Silane compound, organic electroluminescent device and display panel using the same

• US 20060181200A1
• Filed: 08/09/2005
• Published: 08/17/2006
• Est. Priority Date: 02/16/2005
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Hung, Min-Ling
• Application Number:
  US11/199,144
• Publication Number:
  US 20060181200A1
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: C07F 7/10 containing nitrogen having a Si-N linkage
• CPC Class Codes: H10K 50/14 Carrier transporting layers
• CPC Class Codes: H10K 50/155 comprising dopants
• CPC Class Codes: H10K 50/165 comprising dopants
• CPC Class Codes: H10K 85/40 Organosilicon compounds, e.g. TIPS pentacene
• CPC Class Codes: H10K 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole

Abstract

An organic electroluminescent device (OELD) using at least one silane compound is applied to a display panel. The OELD at least comprises an anode; a hole transport layer formed on the anode; a light emitting layer formed on the hole transport layer; an electron transport layer formed on the light emitting layer, and a cathode formed on the electron transport layer. The electron transport layer substantially includes a silane compound represented by a general formula:

• • wherein A¹.A².A³ and A⁴, which may be the same or different, each represents an alkyl group, an aryl group, a heteroaryl group or an alkynyl group.

Claims

1. A silane compound of formula (I):

wherein R¹ and R² are each independently selected from a substituent group or a hydrogen atom, m and n are integers and satisfy the relationship of m+n=4, and A is selected from an alkyl group, an aryl group, a heteroaryl group, or an alkynyl group.

2. An organic electroluminescence device (OELD), comprising:

an anode;

a hole transport layer formed over the anode;

an organic light emitting layer formed over the hole transport layer;

an electron transport layer formed above the organic light emitting layer, the electron transport layer including a silane compound represented by the general formula;

wherein A¹, A², A³ and A⁴ are each independently selected from an alkyl group, an aryl group, a heteroaryl group, or an alkynyl group; and

a cathode formed over the electron transport layer.

3. The OELD according to claim 2, wherein the silane compound is a compound represented by the general formula:

wherein R¹ and R² are each independently selected from a substituent group or a hydrogen atom;

m and n are integers and satisfy the relationship of m+n=4.

4. The OELD according to claim 3, wherein A is selected from an alkyl group, an aryl group, a heteroaryl group, or an alkynyl group.

5. The OELD according to claim 2, wherein the electron transport layer further includes an n-type material.

6. The OELD according to claim 3, wherein the n-type material comprises a metal oxide or an organic metallic salt.

7. The OELD according to claim 4, wherein a cation of the metal oxide includes lithium ion (Li⁺), sodium ion (Na⁺), potassium ion (K⁺), cesium ion (Cs⁺), magnesium ion (Mg²⁺), calcium ion (Ca²⁺) or barium ion (Ba²⁺);

an anion of the metal oxide includes oxygen ion (O²⁻

), fluorine ion (F⁻

), chlorine ion (Cl⁻

), bromine ion (Br⁻

), iodine ion (I⁻

), carbonate ion (CO₃²⁻

), nitrate ion (NO₃⁻

), or acetate ion (CH₃COO⁻

).

8. The OELD according to claim 4, wherein a cation of the organic metallic salt includes lithium ion (Li⁺), sodium ion (Na⁺), potassium ion (K⁺), cesium ion (Cs⁺), magnesium ion (Mg²⁺), calcium ion (Ca²⁺), or barium ion (Ba²⁺);

and an anion of the organic metallic salt includes an organic anion of the aliphatic group or the aromatic group having carbon atoms equal to or less than 30.

9. The OELD according to claim 2, wherein the silane compound is dicarbazolyldiphenyl silane (TH-4) represented by the general formula:

10. The OELD according to claim 2, wherein a thickness of the electron transport layer ranges from about 100 Å

to about 500 Å

.

11. The OELD according to claim 10, wherein the thickness of the electron transport layer is about 300 Å

.

12. The OELD according to claim 2, wherein the hole transport layer further includes an amine derivative or an diamine derivative.

13. The OELD according to claim 12, wherein the diamine derivative is N,N-bis-(1-naphthyl)-N,N-diphenyl-1,1-biphenyl-4,4-diamine (NPB), or N′

-diphenyl-N,N′

-bis(3-methylphenyl)(1,1′

-biphenyl)-4,4′

-diamine (TPD).

14. The OELD according to claim 12, wherein the amine derivative is 4,4′

,4″

-tris(2-naphthylphenylamino) triphenyl-amine (2T-NATA).

15. The OELD according to claim 12, wherein a thickness of the hole transport layer ranges from about 50 Å

to about 5000 Å

.

16. The OELD according to claim 2, wherein a thickness of the organic light emitting layer ranges from about 50 Å

to about 5000 Å

.

17. The OELD according to claim 2, further comprising:

a hole injection layer disposed between the anode and the hole transport layer.

18. The OELD according to claim 17, wherein the hole injection layer comprises a porphyrin derivative, a p-doped diamine derivative, or a compound containing fluorine, carbon and hydrogen.

19. The OELD according to claim 18, wherein the porphyrin derivative comprises a metallophthalocyanine derivative.

20. The OELD according to claim 19, wherein the metallophthalocyanine derivative is copper phthalocyanine.

21. The OELD according to claim 2, further comprising:

an electron injection layer disposed between the cathode and the electron transport layer.

22. The OELD according to claim 21, wherein the electron injection layer includes an alkaline metal halide, an alkaline-earth metal halide, an alkaline metal oxide, or a metal carbonate.

23. The OELD according to claim 21, wherein the electron injection layer includes lithium fluoride (LiF), cesium fluoride (CsF), sodium fluoride (NaF), calcium fluorid (CaF₂), lithium oxide (Li₂O), cesium oxide (Cs₂O), sodium oxide (Na₂O), lithium carbonate (Li₂CO₃), cesium carbonate (Cs₂CO₃), or sodium carbonate (Na₂CO₃).

24. The OELD according to claim 21, wherein a thickness of the electron injection layer ranges from about 1 Å

to about 300 Å

.

25. The OELD according to claim 2, wherein the hole transport layer includes the silane compound.

26. An electroluminescent display panel comprising the organic electroluminescent device of claim 2.