1294411-24-7Relevant academic research and scientific papers
Efficient bipolar AIE emitters for high-performance nondoped OLEDs
Bai, Yongqi,Cao, Liang,Ge, Ziyi,Wang, Tao,Wei, Qiang,Zhang, Jiasen
, p. 11771 - 11777 (2020)
Three luminogens were designed and synthesized by integratingTPEwith hole-transporting carbazole (Cz) and/or electron-transporting 1,2-diphenyl-1H-benzimidazole (PBi), and bare tetraphenylethene and another donor-acceptor (D-A) compound with aggregation-caused quenching (ACQ) were also prepared for comparison. In nondoped OLEDs, the best one with both aggregation-induced emission (AIE) properties and donor-acceptor (D-A) structures showed excellent performances withLmax, CEmax, PEmax, and EQEmaxof 24 308 cd m?2, and 15.10 cd A?1, 14.82 lm W?1, and 5.34%, respectively, which reached the theoretical limit of fluorescent OLEDs.
An electronic transmission material, preparation method and its application
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, (2016/11/28)
The invention relates to an electron transport material, and a preparation method and application thereof. The electron transport material uses aryl group as the center, wherein one side is connected with a naphthyridine group with electron transport property, and the other side is connected with a group different from naphthyridine with electron transport property, thereby constituting an unsymmetrical structure. The two sides of the aryl group are connected with different groups, thereby destroying the molecular symmetry, further destroying the molecular crystallinity and avoiding the intermolecular aggregation; and thus, the electron transport material has favorable film-forming property. Most groups in the molecule are rigid groups, thereby enhancing the heat stability of the material. Meanwhile, the aryl group is connected with the groups with electron transport property, so that the material has favorable electron transport capacity and hole barrier capacity, and can be used as an electron transport layer for organic electroluminescent devices.
Carbazole-benzimidazole hybrid bipolar host materials for highly efficient green and blue phosphorescent OLEDs
Chen, You-Ming,Hung, Wen-Yi,You, Hong-Wei,Chaskar, Atul,Ting, Hao-Chun,Chen, Hsiao-Fan,Wong, Ken-Tsung,Liu, Yi-Hung
supporting information; experimental part, p. 14971 - 14978 (2012/02/03)
In this study, we synthesized a series of bipolar hosts (CbzCBI, mCPCBI, CbzNBI, and mCPNBI) containing hole-transporting carbazole and electron-transporting benzimidazole moieties and then examined the morphological, thermal, and photophysical properties
New bipolar green host materials containing benzimidazole-carbazole moiety in phosphorescent OLEDs
Park, Jung Hwan,Kim, Eun Kyung,El-Deeb, Ibrahim M.,Jung, Su Jin,Choi, Dae Hyuk,Kim, Dong-Ha,Yoo, Kyung Ho,Kwon, Jang Hyuk,Lee, So Ha
, p. 841 - 846 (2012/01/13)
New green host materials, 9-phenyl-3-(4-(1-phenyl-1H-benzo[d] imidazol-2-yl)phenyl)-9H-carbazole (3a) and 9-(naphthyl-2-yl)-3-(4-(1-phenyl-1H- benzo[d]imidazol-2-yl)phenyl)-9H-carbazole (3b), have been designed and synthesized by attaching the electron transporting benzimidazole moiety to the hole transporting carbazole unit. These compounds have similar HOMO, LUMO levels and band-gap characteristics compared with CBP (4,4'-di(N-carbazolyl)biphenyl). The fabricated green phosphorescent OLED with this 3a host shows much better device performances compared to CBP-based one. The current and power efficiency is enhanced at least by 60 percent at a given constant luminance of 1000 cd/m2. Copyright
