aisyah Nurmaulia Entifar, Soukyoon Kim, Nam Sung Cho, Yong Hyun Kim
- Issue Date
- 2017-07
- Citation
- Journal of Luminescence, v.187, pp.221-226
- ISSN
- 0022-2313
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Project Code
- 16PB1800, Development of Soluble TFT and Pixel Formation Materials/Process Technologies for AMOLED TV, Lee Jonghee
- Abstract
- Highly conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films are prepared by introducing a new solvent 2-ethoxyethanol and are optimized by acid-free solvent post treatment. The behavior of samples are investigated with various coating conditions. The change of electrical performance for 2-ethoxyethanol added PEDOT:PSS films with various post treatment methods is studied. Upon post treatment, the sheet resistance greatly decreases attributed to a structural change with removal of insulating PSS in the film. Based on these conductive films, we demonstrate efficient ITO-free green phosphorescent organic light-emitting diodes (OLEDs). The efficiency of OLEDs with post-treated PEDOT:PSS electrodes is greater than that of OLEDs with untreated PEDOT:PSS electrodes. The results illustrate a promising future for flexible, low-cost, ITO-free OLEDs employing PEDOT:PSS electrodes optimized by 2-ethoxyethaol with acid-free solvent post treatment.
- KSP Keywords
- 2-ethoxyethanol, 4-Ethylenedioxythiophene(EDOT), 4-ethylenedioxythiophene):poly(4-styrenesulfonate)(PEDOT:PSS), Conductive film, Free solvent, ITO-free, Low-cost, Organic light-emitting diodes(OLEDS), Post-treatment, Solvent treatment, Structural changes