title: 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.
abstract: 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.
authors: Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305 - 701, Republic of Korea.
authors: Eunhye
authors: E
authors: Kim
authors: Hyunsu
authors: H
authors: Cho
authors: Kyoohyun
authors: K
authors: Kim
authors: Tae-Wook
authors: TW
authors: Koh
authors: Jin
authors: J
authors: Chung
authors: Jonghee
authors: J
authors: Lee
authors: YongKeun
authors: Y
authors: Park
authors: Seunghyup
authors: S
authors: Yoo
keywords: bulk scattering; high-refractive-index substrates; light extraction; organic light-emitting diodes (OLEDs); polyethylene naphthalate (PEN)