Solar cell module

• US 20060107991A1
• Filed: 11/22/2005
• Published: 05/25/2006
• Est. Priority Date: 11/24/2004
• Status: Abandoned Application

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Baba, Toshiaki
• Application Number:
  US11/283,972
• Publication Number:
  US 20060107991A1
• Time in Patent Office: Days
• US Class Current: 136/244
• CPC Class Codes: H01L 31/0547 comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
• CPC Class Codes: Y02E 10/52 PV systems with concentrators

Abstract

A solar cell module capable of suppressing reduction of output characteristics by suppressing reduction of the quantity of light incident upon solar cells is provided. This solar cell module comprises a light reflective member, arranged on a region of a surface of a first translucent member opposite to an incidence side corresponding to a space between solar cells, having a corrugated light reflective surface on a side closer to the first translucent member. A second translucent member having a refractive index higher than that of the first translucent member is embedded in at least recess portions of the corrugated light reflective surface of the light reflective member.

Claims

1. A solar cell module comprising:

a first translucent member;

a plurality of solar cells arranged on a surface of said first translucent member opposite to an incidence side at a prescribed interval; and

a light reflective member, arranged on a region of said surface of said first translucent member opposite to said incidence side corresponding to the space between said solar cells, having a corrugated light reflective surface on a side closer to said first translucent member, wherein

a second translucent member having a refractive index higher than the refractive index of said first translucent member is embedded in at least recess portions of said corrugated light reflective surface of said light reflective member.

2. The solar cell module according to claim 1, wherein

said first translucent member includes at least either a glass plate or an ethylene vinyl acetate layer.

3. The solar cell module according to claim 2, wherein

said first translucent member includes both of said glass plate and said ethylene vinyl acetate layer.

4. The solar cell module according to claim 2, wherein

said second translucent member is composed of at least one material selected from a group consisting of polycarbonate, polystyrene, polyphenyl methacrylate, polydiallyl phthalate, polypentachlorophenyl methacrylate, poly-o-chlorostyrene, polyvinyl naphthalene and polyvinyl carbazole.

5. The solar cell module according to claim 4, wherein

said second translucent member is composed of polycarbonate.

6. The solar cell module according to claim 1, wherein

said first translucent member includes either a glass plate or an ethylene vinyl acetate layer having a refractive index of about 1.5, and

said second translucent member has a refractive index higher than about 1.5 and not more than about 1.7.

7. The solar cell module according to claim 1, wherein

said corrugated light reflective surface of said light reflective member is formed to be inclined by a prescribed angle with respect to a direction parallel to said surface of said first translucent member and to extend in a direction substantially perpendicular to the direction of arrangement of said plurality of solar cells arranged at said prescribed interval.

8. The solar cell module according to claim 1, wherein

each said solar cell has a plurality of slender finger electrodes arranged at a prescribed interval, and

said plurality of slender finger electrodes are arranged to extend in a direction substantially parallel to the traveling direction of light reflected by said corrugated light reflective surface of said light reflective member.

9. The solar cell module according to claim 1, wherein

said second translucent member is embedded in said recess portions of said corrugated light reflective surface of said light reflective member and formed to cover projecting portions of said corrugated light reflective surface of said light reflective member, and

a surface of said second translucent member opposite to said light reflective member is substantially flat.

10. The solar cell module according to claim 9, wherein

said first translucent member includes a face-side member and a bonding member for bonding said face-side member and said second translucent member to each other,

said face-side member and said bonding member have substantially identical refractive indices, and

said substantially flat surface of said second translucent member is bonded to said face-side member through said bonding member.

11. The solar cell module according to claim 1, wherein

a surface of said second translucent member opposite to said light reflective member is in the form of a projecting arc.

12. The solar cell module according to claim 11, wherein

said first translucent member includes a face-side member and a bonding member for bonding said face-side member and said second translucent member to each other,

said face-side member and said bonding member have substantially identical refractive indices, and

said surface of said second translucent member in the form of a projecting arc is bonded to said face-side member through said bonding member.

13. The solar cell module according to claim 12, wherein

said face-side member includes a glass plate, and

said bonding member includes an ethylene vinyl acetate layer.

14. The solar cell module according to claim 12, wherein

said bonding member also has a function of bonding said face-side member and said solar cells to each other.

15. The solar cell module according to claim 1, wherein

said second translucent member includes a plurality of second translucent members embedded in respective said recess portions of said corrugated light reflective surface of said light reflective member.

16. The solar cell module according to claim 15, wherein

a surface of each said second translucent member opposite to said light reflecting member is in the form of a projecting arc.

17. The solar cell module according to claim 1, wherein

a surface of said second translucent member opposite to said first translucent member is corrugated, and

a metal layer constituting said light reflective member is formed on said corrugated surface of said second translucent member.

18. The solar cell module according to claim 17, wherein

said metal layer constituting said light reflective member is formed to have a corrugated shape reflecting said corrugated surface of said second translucent member.