ORGANIC LIGHT EMITTING DISPLAY DEVICE

• US 20160164004A1
• Filed: 12/01/2015
• Published: 06/09/2016
• Est. Priority Date: 12/08/2014
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Seo, Jeongdae, Han, Changwook, Joo, Sunghoon, Kim, Hyoseok, KANG, Hyeseung, YOO, Seonkeun, Park, JungSoo
• Granted Patent: US 9,893,298 B2
• Time in Patent Office: Days
• CPC Class Codes: C07D 401/10 linked by a carbon chain containing aromatic rings
• CPC Class Codes: C09K 11/025 non-luminescent particle coatings or suspension media
• CPC Class Codes: H10K 2101/90 Multiple hosts in the emissive layer
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/131 with spacer layers between the electroluminescent layers
• CPC Class Codes: H10K 50/15 Hole transporting layers
• CPC Class Codes: H10K 50/16 Electron transporting layers
• CPC Class Codes: H10K 50/19 Tandem OLEDs
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/32 Stacked devices having two or more layers, each emitting at different wavelengths
• CPC Class Codes: H10K 85/626 containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene
• CPC Class Codes: H10K 85/654 comprising only nitrogen as heteroatom H10K85/652 takes precedence
• CPC Class Codes: H10K 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole

Abstract

An organic light emitting display device is disclosed. The organic light emitting display device comprises an emitting layer over an anode, the light emitting part having an emitting layer and an electron transporting layer, and a cathode on the light emitting part, wherein each of the emitting layer and the electron transporting layer includes a compound with the same core to facilitate electron transport from the electron transporting layer to the emitting layer.

Claims

1. An organic light emitting display device, comprising:

a first light emitting part between an anode and a cathode, the first light emitting part having a first emitting layer and a first electron transport layer; and

a second light emitting part over the first light emitting part, the second light emitting part having a second emitting layer and a second electron transport layer,

wherein at least one among the first and second emitting layers includes a compound represented by the following Chemical Formula 1, and at least one among the first and second electron transport layers includes a compound represented by the following Chemical Formula 2 or Chemical Formula 3;

2. The organic light emitting display device of claim 1, wherein the compound represented by Chemical Formula 1 includes one among the following compounds:

3. The organic light emitting display device of claim 1, wherein the compound represented by Chemical Formula 2 includes one among the following compounds E01, E02, E04, and E05, and the compound represented by Chemical Formula 3 includes one among the following compounds E03, E06, E07, E08, E09, and E10:

4. The organic light emitting display device of claim 1, wherein the first and second emitting layers each include an electron-type host and a hole-type host, and the electron-type host of at least one among the first and second emitting layers includes the compound represented by Chemical Formula 1.

5. The organic light emitting display device of claim 1, further comprising a third light emitting part over the second light emitting part, the third light emitting part having a third emitting layer and a third electron transport layer,

wherein at least one among the first, second, and third emitting layers includes the compound represented by Chemical Formula 1, and at least one among the first to third electron transport layers includes the compound represented by Chemical Formula 2 or Chemical Formula 3.

6. The organic light emitting display device of claim 5, wherein the first, second, and third emitting layers each include an electron-type host and a hole-type host, and an electron-type host of at least one among the first, second, and third emitting layers includes the compound represented by Chemical Formula 1.

7. An organic light emitting display device, comprising:

a light emitting part over an anode, the light emitting part having an emitting layer and an electron transport layer; and

a cathode over the light emitting part,

wherein the emitting layer and the electron transport layer include a compound with the same core to facilitate electron transport from the electron transport layer to the emitting layer.

8. The organic light emitting display device of claim 7, wherein the compound with the same core includes a triazine-containing heteroaromatic ring compound.

9. The organic light emitting display device of claim 7, wherein the emitting layer includes an electron-type host and a hole-type host, and the electron-type host includes the compound.

10. The organic light emitting display device of claim 7, wherein the emitting layer includes a compound represented by the following Chemical Formula 1, and the electron transport layer includes a compound represented by the following Chemical Formula 2 or Chemical Formula 3:

11. The organic light emitting display device of claim 10, wherein the compound represented by Chemical Formula 1 includes one among the following compounds:

12. The organic light emitting display device of claim 10, wherein the compound represented by Chemical Formula 2 includes one among the following compounds E01, E02, E04, and E05, the compound represented by Chemical Formula 3 includes one among the following compounds E03, E06, E07, E08, E09, and E10:

13. The organic light emitting display device of claim 7, wherein the light emitting part includes:

a first light emitting part having a first emitting layer and a first electron transport layer; and

a second light emitting part having a second emitting layer and a second electron transport layer.

14. The organic light emitting display device of claim 13, wherein the second emitting layer includes a yellow-green or green emitting layer, and an electron-type host of the yellow-green or green emitting layer and the second electron transporting layer includes the compound to improve the lifetime and efficiency of the yellow-green emitting layer.

15. The organic light emitting display device of claim 14, wherein the light emitting part further includes a third light emitting part, the third light emitting part having a third emitting layer and a third electron transport layer.