SOLAR CELL MODULE, SOLAR CELL AND SOLAR CELL MODULE MANUFACTURING METHOD

• US 20110277817A1
• Filed: 06/29/2009
• Published: 11/17/2011
• Est. Priority Date: 08/22/2008
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Sakata, Hitoshi, Ide, Daisuke
• Granted Patent: US 9,252,299 B2
• Time in Patent Office: Days
• US Class Current: 136/246
• CPC Class Codes: H01L 31/022441 Electrode arrangements specially adapted for back-contact solar cells
• CPC Class Codes: H01L 31/048 Encapsulation of modules
• CPC Class Codes: H01L 31/0516 specially adapted for interconnection of back-contact solar cells
• 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 100 comprises a light reflection member 12 placed on the light receiving surface of a n-type semiconductor substrate 11 and having a light reflecting surface 12A facing the light receiving surface protection member 2. The light reflection member 12 is positioned on an opposite side to the n-side connecting electrode 14n across the n-type semiconductor substrate 11.

Claims

1. A solar cell module comprising one solar cell sealed between a light receiving surface protection member and a back surface protection member, wherein,

the one solar cell comprises:

a semiconductor substrate of a first conductivity type having a light receiving surface and a back surface provided on an opposite side to the light receiving surface;

a first conductivity side connecting electrode formed on the back surface and connected to a plurality of first conductivity side fine-line electrodes;

a second conductivity side connecting electrode formed on the back surface and connected to a plurality of second conductivity side fine-line electrodes; and

a light reflection member placed on the light receiving surface and having a light reflecting surface facing the light receiving surface protection member, and

in the one solar cell, the light reflection member is positioned on an opposite side to the first conductivity side connecting electrode across the semiconductor substrate.

2. The solar cell module according to claim 1, wherein the first conductivity side connecting electrode is formed on one end portion of the semiconductor substrate, and

the light reflection member reflects incident light falling on the light reflection member toward another end portion of the semiconductor substrate.

3. The solar cell module according to claim 1, comprising another solar cell sealed between the light receiving surface protection member and the back surface protection member, wherein

the other solar cell comprises:

a semiconductor substrate of a first conductivity type having a light receiving surface and a back surface provided on an opposite side to the light receiving surface;

a first conductivity side connecting electrode formed on the back surface and connected to a plurality of first conductivity side fine-line electrodes;

a second conductivity side connecting electrode formed on the back surface and connected to a plurality of second conductivity side fine-line electrodes; and

a light reflection member placed on the light receiving surface and having a light reflecting surface facing the light receiving surface protection member,

in the other solar cell, the light reflection member is positioned on an opposite side to the first conductivity side connecting electrode across the semiconductor substrate, and

the light reflection member included in the one solar cell and the light reflection member included in the other solar cell are formed integrally as a single unit.

4. The solar cell module according to claim 1, wherein the light reflecting surface is made of any one of a metal layer and a white resin.

5. The solar cell module according to claim 1, wherein the light reflection member includes a base bonded to the light receiving surface.

6. A solar cell comprising:

a semiconductor substrate of a first conductivity type having a light receiving surface and a back surface provided on an opposite side to the light receiving surface;

a first conductivity side connecting electrode formed on the back surface and connected to a plurality of first conductivity side fine-line electrodes;

a second conductivity side connecting electrode formed on the back surface and connected to a plurality of second conductivity side fine-line electrodes; and

a light reflection member placed on the light receiving surface, and having light reflecting surface facing the light receiving surface protection member, wherein

the light reflection member is positioned on an opposite side to the first conductivity side connecting electrode across the semiconductor substrate.

7. The solar cell according to claim 6, wherein the light reflecting surface is made of any one of a metal layer and a white resin.

8. The solar cell according to claim 6, wherein the light reflection member includes a base bonded to the light receiving surface.

9. A method of manufacturing a solar cell module including one solar cell and another solar cell sealed between a light receiving surface protection member and a back surface protection member, the method comprising:

a step A of forming each of the one solar cell and the other solar cell by preparing a semiconductor substrate of a first conductivity type having a back surface which is provided on an opposite side to a light receiving surface and has a first conductivity side connecting electrode and a second conductivity side connecting electrode formed thereon, with the first conductivity side connecting electrode connected to a plurality of first conductivity side fine-line electrodes, and the second conductivity side connecting electrode connected to a plurality of second conductivity side fine-line electrodes formed on the back surface, and by arranging a light reflection member on the light receiving surface of the semiconductor substrate;

a step B of forming a solar cell string by electrically connecting the first conductivity side connecting electrode of the one solar cell and the second conductivity side connecting electrode of the other solar cell by use of a wiring member; and

a step C of stacking a first sealing member, the solar cell string, a second sealing member and the back surface protection member in this order on the light receiving surface protection member, wherein

in the step A, the light reflection member is arranged on an opposite side to the first conductivity side connecting electrode across the semiconductor substrate, and

in the step B and the step C, the one solar cell and the other solar cell are placed so that the light receiving surfaces thereof face downward.