Ultra-bright alternating current organic electroluminescence

We report on an alternating current (AC) field induced organic electroluminescence (EL) device with internal charge carrier generation and recombination luminance of over 5000 cd m−2 under AC drive without charge carrier injection from external electrodes. The ultra-bright AC-EL is attributed to an optical optimization performed on the devices via numerical optical simulations based on an optical thin film model as well as an increase in the number of charge carriers achieved via the concept of molecular doping within the device. The luminance levels achieved are highest reported so far in literature for AC organic light emitting devices.

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► We report an AC field induced organic EL device with recombination luminance.
► We demonstrate AC organic EL of 5000 cd m−2 and luminous efficacy of 1 lm W−1.
► Numerical optical simulations to optimize the device performance.
► Generation of charge carriers within the device via the concept of molecular doping.