Abstract
Organic light-emitting diodes involve several interfaces such as metal/organic, inorganic/organic and organic/organic layers. These interfaces significantly influence the performances, efficiency and lifetime, of the light-emitting diode. In this article, potential barriers for electrons and holes at the interfaces are discussed to control the charge injection and confinement. Insertion of a thin interlayer and doping of a donor or an acceptor into the organic layers at the interfaces reduce the potential barriers.
