BATTERY AND SOLAR METHOD FOR MANUFACTURING THE SAME

• US 20120199191A1
• Filed: 11/01/2010
• Published: 08/09/2012
• Est. Priority Date: 10/30/2009
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Lim, Chin Woo
• Granted Patent: US 9,171,979 B2
• Time in Patent Office: Days
• US Class Current: 136/256
• CPC Class Codes: H01L 31/03923 including AIBIIICVI compound materials, e.g. CIS, CIGS
• CPC Class Codes: H01L 31/03928 including AIBIIICVI compound, e.g. CIS, CIGS deposited on metal or polymer foils
• CPC Class Codes: H01L 31/046 PV modules composed of a plurality of thin film solar cells deposited on the same substrate
• CPC Class Codes: Y02E 10/541 CuInSe2 material PV cells
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A solar battery according to the embodiment of the present invention includes an rear electrode formed on a substrate and separated by an first through-hole; an light absorbing layer formed on the rear electrode including the first through-hole; a second through-hole exposing the rear electrode through the light absorbing layer; a buffer layer formed on the upper surface and the side surface of the light absorbing layer; a front electrode layer formed on the buffer layer; and a connection wiring extending from the front electrode layer and formed within the second through-hole.

Claims

1. A solar battery comprising;

a rear electrode formed on a substrate and separated by an first through-hole;

a light absorbing layer formed on the rear electrode including the first through-hole;

a second through-hole exposing the rear electrode through the light absorbing layer;

a buffer layer formed on the upper surface and the side surface of the light absorbing layer;

a front electrode layer formed on the buffer layer; and

a connection wiring extending from the front electrode layer and formed within the second through-hole.

2. The solar battery of claim 1, wherein,

further includes a conductive adhesive layer formed on the rear electrode.

3. The solar battery of claim 1, wherein

the substrate includes a flexible substrate or a rigid substrate.

4. The solar battery of claim 1, wherein

the substrate includes the polymer substrate or a stainless substrate

5. The solar battery of claim 1, wherein

further includes an high-resistance buffer layer formed on the surface of the buffer layer.

6. The solar battery of claim 2, wherein

The resistivity of the conductive bonding layer is 1×

10-5˜

10×

10-5 Ω

cm.

7. The solar battery of claim 1, wherein

The first through-hole and the second through-hole is formed at intervals of 60 to 100 μ

m.

8. The solar battery of claim 2, wherein

the conductive adhesive layer have a thickness 0.5 to 2 μ

m.

9. A method for manufacturing a solar battery comprising;

forming a rear electrode layer on a support substrate and forming a first through-hole to separate the rear electrode each other;

forming an light absorbing layer on a carrier substrate;

forming an second through-hole passing through the light absorbing layer to have the position adjacent to a first through-hole;

bonding the support substrate and the carrier substrate to form the light absorbing layer on the rear electrode layer;

removing the carrier substrate to expose the light absorbing layer;

forming a buffer layer on the light absorbing layer;

forming an front electrode layer on the buffer layer and forming connection wiring within a second through-hole.

10. The method for manufacturing a solar battery of claim 9, wherein,

forming the conductive bonding layer on the rear electrode layer of the support substrate.

11. The method for manufacturing a solar battery of claim 10, wherein

The conductive bonding layer forms a mixture of metal power and resin as carbon, aluminum, tungsten and the like and a resistivity of a conductive bonding layer is 1×

10-5˜

10×

10-5 Ω

cm.

12. The method for manufacturing a solar battery of claim 10, wherein

the support substrate is formed as a flexible substrate of a polymer or stainless series,

the carrier substrate is formed as a rigid substrate of soda lime glass, non-alkali glass and low alkali glass.

13. The method for manufacturing a solar battery of claim 9, wherein

forming a sub-electrode layer including molybdenum prior to forming the light absorbing layer on the carrier substrate.

14. The method for manufacturing a solar battery of claim 9, wherein

the buffer layer is formed as a plurality of layers.

15. The method for manufacturing a solar battery of claim 14, wherein

the plurality of buffer layers are formed to have a different value in each resistance if the buffer layer is formed as the plurality layers.

16. The method for manufacturing a solar battery of claim 9, wherein

forming a third through-hole passing through the rear electrode layer, the buffer layer and the light absorbing layer.

17. The method for manufacturing a solar battery of claim 16, wherein

the gap between the first and the second through-hole and the gap between the second through-hole and the third through-hole are formed at an internal of 60 to 100 μ

m

18. The method for manufacturing a solar battery of claim 9, wherein

the carrier substrate is formed as 3 to 10 times the thickness of the support substrate.