We report microcavity efficiency enhancement of organic electroluminescent devices based on the hole transporter bis(triphenyl) diamine and the electron transporter and light emitter tris(8-hydroxyquinoline) aluminum. Microcavity organic light emitting diodes are described that emit four times the light measured in the forward direction (spectrally integrated), or almost twice the total light (spectrally and spatially integrated) of a noncavity organic light-emitting diode for identical electrical drive conditions.
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Jordan et al. (1996) studied this question.