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Method for producing bifacial solar cell and bifacial solar cell

A solar cell, double-sided technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as poor light capture, and achieve the effects of reduced wastewater treatment costs, high efficiency, and reduced costs

Inactive Publication Date: 2018-09-11
INT SOLAR ENERGY RES CENT KONSTANZ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the first has the advantage of good passivation quality, its disadvantages are poor light trapping and challenging contact formation when contacts are formed by common screen printing

Method used

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  • Method for producing bifacial solar cell and bifacial solar cell
  • Method for producing bifacial solar cell and bifacial solar cell

Examples

Experimental program
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Embodiment Construction

[0040] figure 1 A process flow of an embodiment of a manufacturing method is shown. Step 100 includes providing a p-doped or n-doped wafer. Step 200 includes applying an acid treatment to the wafer to remove saw damage and contamination. Step 300 includes forming a first doped region, or forming a dopant-containing layer, on a first side of the wafer for use as figure 1 The source in the later high temperature step is clearly shown in . Step 400 includes applying a dielectric layer or stack of dielectric layers on a first side of a wafer. Step 500 includes preparing the second side of the wafer by alkaline texturing. Step 600 includes forming a second doped region on a second side of the wafer. Step 700 includes coating the second side of the wafer with a dielectric layer or stack of dielectric layers; and step 800 includes providing contacts for the bifacial solar cell (10) by metallization.

[0041] Such as figure 1 As shown in , in this process sequence the effluents...

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Abstract

A method for producing a bifacial solar cell (10) comprising the steps of applying an acidic treatment to both sides of a wafer to remove sawing damage; creating a first doped region on a first side (10b) of the wafer; coating the first side with a dielectric layer; preparing a second side (10a) of the wafer by alkaline texturing; creating a second doped region at the second side; coating the second side with a dielectric layer; and providing the bifacial solar cell with contacts, wherein these steps are executed in the described order. A bifacial solar cell (10), comprising a base (1); a first strongly doped region (3) of p-type or n-type located on a side of the base (1) and arranged on an acidic etched surface (7); a second strongly doped n- or p-type region (2) located on the oppositeside of the base, arranged on a random pyramid textured surface and having a random pyramid structured surface (6); metallic contacts (5, 4) located on the first and second strongly doped regions.

Description

Background technique [0001] A solar cell is a well-known device for converting light into electricity that uses the internal photoeffects of semiconductors and controls the transport of the resulting charge through filter regions, such as p-n transitions, between differently doped semiconductor regions . [0002] In the field of solar cells, many terms used in this description have specific meanings. For example, the side of a solar cell that faces the direct light source during operation of the solar cell is typically defined independently of the current orientation of the solar cell when it is not mounted for operation and is referred to as the "front side" or "upper side." ". Conversely, the opposite side is the "backside" or "lower side" of the solar cell. Furthermore, those skilled in the art of solar cells usually have a per cm in the context of doping 3 is about 10 20 to 10 21 The doping of dopant atoms uses the word "strongly", for example, in the terms "strongly...

Claims

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Application Information

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IPC IPC(8): H01L31/0236H01L31/068
CPCH01L31/02363H01L31/068Y02E10/547
Inventor 皮尔明·普赖斯弗洛里恩·巴克霍尔兹
Owner INT SOLAR ENERGY RES CENT KONSTANZ
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