Monodisperse conjugated polymer particles are accessible via dispersion polymerization protocols. The particles have diameters in the range of the wavelength of visible light and can be processed via ink-jet printing, during which they self-assemble into photonic crystals. This allows for the generation of printed and optically pumped organic lasers without the need for sophisticated nanofabrication techniques.
Integration of the particles into opto-electronic devices would enable new device architectures; however, the colloids are too large to be applied in current opto-electronic diode architectures. Because of low charge carrier mobility in conjugted polymers such devices would require high voltages and currents, which would deteriorate the light emission quality.
Here we will show the synthesis of monodisperse conjugated polymer particles with incorporated inorganic low work function nanoparticles. When the hybrid inorganic/conjugated polymer particles are integrated into a dielectric matrix, the inorganic nanoparticles can be addressed by an alternating electric field. Here they act as nanoelectrodes allowing for light emission from the conjugated polymer in a light emitting capacitor device.