Out-Coupling Efficiency Enhancement of Organic Light Emitting Diode Device by SiO2-UV Hardener Composite Layer
The enhancement of out-coupling efficiency of organic light emitting diode (OLED) using SiO2-polymer composite layers was investigated. The SiO2-polymer composite was made from a SiO2 nanopowder and commercial UV-hardeners. The composite layer was coated on glass by dip-coating method in a SiO2 suspension, followed by spin-coating of 1 μm thick UV-hardener of was found that the optical properties were depend on the quantity of SiO2 nanopowder in the composite layer and dispersion of SiO2 suspension. 194/440 nm size of SiO2 nanopowders were added to the composite layer to enhance the light scattering effect. The OLED device which the SiO2-polymer composite layer was applied showed enhanced out-coupling efficiency around 30%.
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Document Type: Research Article
Publication date: February 1, 2011
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