Synthesis and Characterization of New Phosphorescent Heteroleptic Iridium (III) Complex by Using Tetrazole as an Ancillary Ligand for Organic Light-Emitting Diodes |
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| Authors: | Thota Giridhar Woosum Cho Yeong-Soon Gal |
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| Institution: | 1. Department of Chemistry Education, Graduate Department of Chemical Materials, BK 21 PLUS Team for Advanced Chemical Materials, and Institute for Plastic Information and Energy Materials, Pusan National University, Busan, Republic of Korea;2. Department of Chemistry, Dong-A University, Busan, Republic of Korea |
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| Abstract: | The yellow emitting tetrazole based heteroleptic iridium(III) complex, bis(diphenylquinoline)iridium(pyridyltetrazole) (DPQ)2Ir(PyTz)], was synthesized and conformed by 1H-,13C NMR spectral techniques. The purity was also confirmed by HPLC. The thermal, electrochemical, photophysical and electroluminescent properties were intrinsically investigated. The Ir(III) complex is thermally more stable having thermal decomposition temperature (Td, 5% weight loss) more than 350°C and it shows very high glass transition temperature Tg-233°C. We have followed the easy and cost effective solution process for (DPQ)2Ir(PyTz) device fabrication and achieved better performance yellow phosphorescent organic light-emitting diodes (PhOLEDs), maximum external quantum efficiency (EQE) of 5.68%, luminance efficiency 12.63 cd/A, and CIE coordinate of (0.56, 0.43). |
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| Keywords: | Solution process tetrazole yellow PhOLEDs iridium(III) complex |
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