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학술지 Design of White Tandem Organic Light-emitting Diodes for Full-color Microdisplay with High Current Efficiency and High Color Gamut
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저자
조현수, 주철웅, 최수경, 강찬모, 김기현, 신진욱, 권병화, 이현구, 변춘원, 조남성
발행일
202112
출처
ETRI Journal, v.43 no.6, pp.1093-1102
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.2020-0321
협약과제
21ZB1200, ICT 소재·부품·장비 자립기술 및 도전기술 개발, 황치선
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
color gamut, microdisplay, organic light-emitting diode, tandem OLED, white OLED
KSP 제안 키워드
Augmented reality(AR), Blue spectrum, High current, High-resolution, Optical simulation, Organic light-emitting diodes(OLEDS), Tandem structure, Virtual Reality(VR), color filter, color gamut, current efficiency
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