Print Email Facebook Twitter High-performance thin-film encapsulation for organic light-emitting diodes Title High-performance thin-film encapsulation for organic light-emitting diodes Author van de Weijer, P. Bouten, P.C.P. Unnikrishnan, S. Akkerman, H.B. Michels, J.J. van Mol, T.M.B. Publication year 2017 Abstract Organic light-emitting diodes degrade rapidly by means of local cathode oxidation when exposed to the ambient atmosphere, resulting in visible non-emissive areas called black spots. High performance inorganic based encapsulations are required to protect the OLED. We have applied a hybrid thin-film encapsulation stack consisting of two inorganic barrier layers of silicon nitride deposited at low temperature with an organic layer in between. The resulting water permeation mechanism into the OLED is solely by means of lateral pinhole-to-pinhole transport. With the application of CaO nanoparticles in the organic layer the lateral water transport rate is reduced and we show that black spot formation in 8 cm2 OLEDs is delayed by 6000 h at accelerated climate conditions of 60°C/90% relative humidity. This is estimated to correspond to 20 years at ambient conditions. Subject Nano TechnologyHOL - HolstTS - Technical SciencesMaterialsIndustrial InnovationOLEDsThin-film encapsulationWater barrier To reference this document use: http://resolver.tudelft.nl/uuid:fc2b1420-8586-430a-9122-9a5f73bff915 DOI https://doi.org/10.1016/j.orgel.2017.02.009 TNO identifier 753472 Publisher Elsevier, Amsterdam ISSN 1566-1199 Source Organic Electronics: physics, materials, applications, 44, 94-98 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.