ETRI Journal

  • 제43권6호
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  • Pages.1093-1102
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  • 2021
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  • 1225-6463(pISSN)
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  • 2233-7326(eISSN)
한국전자통신연구원 (Electronics and Telecommunications Research Institute)
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Design of white tandem organic light-emitting diodes for full-color microdisplay with high current efficiency and high color gamut

  • Cho, Hyunsu (ICT Creative Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Joo, Chul Woong (ICT Creative Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Choi, Sukyung (ICT Creative Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Kang, Chan-mo (ICT Creative Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Kim, Gi Heon (ICT Creative Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Shin, Jin-Wook (ICT Creative Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Kwon, Byoung-Hwa (ICT Creative Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Lee, Hyunkoo (Department of Electronics Engineering and Institute of Advanced Materials and Systems, Sookmyung Women's University) ;
  • Byun, Chun-Won (ICT Creative Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Cho, Nam Sung (ICT Creative Research Laboratory, Electronics and Telecommunications Research Institute)
  • 투고 : 2020.08.20
  • 심사 : 2021.05.26
  • 발행 : 2021.12.01
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초록

Microdisplays based on organic light-emitting diodes (OLEDs) have a small form factor, and this can be a great advantage when applied to augmented reality and virtual reality devices. In addition, a high-resolution microdisplay of 3000 ppi or more can be achieved when applying a white OLED structure and a color filter. However, low luminance is the weakness of an OLED-based microdisplay as compared with other microdisplay technologies. By applying a tandem structure consisting of two separate emission layers, the efficiency of the OLED device is increased, and higher luminance can be achieved. The efficiency and white spectrum of the OLED device are affected by the position of the emitting layer in the tandem structure and calculated via optical simulation. Each white OLED device with optimized efficiency is fabricated according to the position of the emitting layer, and red, green, and blue spectrum and efficiency are confirmed after passing through color filters. The optimized white OLED device with color filters reaches 97.8% of the National Television Standards Committee standard.

키워드

과제정보

This research was supported by the Electronics and Telecommunications Research Institute (ETRI) grant funded by the Korean government (21ZB1200) and the Institute of Information & Communications Technology Planning & Evaluation (IITP) grant funded by the Korea government (MSIT) (2018-0-01035).

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