Organic light emitting display device

Patent metadata

Field	Value
Publication number	US-2017054084-A1
Application number	US-201615147395-A
Country	US
Kind code	A1
Filing date	May 5, 2016
Priority date	Aug 21, 2015
Publication date	Feb 23, 2017
Grant date	—

Abstract

An organic light emitting display device is discussed. The organic light emitting display device can include at least two or more light emitting parts each including a light emitting layer and an electron transport layer; and a charge generation layer between the two or more light emitting parts and including an N-type charge generation layer, wherein the electron transport layer includes an electron transport compound including a functional group with high electron mobility, and the N-type charge generation layer includes a charge generation compound including a functional group for matching the energy level of the electron transport compound.

First claim

What is claimed is:

1 . An organic light emitting display device comprising:
at least two or more light emitting parts each comprising a light emitting layer and an electron transport layer; and a charge generation layer between the at least two or more light emitting parts and including an N-type charge generation layer, wherein the electron transport layer includes an electron transport compound having a functional group with high electron mobility, and the N-type charge generation layer includes a charge generation compound including a functional group for matching the energy level of the electron transport compound.

2 . The organic light emitting display device of claim 1 , wherein electron transfer from the N-type charge generation layer to the electron transport layer is facilitated by the functional group for matching the energy level of the electron transport compound.

3 . The organic light emitting display device of claim 1 , wherein the functional group for matching the energy level of the electron transport compound comprises a naphthyl group.

4 . The organic light emitting display device of claim 1 , wherein the functional group with high electron mobility comprises a p-biphenyl group.

5 . The organic light emitting display device of claim 1 , wherein the charge generation compound further comprises a functional group with high electron mobility.

6 . The organic light emitting display device of claim 1 , wherein the electron transport compound includes a triazine compound, and the charge generation compound includes a phenanthroline compound.

7 . The organic light emitting display device of claim 1 , wherein the electron transport layer and the N-type charge generation layer adjoin each other.

8 . The organic light emitting display device of claim 1 , wherein the electron transport compound is represented by the following Chemical Formula 1:

wherein Ar includes a substituted or unsubstituted aryl group of 6 to 30 carbon atoms, R 1 and R 2 include independently one among a substituted or unsubstituted alkyl group of 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group of 1 to 6 carbon atoms, and a substituted or unsubstituted aryl group of 6 to 30 carbon atoms.

9 . The organic light emitting display device of claim 8 , wherein Ar includes one among the following compounds:

10 . The organic light emitting display device of claim 8 , wherein R 1 and R 2 include independently one among the following structures:

11 . The organic light emitting display device of claim 8 , wherein the compound represented by Chemical Formula 1 includes one among the following compounds:

12 . The organic light emitting display device of claim 1 , wherein the charge generation compound is represented by the following Chemical Formula 2:

wherein X includes a substituted or unsubstituted naphthyl group, Y includes a substituted or unsubstituted aryl group with at least three or more ring structures, Z includes a phenyl group that is substituted or unsubstituted by an alkyl group, an aryl group, or a heteroaryl group, and o is 0 or 1.

13 . The organic light emitting display device of claim 12 , wherein X includes one among the following compounds:

14 . The organic light emitting display device of claim 12 , wherein Y includes one among the following compounds:

15 . The organic light emitting display device of claim 12 , wherein the charge generation compound represented by Chemical Formula 2 is one among the following compounds:

Assignees

• Lg Display Co Ltd

Inventors

• Kim Dohan
• Joo Sunghoon
• Kim Jungkeun
• Kim Byungsoo
• Park Eunjung
• Kim Hyoseok
• Yoo Seonkeun
• Seok Hanbyeol
• Yoon Seunghee

Classifications

• H01L51/0058

  Electricity · mapped topic

• H01L51/5028

  Electricity · mapped topic

• H01L51/0072 Primary

  Electricity · mapped topic

• H01L51/0054

  Electricity · mapped topic

• H01L51/0067

  Electricity · mapped topic