| abstract |
The invention discloses a compound using a phenanthridine derivative as an acceptor and its application in an organic electroluminescence device, belonging to the technical field of organic electroluminescence materials. The general structural formula of such compounds is shown in formula (I) or formula (II), and Donor is an electron donating group. The compound using the phenanthridine derivative as the acceptor provided by the present invention has a donor-acceptor structure, a small Ξ”Est energy value, and a suitable HOMO/LUMO value, and can realize high brightness, low voltage and high efficiency of organic EL elements. and long service life, at the same time, the material made of the compound of the present invention has high thermal stability, can significantly improve the luminescence stability of the light-emitting device, and can be widely used in OLED light-emitting devices and display devices as the host material of the light-emitting layer or Thermally active delayed fluorescence light-emitting materials are used. |