Organic light emitting diode and organic light emitting display device including the same

Patent metadata

Field	Value
Publication number	US-9960380-B2
Application number	US-201715599263-A
Country	US
Kind code	B2
Filing date	May 18, 2017
Priority date	Dec 24, 2014
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

An organic light emitting diode and an organic light emitting display device, the organic light emitting diode including a first electrode and a second electrode facing each other; an emission layer between the first electrode and the second electrode; and a hole transport layer between the first electrode and the emission layer, wherein the hole transport layer includes an organic material and a dipole material, the dipole material including a first component and a second component, the first component having a polarity different from that of the second component and the first component and the second component being combined with each other.

First claim

What is claimed is:

1. An organic light emitting diode, comprising:
a first electrode and a second electrode facing each other;
an emission layer between the first electrode and the second electrode; and
a hole transfer layer between the first electrode and the emission layer,
wherein the hole transfer layer includes an organic material and an inorganic dipole material, the dipole material including a first component and a second component, the first component having a polarity different from that of the second component and the first component and the second component being combined with each other.

2. The organic light emitting diode as claimed in claim 1 , wherein:
the first component includes a metal or a non-metal and has a work function of 4.0 eV or more, and
the second component includes a halogen.

3. The organic light emitting diode as claimed in claim 2 , wherein the first component includes an element selected from Ag, Au, B, Be, C, Co, Cr, Cu, Fe, Hg, Ir, Mo, Nb, Ni, Os, Pd, Pt, Re, Rh, Ru, Sb, Se, Si, Sn, Ta, Te, Ti, V, W, In, and Zn.

4. The organic light emitting diode as claimed in claim 3 , wherein the second component includes an element selected from F, Cl, Br, and I.

5. The organic light emitting diode as claimed in claim 4 , wherein the dipole material includes one selected from NiI 2 , CoI 2 , CuI, AgI, SnI 2 , and InI 3 .

6. The organic light emitting diode as claimed in claim 2 , further comprising an electron injection layer between the emission layer and the second electrode,
wherein the electron injection layer has a work function of 3.0 eV or less, and includes at least one selected from an alkali metal, an alkaline earth metal, a rare earth element, a transition metal, or an alloy thereof.

7. The organic light emitting diode as claimed in claim 6 , wherein the electron injection layer includes at least one selected from Li, Na, K, Rb, Cs, Ca, Sr, Ba, Ce, Sm, Eu, Gd, Yb, and an alloy thereof.

8. The organic light emitting diode as claimed in claim 1 , wherein a dipole moment of the first component and the second component is 5 Debye or greater.

9. The organic light emitting diode as claimed in claim 8 , wherein:
the first component includes at least one selected from an alkali metal, an alkaline earth metals, a rare earth element, a transition metal, and an alloy thereof, and
the second component includes a halogen.

10. The organic light emitting diode as claimed in claim 9 , wherein the first component has a work function of 3.0 eV or less, and includes at least one selected from Li, Na, K, Rb, Cs, Ca, Sr, Ba, Ce, Sm, Eu, Gd, and Yb, and an alloy thereof.

11. The organic light emitting diode as claimed in claim 1 , wherein the hole transfer layer includes at least one of a hole injection layer and a hole transport layer, the hole injection layer between the first electrode and the hole transport layer.

12. The organic light emitting diode as claimed in claim 1 , wherein:
the hole transfer layer has a structure formed of a plurality of layers and when the organic material and the dipole material each are a first material and a second material, the plurality of layers each comprise at least one of the first material and the second material.

13. The organic light emitting diode as claimed in claim 1 , wherein the hole transfer layer is formed by a co-depositing the organic material and the dipole material.

14. An organic light emitting display device, comprising:
a substrate,
a thin film transistor,
an organic light emitting diode on the thin film transistor,
wherein the organic light emitting diode includes:
a first electrode and a second electrode facing each other;
an emission layer between the first electrode and the second electrode; and
a hole transfer layer between the first electrode and the emission layer, and
wherein:
the hole transfer layer includes an organic material and a dipole material,
the dipole material includes a first component and a second component,
the first component has a polarity different from that of the second component, the first component and the second component being combined with each other,
the emission layer includes a red emitting layer, a green emitting layer, and a blue emitting layer, and
the emission layer further includes an auxiliary layer disposed at a lower end of the blue emitting layer.

15. The organic light emitting display device as claimed in claim 14 , wherein the first component includes a metal or a non-metal, the metal or non-metal having a work function of 4.0 eV or more, and the second component includes halogen.

16. The organic light emitting display device as claimed in claim 15 , wherein the first component includes an element selected from Ag, Au, B, Be, C, Co, Cr, Cu, Fe, Hg, Ir, Mo, Nb, Ni, Os, Pd, Pt, Re, Rh, Ru, Sb, Se, Si, Sn, Ta, Te, Ti, V, W, In, and Zn.

17. The organic light emitting display device as claimed in claim 16 , wherein the second component includes an element selected from F, Cl, Br, and I.

18. The organic light emitting display device as claimed in claim 17 , wherein the dipole material includes one selected from NiI e , CoI 2 , CuI, AgI, SnI 2 , and InI 3 .

19. The organic light emitting display device as claimed in claim 14 , wherein a dipole moment of the first component and the second component is 5 Debye or greater.

20. The organic light emitting display device as claimed in claim 19 , wherein:
the first component includes at least one selected from an alkali metal, an alkaline earth metals, a rare earth element, a transition metal, and an alloy thereof, and
the second component includes a halogen.

21. The organic light emitting display device as claimed in claim 20 , wherein the first component has a work function of 3.0 eV or less, and includes at least one selected from Li, Na, K, Rb, Cs, Ca, Sr, Ba, Ce, Sm, Eu, Gd, and Yb, and an alloy thereof.

22. The organic light emitting display device as claimed in claim 14 , wherein the auxiliary layer includes a compound represented by the following Chemical Formula 1:

wherein, in Chemical Formula 1,
A1, A2, and A3 each independently include an alkyl group, an aryl group, a carbazole group, a dibenzothiophene group, a dibenzofuran group, or a biphenyl group, and
a, b, and c are each independently an integer of 0 to 4.

23. The organic light emitting display device as claimed in claim 14 , wherein the auxiliary layer includes a compound represented by the following Chemical Formula 2:

wherein, in Chemical Formula 2,
a, b, and c are each independently an integer of 0 to 3, and
each X is independently selected from O, N, and S.

24. The organic light emitting display device as claimed in claim 14 , wherein:
the hole transfer layer has a structure formed of a plurality of layers and when the organic material and the dipole material each are a first material and a second material,
the plurality of layers each comprise at least one of the first material and the second material.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Dong Chan
• Kim Won Jong
• Kim Eung Do
• Seo Dong Kyu
• Im Da Hea
• Yim Sang Hoon
• Chu Chang Woong

Classifications

• H01L51/0074

  Electricity · mapped topic

• H01L51/0072

  Electricity · mapped topic

• H01L51/0073

  Electricity · mapped topic

• H01L51/5056

  Electricity · mapped topic

• H01L27/3211

  Electricity · mapped topic