Efficient all-solution-processing deep-red polymer light-emitting diodes (PLEDs) based on [Ir(dpqx)2(N^O)]-heteroleptic complexes with asymmetric N^O-ancillary π-donors
| Autor: | Baowen Wang, Guorui Fu, Siyu Hou, Tiezheng Miao, Weixu Feng, Wentao Li, Xingqiang Lü, Jiaxiang Liu |
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| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Materials science Ligand Biophysics 02 engineering and technology General Chemistry Polymer Electroluminescence 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Biochemistry Polymer light emitting diodes Atomic and Molecular Physics and Optics 0104 chemical sciences chemistry OLED Physical chemistry 0210 nano-technology Phosphorescence |
| Zdroj: | Journal of Luminescence. 232:117843 |
| ISSN: | 0022-2313 |
| DOI: | 10.1016/j.jlumin.2020.117843 |
| Popis: | Despite concerted efforts to cyclometalated Ir(III)-complexes towards reliable vacuum-deposited/solution-processed deep-red organic/polymer light-emitting diodes (OLEDs/PLEDs), the realization of their all-solution-processed ones with desirable lower-cost, is challenging and rarely reported. In this work, using the Hdpqx (2,3-diphenylquinoxaline) as the C^N main ligand and the asymmetric π-donor HL1/HL2 (HL1 = (2-(4,5-diphenyl-1H-imidazol-2-yl)phenol); HL2 = 2-(1,4,5-triphenyl-1H-imidazol-2-yl)phenol)) as the N^OH ancillary ligand, two C1-[Ir(C^N)2(N^O)]-heteroleptic Ir(III)-complexes [Ir(dpqx)2(L1)] (1) and [Ir(dpqx)2(L2)] (2) with efficient deep-red phosphorescence (λem = 662–665 nm and ΦPL = 0.34–0.42) were molecularly designed. Meanwhile, based on the all-solution-processed fabrication, their reliable all-solution-processed deep-red PLEDs with the attractive electroluminescent performance (ηcMax = 0.51–0.58 cd/A, ηpMax = of 0.11–0.13 lm/W and ηEQEMax = 2.08–2.16%; weak (ca. 26–27%) efficiency-roll-offs) were realized. |
| Databáze: | OpenAIRE |
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