Polymer LEDs as a physics tool

We present a systematic experimental and theoretical study of physical mech anisms governing the operation of polymer light-emitting diodes. We show th at through self-consistent modeling we can address both charge transport an d exciton generation. Electron and hole mobility in several polymers has be en characterized experimentally. Characterization of excitons and especiall y of triplet-excitons is achieved through use of a triplet-emitting molecul e.