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Method for curing solar cells to reduce efficiency loss from lamination

A solar cell and pressure technology, applied in the field of solar cells, can solve the problems of sacrificing packaging reliability and weakening the performance of CIGS solar modules

Active Publication Date: 2017-03-01
TAIWAN SEMICON MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CIGS type solar cells are particularly susceptible to damage from lamination-induced energy loss, which is known to result in energy losses ranging from about 8% to about 15%, and which greatly impairs the performance of CIGS type solar modules
Attention in attempting to mitigate LIPL is usually on the package, i.e., the lamination process itself, but these efforts have been ineffective and may sacrifice package reliability

Method used

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  • Method for curing solar cells to reduce efficiency loss from lamination
  • Method for curing solar cells to reduce efficiency loss from lamination
  • Method for curing solar cells to reduce efficiency loss from lamination

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Embodiment Construction

[0046] This disclosure relates to encapsulating and covering solar cells using a lamination process. The present disclosure also relates to treating the absorber layer of a solar cell such that the absorber layer becomes immune to lamination-induced defects and deterioration. This approach involves curing the solar cell and thus the method of the present disclosure is compatible with various lamination processes compared to changing the parameters and conditions of the lamination process itself. The methods of the present disclosure have been found to be particularly useful for solar cells with CIGS absorber layers. CIGS absorber layers are known to include intrinsic or process-generated selenium vacancies (V SE )defect. A large number of selenium vacancy (vacancy) defects reduce solar cell efficiency and effectiveness. In one embodiment, light irradiation is used to deplete these selenium (V SE ) defect passivation. However, thermal annealing has been found to depassivat...

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Abstract

The invention discloses a method for encapsulating solar cells, which includes a curing step for making CIGS or other types of solar cell absorbing layers resist aging under a high-temperature lamination process. A curing step was performed after the IV test and before lamination of the encapsulation film. The curing step is carried out in conjunction with the light irradiation step performed prior to the IV test. The curing step is performed for a time ranging from 10 minutes to two days and under relatively high humidity. A relative humidity of 20-90% is used and is effective for passivating selenium vacancy defects associated with the absorber layer. The cured absorber layer is resistant to aging and produces solar cells with high solar cell efficiencies. The invention also discloses a method of curing solar cells to reduce efficiency loss caused by lamination.

Description

technical field [0001] The present invention relates generally to solar cells, methods of manufacturing and laminating solar cells, and more particularly to methods of light irradiation and curing of solar cells in conjunction with the lamination process. Background technique [0002] Solar cells are photovoltaic modules that generate electricity directly from sunlight. Manufacturing of solar cells has increased dramatically in recent years and continues to increase due to the growing demand for clean energy sources. Various types of solar cells exist and continue to be developed. A solar cell includes an absorber layer that absorbs sunlight that is converted into electrical current. The quality and performance of the absorbent layer is thus paramount. The composition, structure, and integrity of absorber materials are critical in solar cells. To maximize the efficiency of current generation, the absorber layer must resist aging. [0003] One particularly popular type o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18
CPCH01L31/048H01L31/0749Y02E10/541Y02P70/50H01L31/0203
Inventor 黄乙峯潘家叡林光明
Owner TAIWAN SEMICON MFG CO LTD