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Optical characteristics of organic light emitting diode with IrQ(ppy)2-5Cl and its emitter |
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| Authors: | Taiju Tsuboi Silviu Polosan Duo-Fong Huang |
| Affiliation: | a Faculty of Engineering, Kyoto Sangyo University, Kamigamo, Kita-ku, Kyoto 603-8555, Japan b National Institute for Materials Physics, Bucharest-Magurele 077125, Romania c Institute of Chemistry, Academia Sinica, 115 Taipei, Taiwan |
| Abstract: | The synthesis and photophysical study of a cyclometalated mixed-ligand iridium(III) complex are reported. The iridium complex (called IrQ(ppy)2-5Cl) has two cyclometalated 2-phenylpyridine (ppy) ligands and one 8-hydroxyquinoline (Q) ligand, where one of the H atom is substituted by Cl atom. Absorption and photoluminescence spectra are studied for the neat film and films of IrQ(ppy)2-5Cl doped in 4,4′-N,N′-dicarbazole-biphenyl and polystyrene, together with the electroluminescence spectra using multi-layer light emitting devices. The electronic states are studied using density functional theory calculations. Emission bands are observed at 502 and 666 nm, which arise from ppy and Q ligands, respectively. |
| Keywords: | Organic light emitting diode Mixed-ligand Ir-complex Photoluminescence DFT calculations Phosphorescence |
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