| abstract |
The invention discloses a thermally excited delayed fluorescent material capable of improving luminous efficiency and stability, polymers, mixtures, compositions and organic electronic devices containing the same. The thermally excited delayed fluorescent material contains at least two aromatic rings or Heteroaromatic ring conjugation units facilitate the realization of thermally excited delayed fluorescence (TADF) properties. This thermally excited delayed fluorescent material can be used as a TADF luminescent material. By cooperating with a suitable host material, the luminous efficiency and stability of an electroluminescent device containing this thermally excited delayed fluorescent material can be improved, thereby providing a low-cost manufacturing method. Solutions for low-efficiency, high-efficiency, long-life, and low-roll-off light-emitting devices. |