905948-30-3Relevant academic research and scientific papers
Bipolar fluorophores based on intramolecular charge-transfer moieties of sulfone for nondoped deep blue solution-processed organic light-emitting diodes
Cao, Liang,Zhang, Lei,Wei, Qiang,Zhang, Jiasen,Chen, Dongjun,Wang, Sheng,Su, Shi-jian,Wang, Tao,Ge, Ziyi
, (2020)
Dipolar emitters exhibited excellent performance in organic light-emitting diode (OLED). However, these molecules had intramolecular charge-transfer (ICT) properties, which posed challenge to obtain deep blue emission. In this study, three fluorophores were designed by introducing carbazole and diphenylamine as electron donors and sulfone as electron acceptor due to their mild charge-accepting properties and twisted angles. These materials appeared almost in vertical angles of the dihedral configuration, and exhibited high thermal and electrochemical stability, suitable for solution-processed OLED. The solution-processed non-doped devices based on these three emitters were realized, where two emissions within the standard deep blue emission range were achieved with the Commission International e de l'Eclairage (CIE) coordinates of (0.16, 0.12) and (0.16, 0.15).
Symmetrical sulfur-containing wet processing type blue organic electroluminescent material as well as preparation method and application thereof
-
Paragraph 0052; 0067; 0072; 0073, (2019/10/01)
The invention provides a series of sulfone-containing symmetrical wet process type blue organic electroluminescent materials, which contain sulfones, substituted carbazoles, fluorenes, triphenylamines and derivatives thereof. By a symmetrical design, the electron transmission balance is adjusted; the solubility of molecules is increased by increasing a branched chain of an alkyl chain, wet processing is facilitated and the production cost is reduced. The series of electroluminescent materials relate to the field of electroluminescence, can emit blue and dark blue fluorescence, and can be applied to the fields of OLED (Organic Light Emitting Diode) lighting and OLED display. The material has a strong electron acceptor and a weaker electron donor, a large conjugated structure and a twisted and partially rigid planar structure, the intermolecular force is suppressed, the stability of a device is improved, and high level fluorescence quantum efficiency and blue light material are obtained.
