title: Improvement of light extraction in organic light-emitting diodes using a corrugated microcavity.
abstract: Based on the phase separation effect in the film formation process of Polystyrene and Poly(methyl methacrylate) blend solution, bottom-emitting organic light-emitting diodes (OLEDs) with corrugated microcavity was demonstrated. This device exhibited high efficiency, broad spectra and Lambertian angular emission. Compared with the traditional bottom-emitting OLEDs with ITO anode and the planar microcavity OLEDs, about 57% and 41% enhancement for external quantum efficiency was achieved in this corrugated microcavity OLEDs respectively. This improvement can be understood by the scattering effect of the quasi-periodic characteristic of this corrugated microcavity which reduces the optical loss at surface plasmon polariton modes and wave-guided modes. This work provides a simple as well as efficienct method to recover trapped light in OLEDs, which will benefit the low cost fabrication process.
authors.forename: Bo
authors.initials: B
authors.lastname: Jiao
authors.forename: Yue
authors.initials: Y
authors.lastname: Yu
authors.forename: Yang
authors.initials: Y
authors.lastname: Dai
authors.forename: Xun
authors.initials: X
authors.lastname: Hou
authors.forename: Zhaoxin
authors.initials: Z
authors.lastname: Wu