A method for rapid light-induced attenuation of solar cells
A solar cell, light-induced attenuation technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of decreased efficiency, decreased lifetime of minority carriers, decreased efficiency, etc., to improve the diffusion rate and shorten the experimental period.
Active Publication Date: 2017-08-25
ZHEJIANG JINKO SOLAR CO LTD +1
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Problems solved by technology
[0002] At present, boron-doped P-type crystalline silicon solar cells occupy more than 70% of the photovoltaic market. However, the efficiency of this type of solar cell will decrease when it is used. This phenomenon is called light-induced degradation (Light-induced degradation: LID ), its essence is that the boron and oxygen in the silicon crystal combine to form a boron-oxygen pair recombination center, and the boron-oxygen pair is very easy to capture minority carriers, which reduces the minority carrier lifetime and efficiency. The attenuation ratio of polycrystalline cells is 1% to 2%, while Single crystal attenuation ratio can reach 3% to 5%
[0003] In the prior art, the light-induced attenuation characteristics of the cell or the open-air exposure module are generally studied by irradiating the solar cell with a simulated full-spectrum light source. It is dozens of hours, and the light-induced attenuation experiment cycle of components ranges from one month to several months
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[0028] The core idea of the present invention is to provide a method for rapid light-induced attenuation of solar cells, which can greatly shorten the test period of light-induced attenuation of cells and components.
[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0030] The first method for rapid light-induced attenuation of solar cells provided in the embodiments of this application is as follows: figure 1 as shown, figure 1 It is a schematic diagram of the first method for rapid light-induced attenu...
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The invention discloses a method for rapid light-induced degradation of a solar cell piece. The method comprises the steps of performing thermal annealing on the solar cell piece; and performing high-illumination-intensity irradiation on the solar cell piece. According to the method for the rapid light-induced degradation of the solar cell piece, the experimental period for the light-induced degradation of the solar cell piece can be dramatically shortened.
Description
technical field [0001] The invention relates to the technical field of solar cell manufacturing, in particular to a method for rapid light-induced attenuation of solar cells. Background technique [0002] At present, boron-doped P-type crystalline silicon solar cells occupy more than 70% of the photovoltaic market. However, the efficiency of this type of solar cell will decrease when it is used. This phenomenon is called light-induced degradation (Light-induced degradation: LID ), the essence of which is that boron and oxygen in the silicon crystal combine to form a boron-oxygen pair recombination center, which is very easy to capture minority carriers, which reduces the lifetime of minority carriers and reduces efficiency. The attenuation ratio of polycrystalline cells is 1% to 2%, while The attenuation ratio of single crystal can reach 3% to 5%. [0003] In the prior art, light-induced attenuation characteristics are generally studied by irradiating cells with simulated f...
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IPC IPC(8): H01L31/18
CPCH01L31/186H01L31/1864Y02E10/50Y02P70/50
Inventor 何广东许路加蒋方丹金井升金浩
Owner ZHEJIANG JINKO SOLAR CO LTD