Organic electroluminescence device

• US 8,048,541 B2
• Filed: 12/17/2008
• Issued: 11/01/2011
• Est. Priority Date: 12/17/2008
• Status: Expired due to Fees

• Current Assignee: City University of Hong Kong
• Original Assignee: City University of Hong Kong
• Inventors: Lee, Shuit-Tong, Lee, Chun Sing, Wang, Pengfei, Xie, Zhiyuan
• Primary Examiner(s): Chriss; Jennifer
• Assistant Examiner(s): CLARK, GREGORY D
• Application Number:
  US12/336,734
• Publication Number:
  US 20100148662A1
• Time in Patent Office: 1,049 Days
• Field of Search: 428/690, 313/504, 313/505, 313/506, 544/234
• US Class Current: 428/690
• CPC Class Codes: C07D 241/46 Phenazines
• CPC Class Codes: C07D 401/04 directly linked by a ring-member-to-ring-member bond
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1029 containing one nitrogen atom as the heteroatom
• CPC Class Codes: C09K 2211/1044 containing two nitrogen atoms as heteroatoms
• 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

Abstract

An electroluminescence device has an anode, a cathode and an emitting layer located between the anode and the cathode. The emitting layer contains a compound selected from a group consisting of neutral red and its derivatives.

Claims

1. An electroluminescence device comprising an anode, a cathode, and an emitting layer located between the anode and the cathode, wherein the emitting layer contains a compound of formula I:

2. The electroluminescence device of claim 1 further comprising a hole transport layer adjacent to the anode and an electron transport layer adjacent to the cathode, wherein the emitting layer is located between the hole transport layer and the electron transport layer.

3. The electroluminescence device of claim 2, wherein the emitting layer comprises an organic light-emitting host material doped with the compound of formula I.

4. The electroluminescence device of claim 3 wherein the organic light-emitting host material is a fluorescent or phosphorescent compound.

5. An electroluminescence device comprising an anode, a cathode, and an emitting layer located between the anode and the cathode, wherein the emitting layer contains a compound of formula IV:

6. The electroluminescence device of claim 5 further comprising a hole transport layer adjacent to the anode and an electron transport layer adjacent to the cathode, wherein the emitting layer is located between the hole transport layer and the electron transport layer.

7. The electroluminescence device of claim 6, wherein the emitting layer comprises an organic light-emitting host material doped with the compound of formula IV.

8. The electroluminescence device of claim 7 wherein the organic light-emitting host material is a fluorescent or phosphorescent compound.

9. A method of making an electroluminescence device comprising an anode, a cathode, and an emitting layer located between the anode and the cathode, the method comprising:

doping the emitting layer with a compound of formula I;

10. A method of making an electroluminescence device comprising an anode, a cathode, and an emitting layer located between the anode and the cathode, the method comprising:

doping the emitting layer with a compound of formula IV;