ABSTRACT
Due to their application in electroluminescent devices, conjugated polymers have been the subject of intense research over the decade. A typical polymer light-emitting diode (PLED) consists of a thin layer of undoped conjugated polymer, such as poly(phenylenevinylene) (PPV), sandwiched between two electrodes on top of a glass substrate. As the anode a patterned indium-tinoxide (ITO) bottom electrode is used, whereas the cathode on top of the polymer consists of an evaporated Ca electrode, as indicated in Figure 1. Under forward bias electrons and holes are injected into the polymer from the cathode and anode, respectively.
