상세정보
학술지
Stable Angular Emission Spectra in White Organic Light-emitting Diodes using Graphene/PEDOT:PSS Composite Electrode
- 발행일
- 201705
- 출처
- Optics Express, v.25 no.9, pp.9734-9742
- ISSN
- 1094-4087
- 출판사
- Optical Society of America(OSA)
- 협약과제
- 16PB1700, 그래핀 소재의 OLED 투명전극과 박막봉지 적용을 위한 기판 사이즈 5.5세대 이상의 그래핀 필름 및 OLED 소자/패널 기초 및 응용 기술 개발, 이정익
- 초록
- In this work, we suggest a graphene/poly (3, 4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) composite as a transparent electrode for stabilizing white emission of organic light-emitting diodes (OLEDs). Graphene/PEDOT:PSS composite electrodes have increased reflectance when compared to graphene itself, but their reflectance is still lower than that of ITO itself. Changes in the reflectance of the composite electrode have the advantage of suppressing the angular spectral distortion of white emission OLEDs and achieving an efficiency of 16.6% for white OLEDs, comparable to that achieved by graphene-only electrodes. By controlling the OLED structure to compensate for the two-beam interference effect, the CIE color coordinate change (?봷y) of OLEDs based on graphene/PEDOT:PSS composite electrodes is 0.018, less than that based on graphene-only electrode, i.e., 0.027.
- KSP 제안 키워드
- 4-Ethylenedioxythiophene(EDOT), Composite Electrode, Interference effects, Organic light-emitting diodes(OLEDS), Polystyrene sulfonate, Spectral distortion, Two-beam interference, White organic light-emitting diodes, color coordinates, emission spectra, light-emitting diode(LED)