Ppreparati̇on and characteri̇zati̇ons of whi̇te oleds based on organometalli̇c complexes

This work comprises different solution process approaches for obtaining large area white organic light emitting diodes (WOLED). Spin coating and doctor blade were used for the fabrication of large area WOLEDs. In addition, newly synthesized two ruthenium and three iridium complexes were used to investigate their potential for the WOLEDs. Generation of white light is realized by using one of the triplet harvesting method (phosphorescent/fluorescent (F/P) approach). Hence, white light was obtained from the residual blue phosphorescence of the sensitizer, the sensitized orange-red fluorescence is due to triplet-to-singlet energy transfer, and the instantaneous fluorescence results from singlet–singlet transfer. Two ruthenium complexes labeled as CS91 and CS93, and three iridium complexes labeled as CS137, CS138 and CS139 were used as an orange-red emitter and yellow in an OLED for investigation of their potentials as an emitter material for WOLEDs. Finally, the highly efficient WOLED were used for enlarge the active area by using spin coating and doctor blade techniques. WOLED panel (63mm x 100) with active area of 30mm x 70mm were obtained by using doctor blade.