Synthesis and luminescence of a new phosphorescent iridium(III) pyrazine complex |
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| Affiliation: | 1. State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, 100871 Beijing, P R China;2. Department of Polymer Science and Engineering, College of Chemistry and Molecular Engineering Peking University, 100871 Beijing, P R China;1. College of Electrical and Information Engineering, Shaanxi University of Science and Technology, Xi’an, Shaanxi 710021, PR China;2. Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huai׳an 223003, PR China;1. School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan, Anhui 243002, China;2. Jiangsu Key Lab of Organic Electronics & Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210046, China;1. Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China;2. School of Chemistry & Environment, South China Normal University, Guangzhou 510006, China |
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| Abstract: | The synthesis and luminescent study of a new iridium pyrazine complex are reported. The iridium complex Ir(MDPP)2(acac)] (MDPP=5-methyl-2,3-diphenylpyrazine, acac=acetylacetone) shows strong 1MLCT (singlet metal-to-ligand charge-transfer) and 3MLCT (triplet metal to ligand charge-transfer) absorption at 386 and 507 nm, respectively. Organic light emitting device (OLED) with a configuration of ITO / NPB (30 nm) / NPB: 7% (wt.) Ir(MDPP)2(acac) (25 nm) / BCP (10 nm) / Alq3(30 nm) / Mg : Ag (mass ratio 10 : 1)120 nm / Ag(10 nm) exhibits an external quantum efficiency of 6.02% (power efficiency 9.89 lm W− 1 ) and a maximum brightness of 78,924 cd m− 2. The device also shows high color purity with a maximum peak at 576 nm without any shoulder. |
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