Abstract: A compound of Formula I, is provided. In Formula I, moiety A and moiety B are monocyclic rings or polycyclic ring structures; X1 and X2 are C or N; each RA, RB, RC, RD, RE, RF, and RX is hydrogen or a substituent; at least one of RA, RB, RC, RD, RE, RF, and RX comprises a silyl group; if n=1, then RD is joined with RF to form a ring; if n=0 and m=1, then RD is joined with either RE or RA to form a ring, with the proviso that if RD is joined to RA, then RX is a substituted or unsubstituted aryl or heteroaryl group; and if n=0 and m=0, then the compound has the structure of Formula V, Formulations, OLEDs, and consumer products comprising the compound are also provided.

Abstract: Provided are organometallic compounds. Also provided are formulations comprising these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.

Abstract: Provided are compounds having the structure of Formula I: wherein rings A, B, and D are each independently a 5-membered or 6-membered carbocyclic or heterocyclic ring; X1-X9 are each independently C or N; Y1 is selected from the group consisting of a direct bond, O, S, Se, NR, SiRR?, CRR?, and P(O)R; R, R?, RA, RB, RC, and RD each independently represents mono to the maximum allowable substitution, or no substitution; each R, R?, RA, RB, RC, and RD is independently a hydrogen or a substituent; and any two adjacent groups of RA, RB, RC, and RD may be joined or fused to form a ring Also provided are formulations comprising these compounds. Further provided are OLEDs and related consumer products that utilize these compounds.

Abstract: A hybrid emissive layer and OLED incorporating the same are provided. The hybrid emissive layer includes a first material having a triplet state energy level T1H and a singlet state energy level S1H, a second material having a triplet state energy level T1F and a singlet state energy level S1F; and a third material having a triplet state energy level T1P and a single state energy level S1P, where T1F?T1H; S1F?S1H; and T1P<T1H.