1391997-01-5Relevant academic research and scientific papers
Synthesis, characterization, physical properties, and blue electroluminescent device applications of phenanthroimidazole derivatives containing anthracene or pyrene moiety
Zhuang, Shaoqing,Shangguan, Ronggang,Huang, Hong,Tu, Guoli,Wang, Lei,Zhu, Xunjin
, p. 93 - 102 (2014)
By introducing a highly fluorescent anthracene, 9-(naphthalen-2-yl) anthracene or pyrene unit at the N1-phenyl of 1,2-diphenyl-1H-phenanthro[9,10-d] imidazole, three novel blue-emissive materials (ANPI, 2-NaNPI and PNPI) were synthesized and characterized, of which HOMO and LUMO orbitals are specifically segregative. Their high luminescence efficiency and excellent stability render them promising materials in electroluminescent device. The undoped three layers device using PNPI exhibits a maximum current efficiency of 4.99 cd A -1 with Commission Internationale d'Eclairage (CIEx,y) color coordinates of (x = 0.15, y = 0.17). Meanwhile, the property differences between N1-substituted and C2-substituted of diphenyl-1H-phenanthro[9,10-d] imidazole derivatives were studied. The results indicate that the change of conjugated position and moiety for those blue hosts can affect the electrical field polarization of device. Specifically, all the blue host materials containing anthracene moiety show an impressive luminous current efficiency around 12 cd A-1 when doped with sky blue fluorescent material BUBD-1.
Phenantrho imidazole derivatives and their use as electroluminescent materials
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Paragraph 0044-0045, (2018/02/04)
The invention relates to design and synthesis of an organic electroluminescent blue-light material with phenanthroimidazole and anthracene as the central unit structure and application of the material in a blue organic light-emitting diode (OLED). The material takes phenanthroimidazole as the core. Groups with different electronic properties are bonded at positions C1 and N2, and the glass transition temperature is raised so as to effectively solve carrier injection and realize high efficiency exciton recombination radically, thus further realizing combination of high efficiency light-emitting and energy level adjustment of the material. In addition, polarity of the compound can be adjusted through pushing/pulling an electron group. Compared with the blue fluorescence of common blue fluorescent main material 2-methyl-9, 10-di(naphth-2-yl)anthracene (M-ADN), the OLED has substantial effects in reduction of operating voltage and efficiency enhancement, so that the material provided in the invention can be widely applied in the field of organic electroluminescence.
