METHOD FOR MANUFACTURING ORGANIC SOLAR CELL AND ORGANIC SOLAR CELL MANUFACTURED USING SAME

• US 20200135946A1
• Filed: 04/27/2018
• Published: 04/30/2020
• Est. Priority Date: 05/02/2017
• Status: Active Grant

• Current Assignee: LG Chem Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: CHOI, DOOWHAN, LEE, JIYOUNG, JANG, SONGRIM, KIM, YOUNSHIN
• Granted Patent: US 11,171,289 B2
• Time in Patent Office: Days
• CPC Class Codes: H10K 30/211 comprising multiple junctions, e.g. double heterojunctions
• CPC Class Codes: H10K 71/40 Thermal treatment, e.g. annealing in the presence of a solvent vapour
• CPC Class Codes: H10K 71/811 Controlling the atmosphere during processing H10K71/40 takes precedence
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

Provided is a disclosure relating to a method for manufacturing an organic solar cell comprising providing a substrate; forming a first electrode on the substrate; forming a photoactive layer by coating a solution comprising a photoactive material and a solvent on the first electrode; drying the photoactive layer in a closed drying system having a constant volume; and forming a second electrode on the photoactive layer, and an organic solar cell manufactured using the same.

Claims

1. A method for manufacturing an organic solar cell, the method comprising:

providing a substrate;

forming a first electrode on the substrate;

forming a photoactive layer by coating a solution including a photoactive material and a solvent on the first electrode;

drying the photoactive layer in a closed drying system having a constant volume; and

forming a second electrode on the photoactive layer.

2. The method for manufacturing the organic solar cell of claim 1, wherein a ratio of a volume of the solution coated on the first electrode to the volume of the drying system is from 1:

1,000 to 1;

5,000.

3. The method for manufacturing the organic solar cell of claim 1, wherein a volume of the solution coated on the first electrode is greater than or equal to 0.1 μ

l/cm² and less than or equal to 10 μ

l/cm² based on an area of the substrate.

4. The method for manufacturing the organic solar cell of claim 1, wherein drying the photoactive layer is performed at a temperature in a range of from 30°

C. and to 150°

C.

5. The method for manufacturing the organic solar cell of claim 1, wherein drying the photoactive layer is performed for from 5 minutes to 30 minutes.

6. The method for manufacturing the organic solar cell of claim 1, wherein the drying system includes an inert gas.

7. The method for manufacturing the organic solar cell of claim 6, wherein the inert gas is argon (Ar) or nitrogen (N₂).

8. The method for manufacturing the organic solar cell of claim 1, wherein the drying system has a relative humidity at 60°

C. of 30% or less.

9. The method for manufacturing the organic solar cell of claim 1, wherein coating the solution is performed using any one selected from the group consisting of dip coating, screen printing, spray coating, slot die, bar coater, doctor blade and brush painting.

10. The method for manufacturing the organic solar cell of claim 1, wherein the photoactive material is included in an amount of greater than or equal to 0.5% by weight and less than or equal to 10% by weight of the solution.

11. The method for manufacturing the organic solar cell of claim 1, wherein the solvent is one selected from the group consisting of chloroform, chlorobenzene, orthodichlorobenzene, xylene, toluene, cyclohexane and 2-methylanisole, or a mixed solvent of 2 or more thereof.

12. The method for manufacturing the organic solar cell of claim 1, wherein the solution includes one, two or more additives selected from the group consisting of 1,8-diiodooctane (DIO), octanedithiol, diphenyl ether, trichlorobenzene and 1-chloronaphthalene.

13. An organic solar cell manufactured using the method for manufacturing the organic solar cell of claim 1.

14. The organic solar cell of claim 13, wherein the organic solar cell has an energy conversion efficiency of 6% or greater.

15. The method for manufacturing the organic solar cell of claim 1, wherein air outside of the drying system is not supplied into the drying system while drying the photoactive layer.

16. The method for manufacturing the organic solar cell of claim 15, wherein gas inside of the drying system does not exhaust to the outside of the drying system while drying the photoactive layer.