Abstract
Photons trapped in the form of waveguide (WG) modes associated with the organic/organic interface and in the form of surface plasmon polariton (SPP) modes associated with the metallic electrode/organic interface result in a large energy loss in organic light-emitting devices (OLEDs). We demonstrate the efficient outcoupling of WG and SPP modes by integrating a wavelength-scale periodically corrugated conductive photoresist into the device structure. The corrugated OLEDs with appropriate grating periods lead to a 15.9% increase in efficiency compared with the planar OLEDs. The efficient outcoupling of the WG and SPP modes is verified by the numerical simulation of both the emission spectra and the field distribution.
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