Abstract
Metal-enhanced fluorescence was realized in the emissive layer of organic electroluminescent devices. Core-shell Au nanoparticles (Au@SiO2) doped into the emissive layer of polymer light-emitting diodes (PLEDs) were used to enhance the luminous efficiency by a factor of 1.6 relative to the undoped reference devices (from 6.3 cd/A to 10.0 cd/A). The silica shell outside the Au nanoparticles was used to ensure that there was sufficient distance between the Au nanoparticles and the fluorescent polymer material to avoid quenching of the excitons. In addition, sufficient overlap of the energy of the localized surface plasmon resonance of the Au nanoparticles and the energy of the excitons formed in the emissive layer was guaranteed. These led to an enhanced PLED efficiency. This research provides a way to obtain high performance organic electroluminescent devices.
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