Organic electroluminescent material and device thereof

A compound having a structure represented by Formula 1:

• wherein the ring Cy1, the ring Cy2, the ring Cy3, the ring Cy5, and the ring Cy6 are, at each occurrence identically or differently, selected from an unsaturated carbocyclic ring having 5 to 30 carbon atoms or an unsaturated heterocyclic ring having 3 to 30 carbon atoms;
• and the ring Cy4 is selected from an unsaturated carbocyclic ring having 5 to 30 carbon atoms or an unsaturated heterocyclic ring having 4 to 30 carbon atoms;
• Z1, Z2, and Z3 are, at each occurrence identically or differently, selected from B, N, P, P═O, P═S, As, As═O, As═S, SiR, or GeR;
• L1, L2, L3, and L4 are, at each occurrence identically or differently, selected from a single bond, O, S, Se, NR′, PR′, P═OR′, P═SR′, AsR′, As═OR′, As═SR′, CR′R′, SiR′R′, or GeR′R′;
• when multiple R′ are present at the same time, the multiple R′ are identical or different;
• a, b, c, and d are each independently selected from 0, 1, or 2;
• T1 to T8 are, at each occurrence identically or differently, selected from C, CRt, CRtRt, N, NRt, O, S, or Se;
• R1, R2, R3, R4, R5, and R6 represent, at each occurrence identically or differently, mono-substitution, multiple substitutions, or non-substitution;
• R, R′, Rt, R1, R2, R3, R4, R5, and R6 are, at each occurrence identically or differently, selected from the group consisting of:
• hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
• adjacent substituents R5 can be optionally joined to form a ring;
• and
• adjacent substituents R′, Rt, R1, R2, R3, R4, and R6 can be optionally joined to form a ring.