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 composition comprising a first compound;
• wherein the first compound is capable of functioning as a phosphorescent emitter in an organic light emitting device at room temperature;
• wherein the first compound has at least one aromatic ring with at least one substituent R of Formula I:
• wherein R1 comprises at least one fluorine atom;
• wherein R2 represents mono to a maximum possible number of substitutions, or no substitution;
• wherein each R2 is a hydrogen or a substituent selected from the group consisting of deuterium, halide, alkyl, cycloalkyl, heteroalkyl, alylalkyl, 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 L is an organic linker or direct bond;
• wherein any two R1, R2 substituents may be joined or fused together to form a ring;
• wherein the dashed line of Formula I is a bond to a first aromatic ring of the at least one aromatic ring;
• and
• wherein n is an integer from 1 to 10.

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 comprising a first compound;
• wherein the first compound is capable of functioning as a phosphorescent emitter in an organic light emitting device at room temperature;
• wherein the first compound has at least one aromatic ring with at least one substituent R of Formula I:
• Formula I;
• wherein R1 comprises at least one fluorine atom;
• wherein R2 represents mono to a maximum possible number of substitutions, or no substitution;
• wherein each R2 is a hydrogen or a substituent selected from the group consisting of 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 L is an organic linker or direct bond;
• wherein any two R1, R2 substituents may be joined or fused together to form a ring;
• wherein the dashed line of Formula I is a bond to a first aromatic ring of the at least one aromatic ring;
• and
• wherein n is an integer from 1 to 10;
• wherein the consumer product is one of a flat panel display, a curved display, a computer monitor, a medical monitor, a television, a billboard, a light for interior or exterior illumination and/or signaling, a heads-up display, a fully or partially transparent display, a flexible display, a rollable display, a foldable display, a stretchable display, a laser printer, a telephone, a cell phone, tablet, a phablet, a personal digital assistant (PDA), a wearable device, a laptop computer, a digital camera, a camcorder, a viewfinder, a micro-display that is less than 2 inches diagonal, a 3-D display, a virtual reality or augmented reality display, a vehicle, a video wall comprising multiple displays tiled together, a theater or stadium screen, a light therapy device, or a sign.