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A Facile Route to Efficient, Low‐Cost Flexible Organic Light‐Emitting Diodes: Utilizing the High Refractive Index and Built‐In Scattering Properties of Industrial‐Grade PEN Substrates
Author(s) -
Kim Eunhye,
Cho Hyunsu,
Kim Kyoohyun,
Koh TaeWook,
Chung Jin,
Lee Jonghee,
Park YongKeun,
Yoo Seunghyup
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201404862
Subject(s) - oled , materials science , polyethylene naphthalate , optoelectronics , refractive index , substrate (aquarium) , structuring , diode , high refractive index polymer , scattering , optics , nanotechnology , polyethylene terephthalate , composite material , layer (electronics) , oceanography , physics , finance , geology , economics
An industrial‐grade polyethylene naphthalate (PEN) substrate is explored as a simple, cost‐effective platform for high‐efficiency organic light‐emitting diodes (OLEDs). Its high refractive index, combined with the built‐in scattering properties inherent to the industrial‐grade version, allows for a significant enhancement in outcoupling without any extra structuring or special optical elements. Flexible, color‐stable OLEDs with efficiency close to 100 lm W −1 are demonstrated.