Rapid Energy Transfer and Improved Performance of Organic Light-Emitting Diodes Using Composite Film Based on π-Conjugated Polymers

Abstract

The optical and electrical properties of polymer composite films based on poly(2-methoxy-5-dodecyloxy-p-phenylenevinylene) (MDDOPPV) and poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been studied. We investigated the time-resolved photoluminescence of the composite films and clarified the rapid intermolecular energy transfer from F8BT to MDDOPPV. As a result of the utilization of the polymer composite thin film as the emission layer of a light-emitting diode, a 23-fold increase in luminance was observed in comparison to that with a non composite MDDOPPV emission layer.