Hydrogen-bonded supramolecular conjugated polymer nanoparticles for white light-emitting devices

Supramolecular polyfluorenol enable assembly into conjugated polymer nanoparticles (CPNs). Poly{9-[4-(octyloxy)phenyl]fluoren-9-ol-2,7-diyl} (PPFOH)-based supramolecular nanoparticles are prepared via reprecipitation. PPFOH nanoparticles with diameters ranging from 40 to 200 nm are obtained by adding different amounts of water into DMF solution. Size-dependent luminescence is observed in PPFOH-based hydrogen-bonded nanoparticles that is different from that of poly(9,9-dioctylfluorenes). Finally, white light-emitting devices using CPNs with a size of 80 nm exhibit white emission with the CIE coordinates (0.31, 0.34). Amphiphilic conjugated polymer nanoparticles are potential organic nano-inks for the fabrication of organic devices in printed electronics. Polyfluorenol-based supramolecular conjugated polymer nanoparticles are size-controllable in the range of 200-40 nm and emit from sky blue to yellow-green owing to self-doping aggregates. As a result, devices based on poly{9-[4-(octyloxy)phenyl]fluoren-9-ol-2,7-diyl}-nanoparticles exhibit white emission with CIE coordinates of (0.31, 0.34).