Enhanced Electroluminescence of Poly(2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylene vinylene) Films in the Presence of TiO2 Nanocrystals

Abstract

We demonstrated that in a nanocrystalline TiO 2 /poly(2-methoxy-5-(2 0 -ethylhexyloxy)-1,4-phenylene vinylene) (MEH-PPV) composite, electroluminescence of this composite is enhanced via addition of TiO 2 nanoneedles. The TiO 2 nanoneedles enhance the partial crystallization of MEH-PPV around TiO 2 , which in turn causes a decrease in the hole barrier height and an increase in hole mobility. The IYV measurement was established on an indium tin oxide/MEH-PPV:TiO 2 /Al device to identify the electrical properties of the composites.