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Solar cell, manufacturing method thereof, and solar cell module

A solar cell and electrode technology, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems of solar cell performance degradation and complex solar cell manufacturing methods, and achieve the effect of improving open circuit voltage and fill factor

Active Publication Date: 2022-04-05
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the manufacturing method of the solar cell of the back electrode type is complicated, and the performance of the solar cell may be degraded during the manufacturing of the solar cell, and it is necessary to fully study the structure and manufacturing method of the solar cell.

Method used

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  • Solar cell, manufacturing method thereof, and solar cell module
  • Solar cell, manufacturing method thereof, and solar cell module
  • Solar cell, manufacturing method thereof, and solar cell module

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0107]

[0108] First, as described below, except that no antireflection layer is formed, by Figure 5 The process shown makes figure 2 The back electrode type solar cell shown.

[0109] First, prepare an n-type single-crystal silicon substrate 11 with an incident plane orientation of (100), wash the substrate in acetone, and then immerse it in a 2% by mass hydrofluoric acid aqueous solution for 5 minutes to remove the silicon oxide film on the surface. Rinse twice with ultrapure water. The substrate was immersed in a mixed aqueous solution of 5% by mass KOH / 15% by mass of isopropanol kept at 75° C. for 15 minutes to etch the surface of the substrate to form a texture on the surface of the substrate. Thereafter, it was immersed in a 2% by mass hydrofluoric acid aqueous solution for 5 minutes, washed twice with ultrapure water, and dried at normal temperature. At this stage, the surface of the n-type single crystal silicon substrate was observed using an atomic force micr...

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Abstract

The solar battery unit (10) has a semiconductor substrate (11), a first conductivity type layer (12) and a second conductivity type layer (13) arranged on one main surface of the semiconductor substrate (11), wherein, in the first A first electrode (17) is arranged on the conductive layer (12), a second electrode (18) is arranged on the second conductive layer (13), and the first electrode (17) is electrically separated from the second electrode (18), An island-shaped conductive layer (16) is arranged between the first electrode (17) and the second electrode (18).

Description

technical field [0001] The present invention relates to a solar cell, a method of manufacturing the same, and a solar cell module including the solar cell. Background technique [0002] Solar cells using semiconductor substrates have been widely used as photovoltaic power generation systems due to their high photoelectric conversion efficiency. Furthermore, in order to efficiently extract current, many solar cells in practical use are double-sided electrode type solar cells in which electrodes are formed on the light-receiving surface side for receiving sunlight and the back surface opposite to the light-receiving surface side. More specifically, a double-sided electrode type solar cell has electrodes on both sides of a semiconductor substrate, receives sunlight from the light-receiving side, generates electron-hole pairs inside, and conducts current through the electrodes on both sides. [0003] However, in such a double-sided electrode type solar cell, electrodes are also...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0747H01L31/0224
CPCY02E10/50H01L31/022441H01L31/048H01L31/0747H01L31/0224H01L31/022425H01L31/022466H01L31/1884
Inventor 小西克典中野邦裕河崎勇人吉河训太
Owner KANEKA CORP
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