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| Effect of Ancillary Ligand on Photoelectric Properties of Cinnoline Iridium Complexes |
| Author Name | Affiliation | E-mail | | PAN Miao | Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Ministry of Education, Institute of Molecular Engineering and Applied Chemistry, School of Metallurgy Engineering, Anhui University of Technology, Ma'anshan, Anhui 243002, China | | | LI Si-Hua | Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials(FUNSOM) & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China | | | CHENG Mao-Ling | Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Ministry of Education, Institute of Molecular Engineering and Applied Chemistry, School of Metallurgy Engineering, Anhui University of Technology, Ma'anshan, Anhui 243002, China | | | HU Yuan-Yuan | Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Ministry of Education, Institute of Molecular Engineering and Applied Chemistry, School of Metallurgy Engineering, Anhui University of Technology, Ma'anshan, Anhui 243002, China | | | SHI Peng | Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Ministry of Education, Institute of Molecular Engineering and Applied Chemistry, School of Metallurgy Engineering, Anhui University of Technology, Ma'anshan, Anhui 243002, China | | | XU Jing-Yu | Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Ministry of Education, Institute of Molecular Engineering and Applied Chemistry, School of Metallurgy Engineering, Anhui University of Technology, Ma'anshan, Anhui 243002, China | | | TONG Bi-Hai | Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Ministry of Education, Institute of Molecular Engineering and Applied Chemistry, School of Metallurgy Engineering, Anhui University of Technology, Ma'anshan, Anhui 243002, China | tongbihai@163.com | | FUNG Man-Keung | Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials(FUNSOM) & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China | mufung@suda.edu.cn | | ZHANG Qian-Feng | Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Ministry of Education, Institute of Molecular Engineering and Applied Chemistry, School of Metallurgy Engineering, Anhui University of Technology, Ma'anshan, Anhui 243002, China | zhangqf@ahut.edu.cn |
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| Abstract: Two new cyclometalated iridium(Ⅲ) complex (dpci)2Ir(paz) and (dpci)2Ir(taz) (dpci=3,4-diphenylcinnoline, pazH=5-(2-pyridyl)-3-trifuoromethylpyrazole, tazH=5-trifuoromethyl-3-(pyridin-2-yl)-1H-1,2,4-triazole), were succ-essfully synthesized and characterized by NMR spectroscopy and high resolution mass spectrometry. The photo-luminescence spectra of (dpci)2Ir(paz) and (dpci)2Ir(taz) in PMMA (1%, w/w) show emission maximum at 616 and 612 nm, which are blue shifted compared to that of reference complex (dpci)2Ir(pic) (pic=picolinate, 625 nm). The quantum yields of (dpci)2Ir(paz) and (dpci)2Ir(taz) are 51.9% and 32.5%, which are higher than that of (dpci)2Ir(pic) (16.1%). After modification, the thermal stability of complexes are enhanced, and they can be used to prepare organic electroluminescent devices by evaporation method. OLED device using (dpci)2Ir(paz) as dopant exhibited intense saturated red emission with CIE coordinates of (0.66, 0.34). The device has the best performance with a maximum external quantum efficiency of 2.7% and luminance efficiency of 8.5 cd·A-1. The maximum luminance was 2 484 cd·m-2. The device based on I(dpci)2Ir(taz) exhibits the best efficiency. Its maximum external quantum efficiency is 5.5% and the corresponding efficiency is 14.5 cd·A-1. The maximum luminance is 2 931 cd·m-2. |
| Keywords: cyclometalated iridium(Ⅲ) complex phenylcinnoline organic electroluminescence phosphorescence ancillary ligand |
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| PAN Miao,LI Si-Hua,CHENG Mao-Ling,HU Yuan-Yuan,SHI Peng,XU Jing-Yu,TONG Bi-Hai,FUNG Man-Keung,ZHANG Qian-Feng.Effect of Ancillary Ligand on Photoelectric Properties of Cinnoline Iridium Complexes[J].Chinese Journal of Inorganic Chemistry,2018,34(4):627-632. |
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