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Solar cell and solar cell manufacturing method

A technology of solar cells and electrodes, applied in the field of solar cells, can solve the problems of reducing the efficiency of solar cells and increasing the area, and achieve the effects of low cost, small shading and high efficiency

Inactive Publication Date: 2008-05-21
SHIN-ETSU HANDOTAI CO LTD +1
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  • Abstract
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Problems solved by technology

[0007] However, in this method, the efficiency of the solar cell is lowered due to the increased area of ​​the bus bar electrode shielding sunlight

Method used

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  • Solar cell and solar cell manufacturing method
  • Solar cell and solar cell manufacturing method

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Embodiment Construction

[0032] Since the bus bar electrode will become a shield when sunlight is incident on the substrate, it is necessary to narrow the electrode width, but narrowing the electrode width will reduce the contact area between the bus bar electrode and the connector, and the adhesion strength will decrease. Solder mounted connectors will help with the peeling issue.

[0033] Therefore, after in-depth research, the present inventors have found that: if it is a solar cell, it includes a semiconductor substrate formed with a PN junction, a comb-shaped finger electrode formed on at least one side of the semiconductor substrate, and The bus bar electrode connected to the finger electrode on the substrate, wherein the bus bar electrode is made to have a concave-convex pattern (pattern) formed on its surface, thereby obtaining a solar cell, wherein the connector soldered to the bus bar electrode It is difficult to peel off, and the solar shading caused by the bus bar electrode is small, and t...

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Abstract

A solar cell is provided with at least a semiconductor substrate (5) wherein a PN junction is formed; a finger electrode (4) formed in comb-teeth shape at least on one plane of the semiconductor substrate (5); and a bus bar electrode (3) connected to the finger electrode (4) on the semiconductor substrate (5). The solar cell is characterized in that the bus bar electrode (3) has an uneven pattern (1) on the surface. Thus, the low cost and highly efficient solar cell wherein a connector soldered to the bus bar electrode is not easily peeled and less solar light is blocked by the bus bar electrode, and a solar cell manufacturing method are provided.

Description

technical field [0001] The invention relates to a solar cell, which comprises a semiconductor substrate formed with a PN junction, a comb-shaped finger electrode formed on at least one side of the semiconductor substrate, and a bus connected to the finger electrode on the semiconductor substrate A strip electrode, in particular, relates to a high-efficiency solar cell with a mounted connector that is difficult to peel off and with little sunlight shading. Background technique [0002] In a general solar cell, comb-tooth-shaped finger electrodes for extracting power from the semiconductor substrate and bus bar electrodes connected to the finger electrodes for extracting power are formed on the light-receiving surface of the semiconductor substrate on which the PN junction is formed. [0003] On the bus bar electrodes, for example, for connecting individual solar cells, connectors are provided via solder. [0004] Since the bus bar electrodes will cast shadows when sunlight i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/042
CPCH01L31/022433Y02E10/50H01L31/04H01L31/0224H01L31/0236H01L31/18
Inventor 生岛聪之石川直挥
Owner SHIN-ETSU HANDOTAI CO LTD
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