EFFICIENCY ENHANCEMENT OF MICROCAVITY ORGANIC LIGHT-EMITTING-DIODES

We report microcavity efficiency enhancement of organic electrolumines cent devices based on the hole transporter bis(triphenyl) diamine and the electron transporter and Light emitter tris(8-hydroxyquinoline) al uminum. Microcavity organic light emitting diodes are described that e mit four times the light measured in the forward direction (spectrally integrated), or almost twice the total light (spectrally and spatiall y integrated) of a noncavity organic light-emitting diode for identica l electrical drive conditions. (C) 1996 American Institute of Physics.