| 초록 |
A highly efficient and soluble blue emitting cyclometalated heteroleptic iridium(III) complexes (dfbntbupy)2Ir(pic-ET) and (dfbntbupy)2Ir(pic-HT) were designed and successfully synthesized for solution process phosphorescence organic light-emitting diodes (PhOLEDs). The incorporation of electron transport material (ETM) and hole transport material (HTM) in ancillary ligand can enhance the efficiencies of the device. The photophysical, thermal and electrochemical properties of the complexes were systematically investigated by UV-visible, TGA, DSC and cyclic voltammetry. The blue PhOLEDs were fabricated with the configuration of ITO/PEDOT:PSS/pBCb2Cz:mCPPO1:Dopant/TSPO1/LiF/Al. The optimized OLEDs showed maximum luminance efficiency of 28.71 cd/A, maximum power efficiency of 10.01 lm/W and maximum external quantum efficiency of 19.06% at 9.24 V driving voltage. |
