Journal of the Semiconductor & Display Technology (반도체디스플레이기술학회지)

The Korean Society Of Semiconductor & Display Technology (한국반도체디스플레이기술학회)
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Slot-Die Coating of PEDOT : PSS for Large-Area OLED Lighting Sources

대면적 OLED 면광원을 위한 PEDOT : PSS 슬롯다이 코팅

  • Choi, Kwang-Jun (School of Electrical & Electronic & Communication Engineering, Korea University of Technology and Education) ;
  • Lee, Jin-Young (School of Electrical & Electronic & Communication Engineering, Korea University of Technology and Education) ;
  • Jeon, Kyung-Jun (School of Electrical & Electronic & Communication Engineering, Korea University of Technology and Education) ;
  • Yoo, Su-Ho (School of Electrical & Electronic & Communication Engineering, Korea University of Technology and Education) ;
  • Park, Jong-Woon (School of Electrical & Electronic & Communication Engineering, Korea University of Technology and Education) ;
  • Seo, Hwa-Il (School of Electrical & Electronic & Communication Engineering, Korea University of Technology and Education) ;
  • Seo, Yu Seok (Advanced Technology Research Team, YOULCHON CHEMICAL, CO., LTD.)
  • 최광준 (한국기술교육대학교 전기.전자.통신공학부) ;
  • 이진영 (한국기술교육대학교 전기.전자.통신공학부) ;
  • 전경준 (한국기술교육대학교 전기.전자.통신공학부) ;
  • 유수호 (한국기술교육대학교 전기.전자.통신공학부) ;
  • 박종운 (한국기술교육대학교 전기.전자.통신공학부) ;
  • 서화일 (한국기술교육대학교 전기.전자.통신공학부) ;
  • 서유석 ((주)율촌화학 기술연구소 선행연구팀)
  • Received : 2015.03.06
  • Accepted : 2015.03.23
  • Published : 2015.03.31
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Abstract

We have fabricated poly(3,4-ethylenedioxythiophene) : poly(4-styrenesulfonate) (PEDOT : PSS) thin films using a slotdie coater for the applications of OLED lightings. It is demonstrated that the properties of slot-die coated PEDOT : PSS films are comparable with those of spin-coated ones. Namely, the average and peak-to-peak roughness of the slot-die coated 50-nm-thick PEDOT : PSS film are measured to be as low as 0.247 nm and 1.3 nm, respectively. Moreover, we have obtained excellent thickness uniformity (~1.91%). With the slot-die coated PEDOT : PSS films, we have fabricated green phosphorescent OLED devices. For comparison, we have also fabricated OLED devices with spin-coated PEDOT : PSS films. Both show almost no discrepancy in device performance. The power efficiency (25.4 lm/W) and emission uniformity (77%) of OLEDs with slot-die coated PEDOT : PSS films are shown to be slightly lower than those (27.3 lm/W, 80%) of OLEDs with spin-coated PEDOT : PSS films at the luminance of 1,000nit, increasing the feasibility of using a slot-die coating process for the fabrication of large-area OLED lighting sources at a competitive price.

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References

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