Organic electroluminescent materials and devices

A device comprising one or more organic light emitting devices, at least one of the one or more organic light emitting devices comprising:

• an anode;
• a cathode;
• and
• an organic layer, disposed between the anode and the cathode, comprising a compound having the structure of Formula I:
• A-L-B-M-D,
• where A is selected from the group consisting of:
• wherein L is a linker selected from the group consisting of a single bond, an aryl group having from 6-30 carbon atoms, a heteroaryl group having from 3-30 carbon atoms, and combinations thereof;
• wherein, when L is an aryl or heteroaryl group, L is optionally further substituted with one or more groups selected from hydrogen, deuterium, alkyl, cycloalkyl, aralkyl, alkoxy, aryloxy, amino, silyl, aryl, heteroaryl, and combinations thereof;
• wherein L-B-M has the structure:
• wherein M is selected from the group consisting of an aryl group having from 6-30 carbon atoms, a heteroaryl group having from 3-30 carbon atoms, and combinations thereof;
• wherein M is optionally further substituted with one or more groups selected from hydrogen, deuterium, alkyl, cycloalkyl, aralkyl, alkoxy, aryloxy, amino, silyl, aryl, heteroaryl, and combinations thereof;
• wherein D has the structure:
• wherein X is selected from the group consisting of S, Se and CR′R″;
• wherein X1, X2, X3, X4, X5, X6, X7, X8, Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, Y9, Y10, Y11, Y12, Z1, Z3, Z4, Z5, Z6, Z7, Z8, Z11, Z12, Z13, Z14, Z15, Z16, Z17, and Z18 are each independently N or CR;
• wherein each R, R′, and R″ is 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, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;
• and
• wherein adjacent R substituents can form a fused ring;
• and
• wherein R′ and R″ can form a ring.

A formulation comprising a compound having the structure of Formula I:

• A-L-B-M-D,
• wherein A is selected from the group consisting of:
• wherein L is a linker selected from the group consisting of a single bond, an aryl group having from 6-30 carbon atoms, a heteroaryl group having from 3-30 carbon atoms, and combinations thereof;
• wherein, when L is an aryl or heteroaryl group, L is optionally further substituted with one or more groups selected from hydrogen, deuterium, alkyl, cycloalkyl, aralkyl, alkoxy, aryloxy, amino, silyl, aryl, heteroaryl, and combinations thereof;
• wherein L-B-M has the structure:
• wherein M is selected from the group consisting of an aryl group having from 6-30 carbon atoms, a heteroaryl group having from 3-30 carbon atoms, and combinations thereof;
• wherein M is optionally further substituted with one or more groups selected from hydrogen, deuterium, alkyl, cycloalkyl, aralkyl, alkoxy, aryloxy, amino, silyl, aryl, heteroaryl, and combinations thereof;
• wherein D has the structure:
• wherein X is selected from the group consisting of S, Se and CR′R″;
• wherein X1, X2, X3, X4, X5, X6, X7, X8, Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, Y9, Y10, Y11, Y12, Z1, Z3, Z4, Z5, Z6, Z7, Z8, Z11, Z12, Z13, Z14, Z15, Z16, Z17, and Z18 are each independently N or CR;
• wherein each R, R′, and R″ is 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, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;
• and
• wherein adjacent R substituents can form a fused ring;
• and
• wherein R′ and R″ can form a ring.