Benzo[c]phenanthrene derivative with electron donor-acceptor structure and application thereof and electroluminescent device

Abstract

The invention belongs to the field of photoelectric material application science and technology, and particularly relates to a benzo[c]phenanthrene derivative with an electron donor-acceptor structure and application thereof and an electroluminescent device. The derivative takes benzo[c]phenanthrene as a core, and by linking different aromatic amine groups to different sites of the benzo[c]phenanthrene in a key mode or changing a bridged structure, an efficient fluorescence material with the double polarity is formed. The material has the advantages that the stability and conjugacy of large aromatic rings of the benzophenanthrene are utilized, distribution of electron clouds on the molecules is adjusted through the periphery groups, and therefore luminescent property can be effectively adjusted.

Description

technical field [0001] The invention belongs to the field of photoelectric material application technology, and specifically relates to derivatives of benzo[c]phenanthrenes with an electron donor-acceptor structure, their application and electroluminescent devices. Background technique [0002] The 21st century is an era of knowledge economy with the information industry as the core, and its notable features are the digitization and networking of information and the construction of information superhighways. Since 1987, American Kodak Company (PopeM., Kallmann.H.P., Magnante.P., Electroluminescence in Organic Crystals. The Journal of Chemical Physics 1963, 38 (8): 2042-2043) and Cambridge University in 1990 respectively launched organic and polymer electroluminescence materials and devices. Since then, international competition for "modern flat panel display technology" has been aroused worldwide in the fields of material science and information technology. [0003] OLED fu...

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Problems solved by technology

[0004] At present, more blue-light dopants such as perylene derivatives TBP (J.Shi, C.W.Tang, Anthracene Derivatives for Stable Blue-Emitting Organic Electroluminescence Devices. Applied Physics Letters 2002, 80 (17): 3201-3203.), but because the perylene ring is hard and planar, it is easy to lead to concentration quenching, the doping concentration is very low

Diarylamine styrene derivatives DSA-Ph (M.-T.Lee, H.-H.Chen, C.-H.Liao, et al., StableStyrylamine-DopedBlueOrganicElectroluminescentDeviceBasedon2-Methyl-9,10-Di(2- Naphthyl)Anthracene.AppliedPhysicsLetters2004,85(15):3301-3303), the efficiency of the doped device reaches 9.7cd / A, but the light color is only sky blue CIE(0.16,0.32)

But the light color is difficult to reach the deep blue light area

Therefore, blue-light fluorescent materials are still a bottleneck in the development of organic light-emitting diodes. Traditional fluorescent light-emitting materials have a problem of carrier imbalance, which leads to low device efficiency. Generally, strong electron-absorbing and pulling groups will lead to HOMO and LUMO. The energy level changes, resulting in high injection barrier, high turn-on voltage, and low efficiency

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