Solar cell structure for wireless charging

• US 10,249,778 B2
• Filed: 12/30/2015
• Issued: 04/02/2019
• Est. Priority Date: 12/04/2015
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Hsu, Hung-Ru, Chang, Li-Chih, Hsieh, Tung-Po, Lai, Yeong-Lin, Lee, Ang-Lun
• Primary Examiner(s): Kang, Tae-Sik
• Application Number:
  US14/985,364
• Publication Number:
  US 20170162735A1
• Time in Patent Office: 1,189 Days
• CPC Class Codes: H01L 31/022425 for solar cells
• CPC Class Codes: H01L 31/022433 Particular geometry of the grid contacts
• CPC Class Codes: H01L 31/022441 Electrode arrangements specially adapted for back-contact solar cells
• CPC Class Codes: H01L 31/022475 composed of indium tin oxide [ITO]
• CPC Class Codes: H01L 31/022483 composed of zinc oxide [ZnO]
• CPC Class Codes: H01L 31/0465 comprising particular structures for the electrical interconnection of adjacent PV cells in the module H01L31/0463 takes precedence
• CPC Class Codes: H01L 31/048 Encapsulation of modules
• CPC Class Codes: H01L 31/053 Energy storage means directly associated or integrated with the PV cell, e.g. a capacitor integrated with a PV cell energy storage means associated with the PV module H02S40/38
• CPC Class Codes: H01L 31/0749 including a AIBIIICVI compound, e.g. CdS/CulnSe2 [CIS] heterojunction solar cells
• CPC Class Codes: H02J 50/00 Circuit arrangements or systems for wireless supply or distribution of electric power
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 7/35 with light sensitive cells
• CPC Class Codes: H02S 10/10 including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems combinations with gas-turbine plants F02C6/00
• CPC Class Codes: Y02E 10/541 CuInSe2 material PV cells
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

A solar cell structure for wireless charging includes a substrate and at least one thin film solar cell disposed on a surface of the substrate, wherein the thin film solar cell has a winding coil structure. Accordingly, in the thin film solar cell, the electrode which is the winding coil structure may be used as electromagnetic induction coil or millimeter-wave radio wave receiving radiator.

Claims

1. A solar cell structure for wireless charging, comprising:

a plane substrate; and

at least one thin film solar cell, disposed on a first surface of the plane substrate, wherein the at least one thin film solar cell has a first winding coil structure with two ends and having a central axis, the at least one thin film solar cell comprises;

a back electrode, formed on the plane substrate;

a light absorption layer, formed on the back electrode; and

a transparent electrode layer, formed on the light absorption layer, wherein the back electrode, the light absorption layer, and the transparent electrode layer are the first winding coil structure, and the central axis of the first winding coil structure is perpendicular to the first surface of the plane substrate.

2. The solar cell structure for wireless charging of claim 1, wherein a number of the at least one thin film solar cell is two, and the solar cell structure further comprises an electrical signal connecting part between electrodes of the two thin film solar cells.

3. The solar cell structure for wireless charging of claim 1, wherein a number of the at least one thin film solar cell is three, and the solar cell structure further comprises an electrical signal connecting part between electrodes of the two adjacent thin film solar cells.

4. The solar cell structure for wireless charging of claim 1, further comprising an energy storage device connected to electrodes of the at least one thin film solar cell for energy storage.

5. The solar cell structure for wireless charging of claim 1, further comprising a second winding coil structure disposed on a second surface of the plane substrate.

6. The solar cell structure for wireless charging of claim 5, further comprising an inductor-capacitor (LC) matching circuit connected to the second winding coil structure.

7. The solar cell structure for wireless charging of claim 1, further comprising an encapsulation layer covering the at least one thin film solar cell, and a second winding coil structure is disposed on the encapsulation layer.

8. The solar cell structure for wireless charging of claim 1, wherein the plane substrate comprises glass substrate, flexible substrate, dielectric substrate, or metal substrate.

9. The solar cell structure for wireless charging of claim 1, wherein the back electrode comprises molybdenum, copper, aluminum, indium tin oxide (ITO), aluminum zinc oxide (AZO), or fluorine tin oxide (FTO).

10. The solar cell structure for wireless charging of claim 1, wherein the at least one thin film solar cell comprises CIGS thin film solar cell, CdTe thin film solar cell, silicon thin film solar cell, perovskite thin-film solar cell, or dye-sensitized solar cell.

11. The solar cell structure for wireless charging of claim 1, wherein the transparent electrode layer comprises aluminum zinc oxide (AZO), indium tin oxide (ITO), or fluorine tin oxide (FTO).

12. The solar cell structure for wireless charging of claim 1, wherein the at least one thin film solar cell further comprises a buffer layer located between the light absorption layer and the transparent electrode layer, and the buffer layer serves as a n-type layer.

13. The solar cell structure for wireless charging of claim 12, wherein a material of the buffer layer comprises CdS, amorphous silicon (a-Si) a-Si, TiO₂, ZnS, ZnO, MgZnO or In₂S₃.

14. The solar cell structure for wireless charging of claim 1, wherein the at least one thin film solar cell further comprises a metal conductive line disposed on the transparent electrode layer.

15. The solar cell structure for wireless charging of claim 7, further comprising an inductor-capacitor (LC) matching circuit connected to the second winding coil structure.