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학술지 Fab-compatible Nano-lens Array Integration for Optically Efficient Flexible Top-emitting Organic Light-emitting Diodes
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저자
권정윤, 김제한, 박영삼, 조두희, 권오은, 이강미, 이희철, 조남성, 유병곤
발행일
201906
출처
Japanese Journal of Applied Physics, v.58 no.SD, pp.1-6
ISSN
0021-4922
출판사
Japan Society of Applied Physics (JSAP)
DOI
https://dx.doi.org/10.7567/1347-4065/ab0494
협약과제
19HB1500, 디스플레이 일체형 투명 틀렉서블 복합 생체인식 디바이스 핵심기술 개발, 안성덕
초록
This work extends the kinds of organic materials that can form nano-lens arrays (NLAs). We have previously addressed fabrication of a N,N??-di(1-naphthyl)-N,N??-diphenyl-(1,1??-biphenyl)-4,4??-diamine (NPB) NLA and explained the formation mechanism as NPB crystallization and the resulting increase in surface tension. Here, we report a Tris(8-hydroxyquinolinato)aluminum (Alq3) NLA fabricated by the same deposition method as a NPB NLA. Grazing-incidence small-angle X-ray scattering experiments indicate that the formation mechanism of the Alq3 NLA is the same as that of the NPB NLA. Furthermore, this study broadens the application of NLAs from rigid to flexible organic light-emitting diodes (OLEDs). Here, flexible stainless steel-based devices using a low-temperature thermal release film, atomic layer deposition and NPB NLA processes are fabricated and characterized. With a NLA, current efficiency is increased 1.4 times, indicating that fab-compatible NLA technology is also available for flexible OLEDs.