Berlin 2005 – scientific programme

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SYOO: Organic Optoelectronics and Photonics

SYOO 6: Poster

SYOO 6.12: Poster

Monday, March 7, 2005, 18:00–20:00, Poster TU A

Light Extraction via Guided Leaky Modes in Organic Light Emitting Devices — •Nils Reinke, Andreas Opitz, and Wolfgang Brütting — Experimentalphysik IV, Universität Augsburg, 86135 Augsburg, Germany

Conventionally, a large fraction of the light generated in organic light emitting devices is trapped inside the device and lost due to internal total reflection and side emission or absorption by the organic layers. The latter process can be suppressed by implementing periodic corrugations (i.e. distributed feedback gratings) to scatter out light guided in the organic.

In this work, devices were fabricated consisting of an organic multilayer system sandwiched between two metallic electrodes. In these devices the metal film on the substrate can enhance the leakage of guided modes into the substrate. Consequently, light can be effectively extracted. The influences of thickness variations on the emission characteristics of the devices were studied both experimentally and theoretically.

Simultaneously, the two reflecting electrodes form a microcavity and the emitted light is spectrally filtered, giving prospects for laser resonator applications.