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학술지 We Want Our Photons Back: Simple Nanostructures for White Organic Light-Emitting Diode Outcouplin
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저자
Yong Hyun Kim, 이종희, Won Mok Kim, Cornelius Fuchs, Simone Hofmann, Hong-Wei Chang, Malte C. Gather, Lars Muller-Meskamp, Karl Leo
발행일
201405
출처
Advanced Functional Materials, v.24 no.17, pp.2553-2559
ISSN
1616-301X
출판사
John Wiley & Sons
DOI
https://dx.doi.org/10.1002/adfm.201303401
협약과제
14PB2200, AMOLED TV용 soluble TFT 및 화소 형성 소재/공정 기술 개발, 이종희
초록
Conventional planar organic light-emitting diodes (OLEDs) suffer from poor light extraction due to the total internal reflection at the waveguided interfaces. Therefore, the development of efficient light extraction structures is of great necessity and significance to realize practical applications in large area and cost-effective light sources. In this paper, a high-performance internal light outcoupling system for white OLEDs with spontaneously formed metal oxide nanostructures is developed. The fabrication process of the outcoupling system is simple and can be scaled to large area manufacturing. The enhancement of external quantum efficiency in white OLEDs comprising the outcoupling system reaches a factor of 1.7, and it is further increased to 2.9 when a hemispherical lens is employed. Together with the improvement of light extraction, excellent color stability over broad viewing angles is achieved. Conventional planar OLEDs suffer from poor light extraction due to the total internal reflection at internal interfaces. In this paper, a high-performance internal light outcoupling system for white OLEDs with spontaneously formed metal oxide nanostructures is developed. In addition to the huge improvement of light extraction, the novel nanostructures lead to excellent color stability over broad viewing angles. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
키워드
color stability, conductive polymer electrodes, light extraction, organic light-emitting diodes, organic semiconductors
KSP 제안 키워드
Co. KGaA, Color stability, External Quantum Efficiency, High performance, Internal interface, Light outcoupling, Light sources, Metal oxide nanostructures, Metal-oxide(MOX), Organic light-emitting diodes(OLEDS), Organic semiconductor