Light-emitting material with a polycyclic ligand

A metal complex, having a general formula of M(La)m(Lb)n(Lc)q;

• wherein the metal M is selected from metals having a relative atomic mass greater than 40, La, Lb and Lc are a first ligand, a second ligand and a third ligand coordinated to the metal M, respectively;
• m is selected from 1, 2 or 3, n is selected from 0, 1 or 2, q is selected from 0, 1 or 2, and m+n+q is equal to an oxidation state of the metal M;
• when m is equal to 2 or 3, a plurality of La can be identical or different;
• when n is equal to 2, two Lb can be identical or different;
• and when q is equal to 2, two Lc can be identical or different;
• and La has a structure represented by Formula 1:
• wherein,
• Z1 and Z2 are each independently selected from C or N, and Z1 and Z2 are different;
• W is, at each occurrence identically or differently, selected from B, N or P;
• ring A, and ring C are, at each occurrence identically or differently, selected from a five-membered unsaturated carbocyclic ring, an aromatic ring having 6 to 30 carbon atoms or a heteroaromatic ring having 3 to 30 carbon atoms;
• ring D is selected from a benzene ring, a naphthalene ring, an aza-naphthalene ring, a pyridine ring or a pyrimidine ring;
• ring B is selected from a heterocyclic ring having 2 to 30 carbon atoms or a heteroaromatic ring having 2 to 30 carbon atoms;
• Ra, Rb, Rc, and Rd represent, at each occurrence identically or differently, mono-substitution, multiple substitutions or non-substitution;
• Ra, Rb, Rc, and Rd 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, a 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 Ra, Rb, Rc, and Rd can be optionally joined to form a ring;
• La, Lb, and Lc can be optionally joined to form a multi-dentate ligand;
• Lb and Lc are, at each occurrence identically or differently, selected from the group consisting of the following structures:
• wherein,
• Ri, Rii, and Riii represent, at each occurrence identically or differently, mono-substitution, multiple substitutions or non-substitution;
• Xa is, at each occurrence identically or differently, selected from the group consisting of:
• O, S, Se, NRN1, and CRC1RC2;
• Xb and Xc are, at each occurrence identically or differently, selected from the group consisting of:
• O, S, Se, and NRN2;
• Ri, Rii, Riii, RN1, RN2, RC1, and RC2 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, a 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 Ri, Rii, Riii, RN1, RN2, RC1, and RC2 can be optionally joined to form a ring.