Abstract
We report synthesis of magnetic Fe3O4 nanoparticles (MNPs) based on two phase method and their application in organic light-emitting devices (OLEDs) as blend with emissive Poly∞uorene (PFO) matrix. Two phase method allows to successively synthesizing oleic acid capped MPNs with 5{10nm particle size. Colloidal MNPs can be easily mixed with emissive polymer solutions to obtain a blend for OLED application. The electroluminescence e-ciency increases by doping with MNPs into emissive layer. Difierent dopant concentrations varied from 0,4% to 2% were monitored. It was observed that the electroluminescence increases up to 1%w/v doping ratio. The luminance of OLEDs increased from 15.000cd/m 2 to 24.000cd/m 2 in comparison pristine device with 1% MNP doped device.
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