The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Bis[2-(1-isoquinolinyl-N)phenyl-C](2,4-pentanedionato-O2,O4)iridium(III)( cas:435294-03-4 ) is researched.Recommanded Product: 435294-03-4.Hu, Shimin; Zeng, Jiajie; Zhu, Xiangyu; Guo, Jingjing; Chen, Shuming; Zhao, Zujin; Tang, Ben Zhong published the article 《Universal Bipolar Host Materials for Blue, Green, and Red Phosphorescent OLEDs with Excellent Efficiencies and Small-Efficiency Roll-Off》 about this compound( cas:435294-03-4 ) in ACS Applied Materials & Interfaces. Keywords: phosphorescent organic LED blue green red universal bipolar host; aggregation-induced emission; bipolar host; carrier transport; energy transfer; phosphorescent OLEDs. Let’s learn more about this compound (cas:435294-03-4).
Host materials are indispensable for the fabrication of organic light-emitting diodes (OLEDs) with phosphorescent emitters, but high-quality host materials that can efficiently and simultaneously function in blue, green, and red phosphorescent OLEDs (PHOLEDs) are much rare. Four bipolar materials are developed using carbazole and 9,9-dimethyl-9,10-dihydroacridine as hole-transporting groups, pyridine as electron-transporting groups, and biphenyl and m-methylbiphenyl as π-spacers. The crystal and electronic structures indicate that these materials have highly twisted conformations, which endow them with aggregation-induced emission features, intramol. charge transfer processes, wide energy band gaps, and high triplet energies. The carrier transport ability and energy transfer property analyses show that these materials are able to achieve balanced hole and electron transports and can serve as bipolar host materials for PHOLEDs. Monochromatic PHOLEDs with different phosphorescent dopants, including blue-emissive FIrpic, green-emissive Ir(ppy)2(acac), and red-emissive Ir(piq)2(acac), are fabricated by employing these 4 host materials. The green PHOLEDs can provide an impressive luminance of up to 230,200 cd m-2. Based on an identical host material, excellent external quantum efficiencies ≤25.12, 24.73, and 19.71%, as well as minor efficiency roll-off, are attained for blue, green, and red PHOLEDs, resp., clearly demonstrating the promising applications as universal bipolar host materials in PHOLEDs with monochromatic light and white light.
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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica