Flexible solar cell photovoltaic component made with flexible substrate

A technology for solar cells and photovoltaic modules, applied in photovoltaic power generation, electrical components, circuits, etc., can solve problems such as reducing fill factor, destroying battery electrical performance, increasing leakage current, etc., to reduce composite, photoelectric conversion efficiency and cost performance. Improved, high temperature resistance effect

Active Publication Date: 2012-03-21
李毅
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its defect is that the high-energy plasma generated by laser etching directly causes the direct short circuit of the front and rear electrodes and the crystallization of amorphous silicon particles to be formed on the interface of the etched area, which increases the leakage current and reduces the fill factor. Destroy the battery electrical performance

Method used

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  • Flexible solar cell photovoltaic component made with flexible substrate
  • Flexible solar cell photovoltaic component made with flexible substrate
  • Flexible solar cell photovoltaic component made with flexible substrate

Examples

Experimental program
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Effect test

example 1

[0049] Example 1 Process for preparing flexible amorphous silicon solar cells:

[0050] A 0.5 mm thick stainless steel sheet template (or template for short) is used, on which there are light-transmitting holes (not shown in the figure) distributed in the front electrode pattern, including current guiding holes (or drainage holes for short) and confluence holes ;

[0051] The polyamic acid slurry prepared according to the molar ratio formula;

[0052] The polyamic acid paste is screen-printed on the template, and treated at a high temperature of 350°C to obtain a uniform and transparent modified polyimide substrate with light-transmitting through holes, including current guiding holes and confluence holes;

[0053] Depositing a layer of resistivity on a modified polyimide substrate by magnetron sputtering at a temperature of 350°C

[0054] 15Ω / , ZnO transparent conductive film with light transmittance of 93%;

[0055] No need to scribe ZnO transparent conductive film wit...

example 2

[0063] A 0.5 mm thick stainless steel sheet template (or template for short) is used, on which there are light-transmitting through holes distributed in the front electrode pattern (not shown in the figure), including the preparation and modification of current guiding holes and confluence holes; manufacturing steps In the same example 1, only the modified PI substrate production formula, the deposition temperature of the amorphous silicon film and the thickness of each layer of film are changed:

[0064] According to 3,3`-trifluorodimethyl-4,4`diaminodiphenylmethane: N,N-dimethylacetamide: 2,3,3`,4`-biphenyltetracarboxylic dianhydride= Add the diamine monomer 3,3`-trifluorodimethyl-4,4`diaminodiphenylmethane into the N,N-dimethylacetamide DMAc solution at a molar ratio of 1.0 : 47 : 1.0. Into nitrogen, after stirring at room temperature for 5 minutes, began to add 2,3,3`,4`-biphenyltetracarboxylic dianhydride a-BPDA. Under nitrogen protection, stirred at room temperature for ...

example 3

[0068] The stainless steel sheet template, the modified PI substrate are the same as Example 2, the manufacturing steps of the flexible amorphous silicon solar cell chip are the same as Example 1, and the packaging steps are as follows:

[0069] 1) Use a transparent flexible front plate polymer film (such as polyvinyl fluoride, fluorinated ethylene propylene copolymer, etc.) with a thickness of 25 μm to 75 μm and an adhesive (such as EVA, PE, etc.) layer plane.

[0070] 2) Press-bond the tin-coated copper tape to both ends of the battery chip.

[0071]3) The battery sheet coated with tin strip and the supporting adhesive / transparent flexible front plate polymer film are sent to the hot press. At the same time, the adhesive (such as EVA, PE, etc.) ), with a thickness of 25 μm to 75 μm flexible backplane polymer film (one layer of polymer film or multi-layer organic-inorganic composite material). According to the design requirements of the BIPV module length, the upper two lay...

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Abstract

The invention relates to a high-light transmittance solar photovoltaic component made with modified substrate and belongs to the technical field of thin-film solar cells. The invention aims to provide a light-transmitting flexible cell component made with flexible substrate and a solution to preparation method thereof. The invention has the key technical characteristics as follows: a stainless steel template is processed into a modified polyimide (PI) substrate (PI substrate for short), and light through-holes including guide holes and concentration holes are formed on the substrate and are distributed on stacked film layers of conducting film layers and photoelectric conversion layers in a penetrating manner. The invention has significant effects, reduces the problems of short circuit and electrical leakage due to the crystallization of the photoelectric layer processing interface resulting from laser etching of the transparent conductive film, reduces the procedure of cell surface lamination, and reduces the production cost. The process provided by the invention can significantly improve the conversion efficiency, on-load capacity and price / performance ratio of solar cells. The light-transmitting flexible solar cell photovoltaic component has a wide application range.

Description

technical field [0001] The patent of the invention relates to the preparation of solar photovoltaic modules with high light transmittance by modified substrates, and belongs to the technical field of thin film solar cells. Background technique [0002] At present, the commercial application of solar cell photovoltaic modules is divided into two categories, one is bulk crystalline silicon solar cells, polysilicon, and the other is thin film solar cell silicon-based series, copper indium gallium selenide series, cadmium telluride series, etc. Solar battery. Thin-film solar cell substrate types can be divided into hard substrate and soft substrate. The thin-film solar cell market is mainly based on glass, which belongs to the hard substrate cell, and the product occupies the largest share, while the soft substrate thin-film solar cell market is relatively small. The soft base also includes conductive stainless steel strips and copper strips, and insulating polyimide. U.S. Pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0392H01L31/048H01L27/142H01L31/20
CPCY02E10/50H01L31/0203H01L31/022475H01L31/0392H01L31/048H01L31/03926H01L31/022466H01L31/0468Y02E10/547H01L31/0488H01L31/022483H01L31/1804Y02P70/50
Inventor 李毅
Owner 李毅
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