DISPLAY COMPONENT AND MANUFACTURING METHOD THEREFOR

• US 20180130853A1
• Filed: 12/11/2015
• Published: 05/10/2018
• Est. Priority Date: 12/11/2014
• Status: Abandoned Application

• Current Assignee: Guangzhou ChinaRay Optoelectronic Materials Co.,Ltd. (TCL Technology Group Corp.)
• Original Assignee: Guanzhou Chinaray Optoelectronic Materials Limited
• Inventors: PAN, Junyou
• Application Number:
  US15/535,022
• Publication Number:
  US 20180130853A1
• Time in Patent Office: Days
• CPC Class Codes: H10K 50/115 comprising active inorganic nanostructures, e.g. luminescent quantum dots
• CPC Class Codes: H10K 50/15 Hole transporting layers
• CPC Class Codes: H10K 50/17 Carrier injection layers
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/13 using printing techniques, e.g. ink-jet printing or screen printing
• CPC Class Codes: H10K 71/135 using ink-jet printing
• CPC Class Codes: H10K 85/1135 Polyethylene dioxythiophene [PEDOT]; Derivatives thereof
• CPC Class Codes: H10K 85/115 Polyfluorene; Derivatives thereof
• CPC Class Codes: H10K 85/151 Copolymers
• CPC Class Codes: H10K 85/342 comprising iridium
• 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

A display device and a preparation method thereof are disclosed, The display device comprises red, green and blue sub-pixels, wherein each sub-pixel is an electroluminescent device and comprises a light-emitting layer, wherein 1) the light-emitting layer of the green sub-pixel contains organic light-emitting material, 2) either or both of the light-emitting layers of the red and blue sub-pixels contain colloidal quantum dot light-emitting material, 3) the light-emitting layer of red, green and blue sub-pixels are all prepared by printing.

Claims

1-14. -14. (canceled)

15. A display device comprising red, green and blue sub-pixels, wherein each sub-pixel is an electroluminescent device and includes a light-emitting layer, wherein:

1) the light-emitting layer of the green sub-pixel contains organic light-emitting material,

2) either or both of the light-emitting layers of the red and blue sub-pixels contain colloidal quantum dot light-emitting material, and

3) the light-emitting layers of the red, green and blue sub-pixels are all prepared by printing.

16. The display device of claim 15, wherein the light emitting layer of the green sub-pixel is prepared by inkjet printing, nozzle printing or gravure printing.

17. The display device of claim 15, wherein either or both of the light-emitting layers of the red and blue sub-pixels comprise colloidal quantum dot light-emitting material, wherein the light emitting layer containing the quantum dots is prepared by ink jet printing, nano imprinting, or gravure printing.

18. The display device of claim 15, wherein the red, green and blue sub-pixels each comprises a hole injection layer and/or a hole transport layer.

19. The display device of claim 18, wherein the red, green and blue sub-pixels each comprises an identical hole injection layer and/or an identical hole transport layer, wherein the hole injection layer and/or the hole transport layer is prepared by printing, and the printing method is selected from ink-jet printing, screen printing, gravure printing, spray printing, and slot-die coating.

20. The display device of claim 18, wherein the red, green and blue sub-pixels each includes an identical hole-injecting layer comprising a material selected from the group consisting of NiOx, WOx, MoOx, RuOx, VOx and any combination thereof, or a conductive polymer.

21. The display device of claim 15, wherein the red, green and blue sub-pixels each comprises_an electron injection layer and/or an electron transport layer.

22. The display device of claim 15, wherein the organic light-emitting material is selected from the group consisting of organic small molecules, polymers and organic metal complexes.

23. The display device of claim 15, wherein the colloidal quantum dot light-emitting material comprises i semiconductor material selected from the group consisting of CdSe, Cds, CdTe, ZnO, ZnSe, ZnS, ZnTe, HgS, HgSe, HgTe, CdZnSe, InAs, InP, InN, GaN, InSb, InAsP, InGaAs, GaAs, GaP, GaSb, AlP, AlN, AlAs, AlSb, CdSeTe, ZnCdSe, PbSe, PbTe, PbS, PbSnTe, Tl₂SnTe₅, and any combination thereof.

24. The display device of claim 15, wherein the colloidal quantum dot light-etnitting material has a heterostructure comprising two different semiconductors, wherein the heterostructure is a core/shell structure having at least one shell.

25. The display device of claim 15, wherein each sub-pixel comprises at least one thin film transistor (TFT).

26. The display device of claim 25, wherein the TFT is selected from the group consisting of LTPS-TFT, HTPS-TFT, a-Si-TFT, metal oxide TFT, organic transistor (OFET), and carbon nanotube transistor (CNT FET).

27. A method for preparing a display device;

comprising the following operations;

1) depositing a patterned anode on a substrate;

2) depositing a hole injection layer on the anode;

3) depositing a hole transport layer on the hole injection layer;

4) preparing red, green and blue light emitting layers on hole transport layer of the subpixel by printing; and

5) depositing an electron transport layer on the light emitting layer.

28. The method of claim 27, wherein the deposition in each of operations 2) and 3) is achieved by printing.