The facile synthesis of homoleptic phenylpyridazine iridium(III) complexes and their application in high efficiency OLEDs
| Autor: | Cheng-Gui Hu, Li-Ding Wang, Yue-Yue Zhou, Bihai Tong, Lianshe Fu, Man Chen, Qian-Feng Zhang, Yue Wang, Zuqiang Bian, Ping Wang |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Dopant Substituent chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials Biomaterials chemistry.chemical_compound chemistry Materials Chemistry OLED Physical chemistry Density functional theory Quantum efficiency Iridium Electrical and Electronic Engineering Homoleptic 0210 nano-technology Diode |
| Zdroj: | Organic Electronics. 75:105439 |
| ISSN: | 1566-1199 |
| DOI: | 10.1016/j.orgel.2019.105439 |
| Popis: | Two one-pot methods have been used to synthesize various homoleptic phenylpyridazine iridium (III) complexes (2–4). The coordination arrangements of 2 and 3 were revealed by carrying out single X-ray structural analyses. These complexes showed green emission. Their peak wavelengths ranged from 508 to 538 nm with quantum yields greater than 70%. Density functional theory (DFT) was used to discuss the correlation between substituent nature and photophysical characteristics of these complexes. Organic light-emitting diodes (OLEDs) were fabricated by taking 2–4 as dopants. The green device based on complex 4 shows a maximum current efficiency and external quantum efficiency of 78.6 cd A−1 and 21.9%, respectively, and mild efficiency roll-off. The results suggest that these homoleptic phenylpyridazine iridium(III) complexes have potential application as efficient emitters in OLEDs. |
| Databáze: | OpenAIRE |
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