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학술지 White Organic Light Emitting Diodes with a Random Scattering Layer for an Internal Light Extraction
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저자
신진욱, 문제현, 조두희, 주철웅, 박승구, 이종희, 한준한, 조남성, 조현수, 이정익
발행일
201601
출처
ECS Journal of Solid State Science and Technology, v.5 no.1, pp.R3126-R3130
ISSN
2162-8769
출판사
Electrochemical Society (ECS)
DOI
https://dx.doi.org/10.1149/2.0181601jss
협약과제
15PB1300, 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
A random scattering layer (RSL) containing random nano-structures as the internal light extraction functional layer was introduced into white organic light-emitting diodes (OLEDs) to improve the light extraction efficiency and preserve the white color quality. White OLEDs on the RSL with varying heights of nano-structures were successfully fabricated, and the effects of haze on the characteristics of the OLED device were investigated. The haze and light extraction efficiency were mutually proportional. The RSL equipped white OLEDs exhibited an external quantum efficiency improvement of 41.5% with a low angular spectrum change. The results from our RSL are interpreted as an optical functionality which reduces the internal wave guiding mode due to the scattering effect leading to enhanced device efficiency and stabilized emission spectra, respectively.
KSP 제안 키워드
Angular spectrum, Device efficiency, External Quantum Efficiency, Functional layer, Nano-structures, Organic light-emitting diodes(OLEDS), Scattering effect, Scattering layer, White organic light-emitting diodes, color quality, efficiency improvement