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학술지 Random Nanostructure Scattering Layer for Suppression of Microcavity Effect and Light Extraction in OLEDs
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저자
신진욱, 조두희, 문제현, 주철웅, 이종희, 허진우, 박승구, 한준한, 조남성, 황주현, 추혜용, 이정익
발행일
201406
출처
Optics Letters, v.39 no.12, pp.3527-3530
ISSN
0146-9592
출판사
Optical Society of America(OSA),
DOI
https://dx.doi.org/10.1364/OL.39.003527
협약과제
14PB1200, 에너지 절감을 위한 외광효율이 최대 100% 향상된 OLED용 광추출 기초 원천기술 개발, 이정익
초록
In this study, we investigated the effect of a random nanostructure scattering layer (RSL) on the microcavity and light extraction in organic light emitting diodes (OLEDs). In the case of the conventional OLED, the optical properties change with the thickness of the hole transporting layer (HTL) because of the presence of a microcavity. However, OLEDs equipped with the an RSL showed similar values of external quantum efficiency and luminous efficacy regardless of the HTL thickness. These phenomena can be understood by the scattering effect because of the RSL, which suppresses the microcavity effect and extracts the light confined in the device. Moreover, OLEDs with the RSL led to reduced spectrum and color changes with the viewing angle. © 2014 Optical Society of America.
KSP 제안 키워드
Color changes, External Quantum Efficiency, Hole transporting layer, Microcavity effect, Organic light-emitting diodes(OLEDS), Properties change, Scattering effect, Scattering layer, light extraction, light-emitting diode(LED), luminous efficacy