Negative mold transfer patterned conductive polymer electrode for flexible organic light-emitting diodes

Hyun Jun Lee, Tae Hyun Park, Jin Hwan Choi, Eun Ho Song, Se Joong Shin, Hakkoo Kim, Kyung Cheol Choi, Young Wook Park, Byeong Kwon Ju

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

We demonstrate flexible organic light-emitting diodes (FOLEDs) that use flexible conductive polymer electrodes patterned by negative mold transfer printing (nMTP). Because pristine poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) is unsuitable for nMTP owing to problems with wettability, additives are used to improve the surface wetting properties of the polymer on the mold to successfully employ nMTP. Moreover, the additives improve the conductivity of the polymer electrode. FOLEDs fabricated with the modified PEDOT:PSS using nMTP exhibit electrical properties comparable to those of a device having an indium tin oxide (ITO) anode. These results show that the highly conductive PEDOT:PSS patterned by nMTP can be used as transparent high-resolution electrodes in low-cost ITO-free FOLEDs.

Original languageEnglish
Pages (from-to)416-422
Number of pages7
JournalOrganic Electronics
Volume14
Issue number1
DOIs
Publication statusPublished - 2013 Jan

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MEST) (CAFDC-20120000816), the NRF (No. 2012R1A6A3A04039396) Project of the MEST, and the IT R&D Program of MKE/KEIT (No. 2009-F-016-01, Development of Eco-Emotional OLED Flat-Panel Lighting). The authors thank the staff of KBSI for technical assistance.

Keywords

  • Conductive polymer
  • Flexible organic light-emitting diode (FOLED)
  • Micropatterning
  • Negative mold transfer printing (nMTP)
  • Transparent

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Biomaterials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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