Add time:08/06/2019 Source:sciencedirect.com
2-Cyclohexenyl-1-phenyl-1H-benzo[d]imidazole (Hcyclopbi) and its heterocyclometalated iridium complexes bis[2-cyclohexenyl-1-phenyl-1H-benzo[d]imidazole](acetylacetonate)iridium(III) [(cyclopbi)2Iracac] and bis[2-cyclohexenyl-1-phenyl-1H-benzo[d]imidazole][2-(3-(trifluoromethyl)-1H-pyrazol-5-yl)pyridinate]iridium(III) [(cyclopbi)2IrCF3] were firstly designed and synthesized. Owing to the strong electron withdrawing ability of 2-(3-(trifluoromethyl)-1H-pyrazol) compared to that of acetylacetonate, blue shifted phosphorescence 542 nm was obtained for (cyclopbi)2IrCF3 compared to that of (cyclopbi)2Iracac 545 nm with photoluminescence quantum yields (φ) 0.22 and 0.25, respectively, as well the highest occupied molecular orbit (HOMO) energy level was estimated to be −5.10 eV for (cyclopbi)2IrCF3, 0.19 eV lower than that of −4.91 eV for (cyclopbi)2Iracac. When (cyclopbi)2Iracac was doped into 4,4′-bis(9H-carbazol-9-yl)biphenyl (CBP) as the emitting layer, high efficiency organic light emitting devices (OLEDs) were obtained with maximum current efficiency (ηc) 22.3 cd/A at 3.1 mA/cm2 and maximum brightness 16,300 cd/m2 at 171.6 mA/cm2, which were comparable to those of bis(2-phenylpyridine)(acetylacetonate)iridium(III) [(ppy)2Iracac] with the same device structure. This results indicate that (cyclopbi)2Iracac and (cyclopbi)2IrCF3 are potential phosphorescent dyes used for OLEDs.
We also recommend Trading Suppliers and Manufacturers of 1-(1-Cyclohexenyl)-1-propanone (cas 1655-03-4). Pls Click Website Link as below: cas 1655-03-4 suppliers
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View