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Web of Proceedings - Francis Academic Press
Web of Proceedings - Francis Academic Press

Fast Synthesis of the Iridium (Iii) Complexes At Room Temperature for High-Performance Oleds

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DOI: 10.25236/iccemm.2021.008


Zhiwei Zhang, Youxuan Zheng

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Zhiwei Zhang


Organic light-emitting devices (OLEDs) have attracted much attention due to their advantages of low driving voltage, high brightness and high efficiency. They have broad application prospects in solid-state lighting and flat panel display. Among the emitters used in OLEDs, the Iridium(III) complexes have been widely applied due to their tunable emission energy, excellent chemical stability and high photoluminescent efficiency. But for the preparation of most Ir(III) complexes, the last reaction process is always kept at high temperature for a long time, which would inevitably increase the manpower and cost. Therefore, it is important to find suitable ligands which can form phosphorescent complexes at room temperature efficiently. In this paper, a sulfur atom containing ligand of N,N-diisopropyl dithiocarbamate was prepared and used as an ancillary ligand for red and green Ir(III) complexes with 4-(4-(trifluoromethyl)phenyl)quinazoline and 2-[4-(trifluoromethyl)phenyl]pyridine as the cyclometalated ligands, respectively. Both complexes were synthesized at room temperature in few minutes and also show good device performances. Respectively, the red OLED shows a maximum luminance above 26000 cd m-2 and an EQEmax of 15.30%. and the green device displays a Lmax above 33466 cd m-2 with an EQEmax of 25.17%. These results suggest that the sulfur containing Ir(III) complexes have potential application in OLEDs with reduced cost


Organic light-emitting diodes; High-efficiency; Fast room-temperature synthesis; Iridium complexes; Red and green ligh