Voltage-tunable-color triple-layer organic light emitting diodes

Abstract

Two kinds of voltage-tunable-color triple layer organic light emitting diodes consisted of styryltriphenyamine SA and 8- hydroxyquinoline aluminum chalet Alq3 or laser dye DCM doped Alq3 as emission layers and oxadizole PBD as carrier confinement layer have been fabricated. They emit both from SA and Alq3 or DCM doped Alq3 and their emission color dependent on the applied voltage. The ratios of blue from SA and green or orange-red from Alq3 or Alq3:DCM increased with the increasing of applied voltage. Brightness current characteristic has been invest9iEnergy models have been assumed and the EL behaviors are explained.