ETRI-Knowledge Sharing Plaform

ENGLISH

성과물

논문 검색
구분 SCI
연도 ~ 키워드

상세정보

학술지 Organic Wrinkles Embedded in High-index Medium as Planar Internal Scattering Structures for Organic Light-emitting Diodes
Cited 19 time in scopus Download 12 time Share share facebook twitter linkedin kakaostory
저자
조현수, 김은혜, 문제현, 주철웅, 김응준, 박승구, 이종희, 유병곤, 이정익, 유승협, 조남성
발행일
201707
출처
Organic Electronics, v.46, pp.139-144
ISSN
1566-1199
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.orgel.2017.03.040
협약과제
17ZB1900, 초저가 플렉서블 Lighting Surface 기술 개발, 유병곤
초록
Organic wrinkle structures are investigated as an internal scattering layer for the fabrication of highly efficient organic light-emitting diodes (OLEDs). The solution-processed wrinkle structures are planarized with a high-index layer, resulting in a reduced surface roughness and optical haze simultaneously. The OLED device including the wrinkle structures achieved external quantum efficiency (EQE) of 24.2%, corresponding to a 1.24 time enhancement with respect to that of a control device having no internal scattering layer. By attaching a micro lens array (MLA) or a half ball lens (HBL) on the external surface of the substrate, the proposed device exhibits an EQE of 30.5% (1.56 time enhancement) and 41.8% (2.14 time enhancement), respectively. Randomness of the distributed wrinkle structures is shown to provide additional benefits of reduced angular spectral distortion and Lambertian-like emission properties. Trans-scale optical simulation combining wave-optics and the geometrical effect are used for the quantitative analysis of the emission characteristics of the device.
키워드
Internal scattering, Light extraction, Organic light-emitting diode, Wrinkle
KSP 제안 키워드
Ball lens, Control device, External Quantum Efficiency, External surface, High index, Microlens array, Optical simulation, Organic light-emitting diodes(OLEDS), Scattering layer, Solution-processed, Spectral distortion