Organic electroluminescent materials and devices
The present invention relates to organometallic complexes for use as emitters where a molecule of the compound has an orientation factor greater than 0.67, and devices, such as organic light emitting diodes, including the same.
1. A compound having a formula (L A ) m Ir(L B ) 3-m , wherein L A has a structure of Formula I
wherein m is 1 or 2;
wherein R 1 and R 2 each independently represent mono, di, tri, or tetra substitution, or no substitution;
wherein R 1 and R 2 are each independently hydrogen or a substituent selected from the group consisting of deuterium, C1 to C6 alkyl, C1 to C6 cycloalkyl, and partially or fully deuterated or fluorinated variants thereof; and
wherein L B is selected from the group consisting of:
2. The compound of claim 1 , wherein L B is selected from the group consisting of:
3. The compound of claim 1 , wherein R 6 is selected from the group consisting of partially deuterated or partially fluorinated alkyl having at least seven carbon atoms, partially deuterated or partially fluorinated cycloalkyl having at least seven carbon atoms, alkyl-cycloalkyl having at least seven carbon atoms, and partially or fully deuterated or fluorinated alkyl-cycloalkyl having at least seven carbon atoms.
4. The compound of claim 1 , wherein L A is selected from the group consisting of:
5. The compound of claim 4 , wherein the compound is Compound x having the formula Ir(L Af ) 2 (L Bk );
wherein x=227j+k−227, j is an integer from 1 to 112, 131 to 192, and 212 to 217, and k is an integer from 1 to 58, 60 to 86, 89 to 128, 132 to 138, 177, and 223;
wherein L B1 to L B58 , L B60 to L B86 , L B89 to L B128 , L B132 to L B138 , L B177 , and L B223 have the following structures:
6. The compound of claim 1 , wherein m is 2.
7. The compound of claim 1 , wherein R 1 and R 2 , are each independently selected from the group consisting of hydrogen, deuterium, methyl, ethyl, propyl, isopropyl, and combinations thereof.
8. A formulation comprising a compound according to claim 1 .
9. 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 (L A ) m Ir(L B ) 3-m , wherein L A has a structure of Formula I
wherein m is 1 or 2;
wherein R 1 and R 2 each independently represent mono, di, tri, or tetra substitution, or no substitution;
wherein R 1 and R 2 are each independently hydrogen or a substituent selected from the group consisting of deuterium, C1 to C6 alkyl, C1 to C6 cycloalkyl, and partially or fully deuterated or fluorinated variants thereof; and
wherein L B is selected from the group consisting of:
10. A device selected from the group consisting of a consumer product, an electronic component module, and a lighting panel, said device comprising an OLED according to claim 9 .
11. The OLED of claim 9 , wherein the organic layer is an emissive layer and the compound is an emissive dopant or a non-emissive dopant.
12. The OLED of claim 9 , wherein the organic layer further comprises a host, wherein host comprises at least one chemical group selected from the group consisting of triphenylene, carbazole, dibenzothiophene, dibenzofuran, dibenzoselenophene, azatriphenylene, azacarbazole, aza-dibenzothiophene, aza-dibenzofuran, and aza-dibenzoselenophene.
13. The OLED of claim 9 , wherein the organic layer further comprises a host, wherein the host is selected from the group consisting of:
and combinations thereof.
14. 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 a formula (L A ) m Ir(Le) 3-m , wherein L A has a structure of Formula I
wherein m is 1 or 2;
wherein R 1 and R 2 each independently represent mono, di, tri, or tetra substitution, or no substitution;
wherein R 1 and R 2 are each independently hydrogen or a substituent selected from the group consisting of deuterium, C1 to C6 alkyl, C1 to C6 cycloalkyl, and partially or fully deuterated or fluorinated variants thereof; and
wherein L B is selected from the group consisting of:
15. The consumer product of claim 14 , wherein the consumer product is selected from a flat panel display, a computer monitor, a medical monitor, a television, a billboard, lights for interior or exterior illumination and/or signaling, a heads-up display, a fully or partially transparent display, a flexible display, a laser printer, a telephone, a cell phone, a tablet, a phablet, a personal digital assistant (PDAs), a wearable device, a laptop computer, a digital camera, a camcorder, a viewfinder, a 3-D display, a vehicle, a wall, theater or stadium screen, or a sign.