CPC H10K 85/342 (2023.02) [C07F 15/0033 (2013.01); C09K 11/06 (2013.01); H10K 85/40 (2023.02); H10K 85/615 (2023.02); H10K 85/622 (2023.02); H10K 85/626 (2023.02); H10K 85/654 (2023.02); H10K 85/657 (2023.02); H10K 85/6572 (2023.02); H10K 85/6576 (2023.02); C09K 2211/1033 (2013.01); C09K 2211/1037 (2013.01); C09K 2211/185 (2013.01); H10K 50/11 (2023.02); H10K 2101/10 (2023.02)] | 20 Claims |
1. A compound having a metal coordination complex structure;
wherein the compound is capable of functioning as a phosphorescent emitter in an organic light emitting device at room temperature;
wherein the compound has a formula of Pt(LA)(LB), wherein LA and LB are each independently selected from the group consisting of:
![]() ![]() wherein LA and LB may be joined to form a tetradentate ligand;
wherein each X1 to X13 are independently selected from the group consisting of carbon and nitrogen;
wherein X is selected from the group consisting of BR′, NR′, PR′, O, S, Se, C═O, S═O, SO2, CR′R″, SiR′R″, and GeR′R″;
wherein R′ and R″ are optionally fused or joined to form a ring;
wherein each Ra, Rb, Rc, and Rd may represent from mono substitution to the maximum possible number of substitution, or no substitution;
wherein R′, R″, Ra, Rb, Rc, and Rd are each independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and
wherein any two adjacent substituents of Ra, Rb, Rc, and Rd are optionally fused or joined to form a ring or form a tetradentate ligand;
wherein a free-state of ligand LA or a tetradentate ligand when LA and LB are joined together has a first triplet energy T1 of EL at 77K;
wherein the compound has a first triplet energy T1 of E at 77K;
wherein the difference in energy between E and EL is ΔE;
wherein ΔE is ≤250 meV; and
wherein the compound has a triplet emission spectrum with a full width at half maximum (FWHM) value of no more than 45 nm at 22° C.
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