Outcoupling efficiency of organic light emitting diodes employing graphene as the anode

► Theoretical analysis of outcoupling efficiency (OCEs) of OLEDs with graphene anode. ► OCEs of OLEDs with graphene anode are compared with the OLEDs with ITO anode. ► Composite electrode is effective to increase OCEs of OLEDs and decrease sheet resistance. ► The light extraction techniques are expected to be much effective in graphene based OLEDs.