Organic electroluminescent materials and devices
AssigneeUniversal Display Corporation
InventorsLichang Zeng, Chuanjun Xia, Zhiqiang Ji, Chun Lin
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Abstract
A compound having formula (LA)nIr(LB)3-n or formula (LA)mPt(LC)2-m is provided, in which the ligand LA has a structure of Formula I, wherein R has the structure of where two adjacent atoms from the four atoms marked with * are C and are fused to ring B. In Formulas I and II, ring A is a carbocyclic or heterocyclic ring; ring B is an aromatic ring; X is NR′, CR′R″, SiR′R″, O, S or Se; each of Z and X1 to X13 are carbon or nitrogen; R1, R2, R3, R4, R′, and R″ are each hydrogen or a substituent; LB is an unsubstituted or substituted phenyl pyridine bidentate ligand or its derivative; and LC is a bidentate ligand.
Claims23
A compound having a formula (LA)Pt(LC);
- wherein ligand LA comprises a structure of Formula I,
- wherein LC is a bidentate ligand;
- wherein LA is connected to LC to form a tetradentate ligand,
- wherein ring A is a 5-membered or 6-membered carbocyclic or heterocyclic ring;
- wherein ring B is a 5-membered aromatic ring;
- wherein R has the following formula II and uses two adjacent atoms from the four atoms marked with * to fuse to ring B:
- wherein X is selected from the group consisting of NR′, CR′R″, SiR′R″, O, S and Se;
- wherein Z is nitrogen or carbon;
- wherein X1 to X13 are carbon or nitrogen;
- wherein when R fuses to ring B, the two adjacent atoms from R and two adjacent atoms from ring B used to fuse to each other are all carbon;
- wherein R1, R2, R3, and R4 each independently represent from mono-substitution to the possible maximum number of substitution, or no substitution;
- wherein R1, R2, R3, R4, R′, and R″ 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;
- and
- wherein any two adjacent substituents are optionally joined to form a ring.
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 a formula (LA)Pt(LC);
- wherein ligand LA comprises a structure of Formula I,
- wherein LC is a bidentate ligand;
- wherein LA is connected to LC to form a tetradentate ligand,
- wherein ring A is a 5-membered or 6-membered carbocyclic or heterocyclic ring;
- wherein ring B is a 5-membered aromatic ring;
- wherein R has the formula II and uses two adjacent atoms from the four atoms marked with * to fuse to ring B:
- wherein X is selected from the group consisting of NR′, CR′R″, SiR′R″, O, S and Se;
- wherein Z is nitrogen or carbon;
- wherein X1 to X13 are carbon or nitrogen;
- wherein when R fuses to ring B, the two adjacent atoms from R and two adjacent atoms from ring B used to fuse to each other are all carbon;
- wherein R1, R2, R3, and R4 each independently represent from mono-substitution to the possible maximum number of substitution, or no substitution;
- wherein R1, R2, R3, R4, R′, and R″ 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;
- and
- wherein any two adjacent substituents are optionally joined to form a ring.
Dependencies are inferred from the claim text.