Organic light-emitting material based on a platinum tetradentate oncn complex, preparation method and application thereof in organic light-emitting diodes

A platinum (II) tetradentate ONCN complex light-emitting material having a chemical structure of Formula I,

• wherein R1-R15 are independently a hydrogen atom, a halogen, a hydroxyl group, an unsubstituted alkyl group, a halogenated alkyl group, a deuterated alkyl group, a cycloalkyl group, an unsubstituted aryl group, a substituted aryl group, an acyl group, an alkoxyl group, an acyloxyl group, an amino group, a nitro group, an acylamino group, an aralkyl group, a cyano group, a carboxyl group, a sulfonyl group, a styryl group, an amino carboxyl group , a carbamoyl group, an aryloxy carboxyl group, a phenoxy carboxyl or epoxy carboxyl group, a carbazole group or a diphenylamine group, and R1-R15 independently form a 5-8 membered ring with adjacent groups, and are not hydrogen at the same time;
• B presents an anti-aggregation group, wherein R16-R24 are independently a hydrogen atom, a halogen, an unsubstituted alkyl group, a halogenated alkyl group, a deuterated alkyl group, a cycloalkyl group, an unsubstituted aryl group, a substituted aryl group, a cyano group, a carbazole group, or a diphenylamine group, and n is 0 or 1.