Improved performance of polymer light-emitting diodes with nanocomposites of Au-capped Titanium oxide

The characteristics of a hybrid polymer light-emitting diode HPLED with an active layer of poly 2-methoxy,5-2-ethylhexoxy-1,4-phenylenevinylene blended with Au-capped TiO2 nanocomposites are reported. Both the increased current in the active layer and low turn-on voltage were attributed to incorporation of Au-capped TiO2 in the electroluminescent polymer. The maximal brightness of 11 630 cd/m2 was observed in HPLED with a 1:1 ratio of Au-capped TiO2. The enhanced performance was attributed to the roughness assisted charge transport induced by the Au-capped TiO2 nanocomposites in the active polymer.