Red-emitting organic electroluminescent device

• US 5,409,783 A
• Filed: 02/24/1994
• Issued: 04/25/1995
• Est. Priority Date: 02/24/1994
• Status: Expired due to Term

• Current Assignee: Global OLED Technology LLC (LG Display Co., Ltd.)
• Original Assignee: Eastman Kodak Company
• Inventors: Comfort, Dustin L., Weidner, Charles H., Tang, Ching W.
• Primary Examiner(s): Nold, Charles R.
• Application Number:
  US08/201,292
• Time in Patent Office: 425 Days
• Field of Search: 428/690, 428/691, 428/917, 313/501, 313/504, 313/506
• US Class Current: 428/690
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: H05B 33/14 characterised by the chemical or physical composition or the arrangement of the electroluminescent material , or by the simultaneous addition of the electroluminescent material in or onto the light source
• CPC Class Codes: Y10S 428/917 Electroluminescent

Abstract

Disclosed is a red-emitting organic electroluminescent device comprising in sequence an anode, an organic hole injecting and transporting zone, a doped luminescent zone, an electron transport zone and a cathode, characterized in that said doped luminescent zone is comprised of a fluorescent phthalocyanine compound capable of emitting a wavelength in the range of 660 to 780 nm.

Claims

1. An organic electroluminescent device comprising in sequence an anode, an organic hole injecting and transporting zone, a doped luminescent zone, an electron transport zone and a cathode, characterized in that said doped luminescent zone is comprised of a fluorescent phthalocyanine compound capable of emitting a wavelength in the range of 660 to 780 nm wherein the phthalocyanine compound constitutes 0.01 to 3 vol. % of the doped luminescent zone.

2. The organic electroluminescent device in accordance with claim 1 wherein said phthalocyanine compound has the structure:

##STR14## wherein M is selected from 2H and a metal,

X is selected from hydrogen, halogen and a steric group, and

(Y)B wherein B is 0 or 1, and Y is one of the group consisting of a halogen, alkoxyl and phenoxyl containing compound when B is 1.

3. The organic electroluminescent device in accordance with claim 2 wherein M is a metal selected from the group consisting of Mg, Li, Na, Ca, Zn, Al, Ga and In.

4. The organic electroluminescent device in accordance with claim 1 wherein the steric group is selected from methyl, ethyl, pentyl, t-butyl, t-amyl and methoxy group.

5. The organic electroluminescent device in accordance with claim 2 wherein the halogen is selected from Cl, F and Br.

6. The organic electroluminescent device in accordance with claim 1 wherein the phthalocyanine compound is a metal-free phthalocyanine compound.

7. The organic electroluminescent device in accordance with claim 1 wherein the electroluminescent device has an emission wavelength beyond the visible range.

8. The organic electroluminescent device in accordance with claim 1 wherein the phthalocyanine compound constitutes 0.05 to 1 vol. % of the doped luminescent zone.

9. The organic electroluminescent device in accordance with claim 1 wherein the doped luminescent zone is comprised of a phthalocyanine compound and a host material comprised of metalized oxines.

10. The organic electroluminescent device in accordance with claim 1 wherein the doped luminescent zone is comprised of a phthalocyanine compound and a host material comprised of Tris(8-quinolinol)aluminum.

11. A red-emitting organic electroluminescent device comprising in sequence an anode, an organic hole injecting and transporting zone, a doped luminescent zone, an electron transport zone and a cathode, characterized in that said doped luminescent zone is comprised of a fluorescent phthalocyanine compound and wherein the phthalocyanine compound constitutes 0.01 to 3 vol. % of the doped luminescent Zone and having the structure:

##STR15## wherein;

M is selected from 2H and a metal,

X₁ or X₂ is one of the group selected from hydrogen, halogen, C_n H_2n+1 where n is 0 to 20, and cyano groups, and

(Y)_B wherein B is 0 or 1, and Y is selected from the group consisting of halogen, alkoxyl and phenoxyl containing compounds when B is 1.

12. A red-emitting organic electroluminescent device comprising in sequence an anode, an organic hole injecting and transporting zone, a doped luminescent zone, an electron transport zone and a cathode, characterized in that said doped luminescent zone is comprised of a fluorescent phthalocyanine compound and wherein the phthalocyanine compound constitutes 0.01 to 3 vol. % of the doped luminescent gone and having the structure:

##STR16## wherein;

M is selected from the group consisting of Mg, Li, Na, Ca, Zn, Al, Ga and In,

X is selected from H,

(Y)_B wherein B is 0 or 1, and Y is selected from the group consisting of Cl and F when B is 1.