The invention provides a compound with a structure as shown in formula I. The invention also provides an application of the compound in an organic photoelectric device and the organic photoelectric device. The compound provided by the invention has a thermal activation delayed fluorescence (TADF) material luminous mechanism, can be used as a novel TADF material applied to the field of the organic photoelectric device and can increase the illuminating efficiency. No expensive metal complex is used by the compound provided by the invention; the manufacturing cost is low; the application prospect is wider.