Hole injection layer and charge generation layer containing a truxene based compound
Hole injection layer and charge generation layer containing a truxene based compound are disclosed for organic electronic devices. By applying the truxene based compound for the hole injection layer, low driving voltage, high efficiency and long lifetime of the device can be achieved. In addition, a P-type charge generation layer comprising the truxene based compound can be used in tandem OLEDs structure and can further improve the voltage, efficiency and lifetime of the device.
1. An organic electroluminescent device comprising:
an anode,
a cathode, and
a hole injection layer disposed between the anode and cathode, wherein the hole injection layer comprises a compound selected from the group consisting of:
2. The device of claim 1 , wherein the hole injection layer comprising the compound is in contact with the anode.
3. The device of claim 1 , wherein the hole injecting layer is a layer consisting entirely of the compound.
4. The device of claim 1 , wherein the hole injection layer further comprises an aromatic amine compound, and wherein the aromatic amine compound is doped with the compound.
5. The device of claim 4 , wherein the aromatic amine compound is selected from the group consisting of:
6. A tandem organic electrolurninescent device comprises:
an anode,
a cathode,
a charge generation layer disposed between the anode and cathode, wherein the charge generation layer comprises a compound selected from the group consisting of:
7. The device of claim 6 , wherein the charge generation layer is a layer consisting entirely of the compound.
8. The device of claim 6 , wherein the charge generation layer is a P-type charge generation layer.
9. The device of claim 6 , wherein the charge generation layer further comprises an aromatic amine compound.
10. The device of claim 9 , wherein the aromatic amine compound is selected from the group consisting of:
11. A compound having a structure selected from the group consisting of:
12. The device of claim 1 , wherein the device further includes a hole transport layer.