A dye functionalized silver–silica core–shell nanoparticle organic light emitting diode

A rhodamine dye functionalized silver–silica core–shell nanostructure was synthesized and applied into an organic light emitting device (OLED). Electroluminescence (EL) of the diode surprisingly exhibits much broader spectrum than its photoluminescence (PL), which breaks a new path for white light OLED material design and optimization. In addition, silver nanoparticles (NPs) surface plasmon renders much stable luminescence to the rhodamine dye by favoring its radiative decay channel. It makes hybrid NPs a good light source which might have potential application in single photon emitting devices. To our knowledge, this is the first report on a rhodamine based OLED.

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► Rhodamine dye functionalized silver–silica core–shell nanoparticles were synthesized.
► They were used into an organic light emitting device (OLED).
► Much stable luminescence from the rhodamine results from coupling to the metal nanoparticles.