Organic electroluminescent material and device thereof

A compound having a structure of Formula 1:

• wherein in Formula 1,
• the metal M is selected from a metal with a relative atomic mass greater than 40;
• the ring A, the ring B and the ring E are, at each occurrence identically or differently, selected from an unsaturated carbocyclic ring having 5 to 30 carbon atoms, an unsaturated heterocyclic ring having 3 to 30 carbon atoms or a combination thereof;
• and the ring D is selected from an unsaturated heterocyclic ring having 3 to 30 carbon atoms;
• L1 and L2 are, at each occurrence identically or differently, selected from a single bond, O, S, Se, (CR′R′)y, (SiR′R′)y, PR′, NR′, substituted or unsubstituted arylene having 6 to 30 carbon atoms, substituted or unsubstituted heteroarylene having 3 to 30 carbon atoms or a combination thereof;
• y is, at each occurrence identically or differently, selected from 0, 1, 2, 3, 4 or 5;
• and when a plurality of R′ are present at the same time, the plurality of R′ are identical or different;
• K1 to K4 are, at each occurrence identically or differently, selected from a single bond, O or S;
• and
• Z1 to Z3 are, at each occurrence identically or differently, selected from C or N;
• the substituent R in Formula 1 has a structure represented by Formula 2:
• wherein in Formula 2,
• “#” represents a position where Formula 2 is joined;
• the ring F and the ring N are, at each occurrence identically or differently, selected from an aromatic ring having 6 to 30 carbon atoms, a heteroaromatic ring having 3 to 30 carbon atoms or a combination thereof;
• there are two ring atoms that are directly bonded in the ring F, and they are carbon atoms and are connected to two “*”, respectively;
• Z is selected from NRz, O, S or Se;
• F1 and F2 are each independently selected from CRf1, CRF or N, at least one of F1 and F2 is selected from CRf1, and the Rf1 is identically or differently selected from the group consisting of:
• substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms and combinations thereof;
• Ra, Rb, Rd, Re, Rf and Rn represent, at each occurrence identically or differently, mono-substitution, multiple substitutions or non-substitution;
• R′, Ra, Rb, Rd, Re, Rf, RF, Rn and Rz 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 heterocyclyl 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;
• and
• adjacent substituents R′, Ra, Rb, Rd, Re, Rf, RF, Rf1, Rn and Rz can be optionally joined to form a ring.