Abstract: A compound having a Pt tetradentate structure of Formula 1, is provided. In the structure of Formula 1, rings C and D each independently represent 5- or 6-membered carbocyclic or heterocyclic ring; L1, L2, and L3 are each independently a direct bond, BR, NR, PR, O, S, Se, C?O, S?O, SO2, SiRR?, GeRR?, alkyl, cycloalkyl, or a combination thereof; the sum of n1 and n2 is 1 or 2; X is selected from NRE, O, S, and Se; X3 and X4 each independently carbon or nitrogen; and one of Q1, Q3, and Q4 is oxygen, and the remaining two of Q1, Q3, and Q4 each represents a direct bond. Formulations and devices, such as an OLEDs, that include the compound of Formula 1 are also described.

Abstract: Ligands with fused spirocyclic substitutions and metal complexes formed with such ligands and having improved performance in OLED applications are disclosed.

Abstract: A composition including a first compound capable of functioning as a phosphorescent emitter in an OLED is provided. The first compound has at least one aromatic ring and at least one substituent R directly bonded to one of the at least one aromatic rings. Each substituent R has the formula of where (a) G1 is selected from NR1, SiR1R2, GeR1R2, alkyl, cycloalkyl, and combinations thereof; and G2 is a non-aromatic polycyclic group; (b) G1 is a direct bond; and G2 is a non-aromatic spiro polycyclic group; or (c) G1 is selected from direct bond, NR1, SiR1R2, GeR1R2, alkyl, cycloalkyl, and combinations thereof; G2 is a non-aromatic polycyclic group; and R is directly bonded to a phenyl, pyridine, or triazine. R1, R2, and R3 are are a variety of substituents. Formulations and devices, such as an OLEDs, that include the first compound are also described.

Abstract: A compound having a Pt tetradentate structure of Formula 1, is provided. In the structure of Formula 1, rings C and D each independently represent 5- or 6-membered carbocyclic or heterocyclic ring; L1, L2, and L3 are each independently a direct bond, BR, NR, PR, O, S, Se, C?O, S?O, SO2, SiRR?, GeRR?, alkyl, cycloalkyl, or a combination thereof; the sum of n1 and n2 is 1 or 2; X is selected from NRE, O, S, and Se; X3 and X4 each independently carbon or nitrogen; and one of Q1, Q3, and Q4 is oxygen, and the remaining two of Q1, Q3, and Q4 each represents a direct bond. Formulations and devices, such as an OLEDs, that include the compound of Formula 1 are also described.

Abstract: A compound having the formula: Formula I is disclosed. The compound is useful as emitters in OLEDs.

Abstract: A compound having the formula [LA]yIr[LB]x is disclosed, where LA is selected from one of the following: The compounds have at least one pyridyl dibenzo-substituted ligand that coordinates to metal center from the sterically hindered position as exemplified by LA. Because of this unique configuration, the compounds display better photo-physical and thermal properties and can be used in OLED devices to improve their performance, particularly with respect to the device's lifetime.

Abstract: A compound having the formula (LA)mIr(LB)3-m, where LA is and LB is is disclosed. In the formula (LA)mIr(LB)3-m, LA and LB are different; each of X1 to X5 is C—RF or nitrogen; X is selected from O, S, and Se; each R1, R2, RB, RD, and RF is hydrogen or a substituent; R3 is alkyl, cycloalkyl, or a combination thereof; and m is 1 or 2. OLEDs, consumer products, and formulations including the compound are also disclosed.

Abstract: A compound having a formula (LA)mIr(LB)3-m having a structure selected from is disclosed. In the structures of formula (LA)mIr(LB)3-m, m is 1 or 2, R1, R2, R3, R4, and R5 are each independently selected from hydrogen, deuterium, C1 to C6 alkyl, C1 to C6 cycloalkyl, and partially or fully deuterated variants thereof, and partially or fully fluorinated variants thereof, and, R6 is selected from C1 to C6 alkyl, C1 to C6 cycloalkyl, and partially or fully deuterated variants thereof, and partially or fully fluorinated variants thereof.

Abstract: Metal complexes with cyclic ligands having Formula (I), are disclosed. Ligands with cyclic structure are believed to be beneficial to the rigidity and stability of the metal complexes, which is desirable for improving OLED device performance.

Abstract: A compound having the formula: Formula I is disclosed. The compound is useful as emitters in OLEDs.

Abstract: A compound having the formula (LA)mIr(LB)3-m, where LA is and LB is selected from is disclosed. In the formula (LA)mIr(LB)3-m, LA and LB are different; each of X1 to X5 is C—RF or nitrogen; X is selected from O, S, and Se; each R1, R2, RB, RD, RE, and RF is hydrogen or a substituent; R3 is alkyl, cycloalkyl, or a combination thereof; and m is 1 or 2. OLEDs, consumer products, and formulations including the compound are also disclosed.

Abstract: A compound having a Pt tetradentate structure of Formula 1, is provided. In the structure of Formula 1, rings C and D each independently represent 5- or 6-membered carbocyclic or heterocyclic ring; L1, L2, and L3 are each independently a direct bond, BR, NR, PR, O, S, Se, C?O, S?O, SO2, SiRR?, GeRR?, alkyl, cycloalkyl, or a combination thereof; the sum of n1 and n2 is 1 or 2; X is selected from NRE, O, S, and Se; X3 and X4 each independently carbon or nitrogen; and one of Q1, Q3, and Q4 is oxygen, and the remaining two of Q1, Q3, and Q4 each represents a direct bond. Formulations and devices, such as an OLEDs, that include the compound of Formula 1 are also described.

Abstract: A compound having a formula (LA)mIr(LB)3?m having a structure selected from is disclosed. In the structures of formula (LA)mIr(LB)3-m, m is 1 or 2, R1, R2, R3, R4, and R5 are each independently selected from hydrogen, deuterium, C1 to C6 alkyl, C1 to C6 cycloalkyl, and partially or fully deuterated variants thereof, and partially or fully fluorinated variants thereof, and, R6 is selected from C1 to C6 alkyl, C1 to C6 cycloalkyl, and partially or fully deuterated variants thereof, and partially or fully fluorinated variants thereof.

Abstract: A composition including a first compound capable of functioning as a phosphorescent emitter in an OLED is provided. The first compound has at least one aromatic ring and at least one substituent R directly bonded to one of the at least one aromatic rings. Each substituent R has the formula of where (a) G1 is selected from NR1, SiR1R2, GeR1R2, alkyl, cycloalkyl, and combinations thereof; and G2 is a non-aromatic polycyclic group; (b) G1 is a direct bond; and G2 is a non-aromatic spiro polycyclic group; or (c) G1 is selected from direct bond, NR1, SiR1R2, GeR1R2, alkyl, cycloalkyl, and combinations thereof; G2 is a non-aromatic polycyclic group; and R is directly bonded to a phenyl, pyridine, or triazine. R1, R2, and R3 are a variety of substituents. Formulations and devices, such as an OLEDs, that include the first compound are also described.

Abstract: Organometallic compounds comprising an imidazole carbene ligand having a N-containing ring fused to the imidazole ring are provided. In particular, the N-containing ring fused to the imidazole ring may contain one nitrogen atom or more than one nitrogen atom. These compounds may demonstrate high photoluminescent (PL) efficiency, Gaussian emission spectra, and/or short excited state lifetimes. These materials may be especially useful as blue phosphorescent emitters.

Abstract: Metal complexes with cyclic ligands having Formula (I), are disclosed. Ligands with cyclic structure are believed to be beneficial to the rigidity and stability of the metal complexes, which is desirable for improving OLED device performance.

Abstract: A compound having a Pt tetradentate structure of Formula 1, is provided. In the structure of Formula 1, rings C and D each independently represent 5- or 6-membered carbocyclic or heterocyclic ring; L1, L2, and L3 are each independently a direct bond, BR, NR, PR, O, S, Se, C?O, S?O, SO2, SiRR?, GeRR?, alkyl, cycloalkyl, or a combination thereof; the sum of n1 and n2 is 1 or 2; X is selected from NRE, O, S, and Se; X3 and X4 each independently carbon or nitrogen; and one of Q1, Q3, and Q4 is oxygen, and the remaining two of Q1, Q3, and Q4 each represents a direct bond. Formulations and devices, such as an OLEDs, that include the compound of Formula 1 are also described.

Abstract: A compound having the formula: Formula I is disclosed. The compound is useful as emitters in OLEDs.

Abstract: A compound having the formula Ir(LA)n(LB)3-n is disclosed wherein LA is an aza-DBF ligand and LB is an alkyl-substituted phenylpyridine ligand, wherein the compound has a structure according to Formula I: wherein each of A1 to A8 comprise carbon or nitrogen; wherein at least one of A1 to A8 is nitrogen; wherein ring B is bonded to ring A through a C—C bond; wherein the iridium is bonded to ring A through a Ir—C bond; wherein X is O, S, or Se; wherein R? and R? each independently represent mono-, di-substitution, or no substitution; wherein any adjacent substitutions in R?, R?, R1, R2, R3, R4, R5, and R6 are optionally linked together to form a ring; wherein R1, R2, R?, and R? are each independently selected from a variety of substituents; wherein R3, R4, R5, and R6 are each independently selected from the group consisting of hydrogen, deuterium, alkyl, cycloalkyl, and combinations thereof; wherein n is an integer from 1 to 3; and wherein total number of carbons in at least one of the pairs R3 and R4, and

Abstract: Ligands with fused spirocyclic substitutions and metal complexes formed with such ligands and having improved performance in OLED applications are disclosed.