Organic electroluminescent materials and devices

An organic light emitting device (OLED) comprising:

• an anode;
• a cathode;
• and
• an organic layer, disposed between the anode and the cathode, comprising a compound having the formula Ir(LA)n(LB)3−n, having the structure:
• wherein each of Z1, Z2, Z3, and Z4 is CR2;
• wherein X is O, S, or Se;
• wherein n is 1 or 2;
• wherein R1, R2, R3, R4, and R5 each independently represent mono- to a maximum possible number of substitutions, or no substitution;
• wherein R1, R2, R3, R4, and R5 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;
• wherein any substitutions in R1, R2, R3, R4, and R5 are optionally joined to form a ring;
• wherein at least one pair of substitutions in R1, R2, R3, R4, or R5 are joined together to form a bridge structure comprising a backbone structure that forms a fused first ring, which can be further substituted;
• and
• wherein the backbone structure is saturated.

A consumer product comprising an organic light-emitting device (OLED) comprising:

• an anode;
• a cathode;
• and
• an organic layer, disposed between the anode and the cathode, comprising a compound having the formula Ir(LA)n(LB)3−n, having the structure:
• wherein each of Z1, Z2, Z3, and Z4 is CR2;
• wherein X is O, S, or Se;
• wherein n is 1 or 2;
• wherein R1, R2, R3, R4, and R5 each independently represent mono- to a maximum possible number of substitutions, or no substitution;
• wherein R1, R2, R3, R4, and R5 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;
• wherein any substitutions in R1, R2, R3, R4, and R5 are optionally joined to form a ring;
• wherein at least one pair of substitutions in R1, R2, R3, R4, or R5 are joined together to form a bridge structure comprising a backbone structure that forms a fused first ring, which can be further substituted;
• and
• wherein the backbone structure is saturated.