Print Email Facebook Twitter Light Management in Flexible OLEDs Title Light Management in Flexible OLEDs Author Harkema, S. Pendyala, R.K. Geurts, C.G.C. Helgers, P.L.J. Levell, J.W. Wilson, J.S. MacKerron, D. Publication year 2014 Abstract Organic light-emitting diodes (OLEDs) are a promising lighting technology. In particular OLEDs fabricated on plastic foils are believed to hold the future. These planar devices are subject to various optical losses, which requires sophisticated light management solutions. Flexible OLEDs on plastic substrates are as prone to losses related to wave guiding as devices on glass. However, we determined that OLEDs on plastic substrates are susceptible to another loss mode due to wave guiding in the thin film barrier. With modeling of white polymer OLEDs fabricated on PEN substrates, we demonstrate that this loss mode is particularly sensitive to polarized light emission. Furthermore, we investigated how thin film barrier approaches can be combined with high index light extraction layers. Our analysis shows that OLEDs with a thin film barrier consisting of an inorganic/organic/inorganic layer sequence, a low index inorganic negatively affects the OLED efficiency. We conclude that high index inorganics are more suitable for usage in Subject Mechatronics, Mechanics & MaterialsTFT - Thin Film TechnologyTS - Technical SciencesElectronicsIndustrial InnovationEfficiencyLight ExtractionReflectivityFlexibleLarge AreaOLEDThin film barrier To reference this document use: http://resolver.tudelft.nl/uuid:403df4d5-618a-43bb-b88a-3912eb939543 DOI https://doi.org/10.1117/12.2061777 TNO identifier 533802 Source Proceedings of SPIE, 9183, 12 Article number 91831H Document type conference paper Files To receive the publication files, please send an e-mail request to TNO Library.