| 摘要 |
The OLEDs of the present invention are characterized by providing an organic thin film layer comprising a single layer or plural layers between a cathode and an anode, wherein the organic thin film layer comprises at least one organic light emitting layer, wherein at least one light emitting layer comprises at least one host material and at least one phosphorescent emitter material, wherein the host material comprises a bis-carbazole derivative host material;
and the phosphorescent emitter material comprises a phosphorescent organometallic complex having a substituted chemical structure represented by one of the following partial chemical structures represented by the formula:
LL′L″Mwherein M is a metal that forms octahedral complexes,L, L′, L″ are equivalent or inequivalent bidentate ligands wherein each L comprises a substituted or unsubstituted phenylpyridine ligand coordinated to M through an sp2 hybridized carbon and N;and one of L, L′ and L″ is inequivalent to at least one of the other two. |
| 主权项 |
1. An organic light emitting device comprising an anode, a cathode and an emissive layer, wherein the emissive layer is located between the anode and the cathode, and the emissive layer comprises a host material and a phosphorescent emitter material, wherein:
the host material has the chemical structure represented by formula (3): wherein A1 is selected from the group consisting of a substituted or unsubstituted pyridine ring, pyrimidine ring, and triazine ring; A2 represents a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring-forming carbon atoms or a substituted or unsubstituted nitrogen-containing heterocyclic group having 1 to 30 ring-forming carbon atoms; X1 and X2 are bonding groups, X1 and X2 respectively independently representing a single bond and a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring-forming carbon atoms;
Y1 to Y4 independently represent;
a hydrogen atom;a fluorine atom;a cyano group;a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms;a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms;a substituted or unsubstituted haloalkyl group having 1 to 20 carbon atoms;a substituted or unsubstituted haloalkoxy group having 1 to 20 carbon atoms;a substituted or unsubstituted alkylsilyl group having 1 to 10 carbon atoms;a substituted or unsubstituted arylsilyl group having 6 to 30 carbon atoms;a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring-forming carbon atoms;a substituted or unsubstituted condensed aromatic hydrocarbon group having 6 to 30 ring-forming carbon atoms;a substituted or unsubstituted aromatic heterocyclic group having 2 to 30 ring-forming carbon atoms; ora substituted or unsubstituted condensed aromatic heterocyclic group having 2 to 30 ring-forming carbon atoms, adjacent ones of Y1 to Y4 being bondable with each other to form a ring structure, andp and q represent integers in a range from 1 to 4 and r and s represent integers in a range from 1 to 3, Y1 to Y4 being the same as or different from each other when p and q represent integers in a range from 2 to 4 and r and s represent integers in a range from 2 to 3; andthe phosphorescent emitter material comprises a phosphorescent organometallic complex having a substituted chemical structure represented by one of the following partial chemical structures of the formula:
LL′L″M wherein M is a metal that forms octahedral complexes, L, L′, L″ are equivalent or inequivalent bidentate ligands wherein each L comprises a substituted or unsubstituted phenylpyridine ligand coordinated to M through an sp2 hybridized carbon and N; and one of L, L′ and L″ is inequivalent to at least one of the other two, wherein the phosphorescent emitter material comprises a phosphorescent organometallic compound having a substituted chemical structure represented by the following chemical structure: where each R is independently selected from the group consisting of H, alkyl, alkenyl, alkynyl, alkylaryl, CN, CF3, CnF2n+1, trifluorovinyl, CO2R, C(O)R, NR2, NO2, OR, halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl or a heterocyclic group; Ar′, Ar″, Ar′″ and Ar″″ each independently represent a substituted or unsubstituted aryl or heteroaryl unfused substituent on the phenylpyridine ligand; a is 0 or 1; b is 0 or 1; c is 0 or 1; d is 0 or 1; m is 1 or 2; n is 1 or 2; m+n is the maximum number of ligands that can be coordinated to M, and wherein at least one of a, b, c, and d is 1 and when at least one of a and b is 1 and at least one of b and c is 1, at least one of Ar′ and Ar″ is different from at least one of Ar′″ and Ar″″. |
