Method for manufacturing a solar cell

A technology of solar cells and manufacturing methods, applied in the direction of final product manufacturing, sustainable manufacturing/processing, circuits, etc., can solve the problems of inability to form selective emitters, reduce recombination, reduce contact resistance, and improve conversion efficiency Effect

Inactive Publication Date: 2011-10-19
HYUNDAI HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at this time, if thin (fine) linear finger electrodes with a certain width and height or less are formed on the front surface of the wafer, there is a problem that the corresponding selective emitter cannot be formed.

Method used

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  • Method for manufacturing a solar cell
  • Method for manufacturing a solar cell
  • Method for manufacturing a solar cell

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Embodiment approach

[0044] In addition, refer to Image 6 , after forming the shallow junction emitter 300, and using the heavy doping to form the selective emitter 500, remove the remaining PSG due to diffusion, and use the chemical vapor deposition as described above, on the front surface of the wafer 100 , silicon nitride is evaporated on the back surface, and aluminum is printed on the back surface of the wafer 100 .

[0045] Also, silver is printed on the rear surface of the wafer 100 . At this time, the thin line-shaped finger electrodes 700 are formed along a direction connecting the through holes 200 to connect the through holes 200 .

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Abstract

The present invention provides a method for manufacturing a solar cell. The method for manufacturing a solar cell comprises: forming via holes in a silicon wafer; forming a shallow emitter on the front surface and the rear surface of the wafer, connecting the inner walls of the via holes and the via holes; and selectively forming an emitter through the heavy doping of a dopant to provide a plurality of regions along a direction linking the via holes of the shallow emitter with a certain concentration or higher. Accordingly, the present invention can selectively form an emitter on an MWT solar cell by performing laser doping or etching on a region contacting a front surface electrode having a certain width and height.

Description

technical field [0001] The present invention relates to a method for manufacturing a solar cell, in particular to a method for forming a selective solar cell by performing laser doping or etching on a region of a metal-plated perforated wound solar cell that is in contact with a front surface electrode having a certain width and height. A method of manufacturing a solar cell with a positive emitter. Background technique [0002] Recently, as people are aware of the depletion of existing energy resources such as oil or coal, interest in alternative energy sources to replace these existing energy sources has been increasing. Among them, solar cells are particularly attracting attention because they are rich in energy resources and do not cause environmental pollution. Among the solar cells are a solar thermal cell that uses heat from the sun to generate steam needed to rotate a turbine, and a solar cell that converts sunlight (photons) into electrical energy using properties ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/042
CPCH01L31/02245H01L31/068H01L31/1804Y02E10/547Y02P70/50H01L31/04
Inventor 文仁植赵银喆李元载
Owner HYUNDAI HEAVY IND CO LTD
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