The invention discloses a thermal activation delayed
fluorescence material capable of being processed by a solution, a preparation method and application thereof. The thermal activation delayed
fluorescence material capable of being processed by a solution comprises a molecular structure, the molecular structure is composed of two parts, one part is a core with a thermal activation delayed
fluorescence property, the other part is a structure with a high
triplet state energy level, at most one of R1 and R2 is
hydrogen, the other parts are all connected with
oxygen through
benzene rings, and
oxygen connection has a structure with a high
triplet state energy level. The novel material has great advantages, the
concentration quenching of triplet excitons can be effectively reduced through the steric hindrance effect of
peripheral branched chains, and the performance of a light-emitting device is improved; the introduction of
benzene rings can effectively enhance the
solubility and film-forming property of the material. The thermal activation delayed fluorescence material capable of being processed by the solution has a relatively
large molecular weight and good film-forming property, and is suitable for preparing an organic light-emitting device by a wet method. And along with the increase of the
peripheral branched chains, the performance of the device is greatly improved.