White organic light emitting diodes with enhanced internal and external outcoupling for ultra-efficient light extraction and Lambertian emission
White organic light emitting diodes (WOLEDs) suffer from poor outcoupling efficiencies. The use of Bragg-gratings to enhance the outcoupling efficiency is very promising for light extraction in OLEDs, but such periodic structures can lead to angular or spectral dependencies in the devices. Here we p...
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Veröffentlicht in: | Optics express 2012-11, Vol.20 Suppl 6 (S6), p.A932-A940 |
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Format: | Artikel |
Sprache: | eng |
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