Electroluminescent devices
An electroluminescent device has, as the electroluminescent layer, a metal compound selected from organic complexes of non rare earth metals.
1. An electroluminescent device comprising:
(i) a first electrode;
(ii) a second electrode; and
(iii) a layer of an electroluminescent material positioned between said first and second electrodes, wherein said electroluminescent material contains a blue light-emitting metal compound selected from the group consisting of chemical compounds having one of the following formulas
2. The device of claim 1 wherein there is a layer of a hole transmitting material between the first electrode and the layer of electroluminescent material.
3. The device of claim 2 , wherein the hole transmitting layer comprises N,N′-diphenyl-N,N′-bis(3-methylphenyl)-1,1′-biphenyl-4,4′-diamine (TPD).
4. The device of claim 1 wherein there is a layer of an electron transmitting material between the second electrode and the layer of electroluminescent material.
5. The device of claim 4 wherein the electron transmitting material comprises a metal quinolate.
6. The device of claim 5 wherein the metal quinolate is aluminum quinolate or lithium quinolate.
7. An electroluminescent device comprising:
(i) a first electrode;
(ii) a second electrode;
(iii) a layer of an electroluminescent material positioned between said first and second electrodes, wherein said electroluminescent material contains a blue light-emitting metal compound having one of the following formulas
(iv) a layer of a hole transmitting material between the first electrode and the layer of electroluminescent material; and
(v) a layer of an electron transmitting material between the second electrode and the layer of electroluminescent material.
8. An electroluminescent device according to claim 7 , wherein the layer of hole transmitting material comprises N,N′-diphenyl-N,N′-bis(3-methylphenyl)-1,1′-biphenyl-4,4′-diamine (TPD).
9. An electroluminescent device according to claim 7 wherein the layer of electron transmitting material comprises a metal quinolate.
10. An electroluminescent device according to claim 7 wherein the layer of electron transmitting material comprises aluminum quinolate or lithium quinolate.
11. An electroluminescent device comprising:
(i) a first electrode;
(ii) a second electrode;
(iii) a layer of an electroluminescent material positioned between said first and second electrodes, wherein said electroluminescent material contains a blue light-emitting metal compound having one of the following formulas
(iv) a layer of a hole transmitting material between the first electrode and the layer of electroluminescent material, wherein the layer of hole transmitting material comprises N,N′-diphenyl-N,N′-bis(3-methylphenyl)-1,1′-biphenyl-4,4′-diamine (TPD); and
(v) a layer of an electron transmitting material between the second electrode and the layer of electroluminescent material, wherein the layer of electron transmitting material comprises aluminum quinolate or lithium quinolate.
12. An electroluminescent device comprising:
(i) a first electrode;
(ii) a second electrode; and
(iii) a layer of an electroluminescent material positioned between said first and second electrodes, wherein said electroluminescent material contains a blue light-emitting metal compound having the following formula
13. The device of claim 12 wherein there is a layer of a hole transmitting material between the first electrode and the layer of electroluminescent material.
14. The device of claim 13 wherein the hole transmitting layer comprises N,N′-diphenyl-N,N′-bis(3-methylphenyl)-1,1′-biphenyl-4,4′-diamine (TPD).
15. The device of claim 12 wherein there is a layer of an electron transmitting material between the second electrode and the layer of electroluminescent material.
16. The device of claim 15 wherein the electron transmitting material comprises a metal quinolate.
17. The device of claim 16 wherein the metal quinolate is aluminum quinolate or lithium quinolate.