A coating-encapsulated thin-film solar cell and its forming method

A technology of solar cells and thin films, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems of ethylene-tetrafluoroethylene copolymer films without heat sealing performance, poor component compatibility, and high technical requirements, and achieve fast and effective Encapsulation process, good product performance and simple process

Active Publication Date: 2021-03-16
JUHUA GROUP TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the selection of the formula is too complicated, the compatibility between the ingredients is poor, and the cost is high
The disadvantage is that in actual use, because the ethylene-tetrafluoroethylene copolymer film does not have heat sealing performance, the purpose of packaging must be achieved by means of glue
At present, in the preparation of silicon-based solar cells, the technology of texturing or depositing anti-reflection coatings is often used to introduce light-trapping structures, but these methods have obvious defects, such as high technical requirements, complicated processes, cost and environmental protection.

Method used

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  • A coating-encapsulated thin-film solar cell and its forming method
  • A coating-encapsulated thin-film solar cell and its forming method
  • A coating-encapsulated thin-film solar cell and its forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for forming a thin-film solar cell encapsulated by a paint, comprising the following steps:

[0031] (1) Spray the mixed powder of ETFE and PTFE (the mass ratio of ETFE and PTFE is 99:1) on the polycrystalline silicon thin film solar cell by electrostatic spraying process, and then put it into an oven at 250°C for plasticization to obtain astigmatism on the surface layers of solar cells;

[0032] (2) Spray ETFE powder on the solar cell with a light-scattering layer obtained in step (1) by electrostatic spraying process, then bake at 250° C. and cool to obtain a coating-encapsulated thin-film solar cell.

[0033] Results: The thickness of the encapsulation layer of the prepared coating-encapsulated thin-film solar cell product is 50 microns, and the thickness of the scattering layer is 10 microns. The properties are shown in Table 1.

Embodiment 2

[0035] A method for forming a thin-film solar cell encapsulated by a paint, comprising the following steps:

[0036] (1) Spray the mixed powder of ETFE and FEP (the mass ratio of ETFE and FEP is 95:5) on the polysilicon thin film solar cell by electrostatic spraying process, and then put it into an oven at 270°C for plasticization to obtain a surface with Solar cells in the light-scattering layer;

[0037] (2) The ETFE powder is sprayed on the solar cell with a light-scattering layer obtained in step (1) by an electrostatic spraying process, and then baked at 270° C. and then cooled to obtain a coating-encapsulated thin-film solar cell.

[0038] Results: The thickness of the encapsulation layer of the prepared coating-encapsulated thin-film solar cell product was 80 microns, and the thickness of the scattering layer was 20 microns. The properties are shown in Table 1.

Embodiment 3

[0040] A method for forming a thin-film solar cell encapsulated by a paint, comprising the following steps:

[0041] (1) The mixed powder of ETFE and FEP (the mass ratio of ETFE and FEP is 90:10) is sprayed on polycrystalline silicon thin film solar cells by electrostatic spraying process, and then put into an oven at 300°C for plasticization to obtain astigmatism on the surface layers of solar cells;

[0042] (2) Spray ETFE powder on the solar cell with a light-scattering layer on the surface obtained in step (1) by using an electrostatic spraying process, then bake at 300° C. and cool to obtain a coating-encapsulated thin-film solar cell.

[0043] Results: The thickness of the encapsulation layer of the prepared coating-encapsulated thin-film solar cell product is 100 microns, and the thickness of the scattering layer is 30 microns. The properties are shown in Table 1.

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Abstract

The invention relates to a coating packaged thin film solar cell. The coating packaged thin film solar cell comprises a thin film solar cell layer, and the thin film solar cell is composed of a coating package layer, an astigmatism layer, the thin film solar cell layer, an astigmatism layer and a coating package layer in sequence from top to bottom. The coating packaged thin film solar cell provided by the invention has the advantages of simple process, low cost and good product performance.

Description

technical field [0001] The invention belongs to the field of thin-film solar cells, and in particular relates to a coating-encapsulated thin-film solar cell and a forming method thereof. Background technique [0002] Thin-film solar cells, as a new generation of solar cells, are being used more and more widely. The working environment of solar cells is generally outdoors, so the cells need to be packaged. The traditional encapsulation technology is to use a vacuum lamination process to encapsulate an adhesive layer (EVA) and a protective material (glass or transparent polymer) on the surface of the solar cell. Although this process is very mature, the poor weather resistance and aging resistance of EVA itself limit the service life of solar cells, and this process can only produce flat-plate modules, and the production efficiency is not high. [0003] For example, Chinese Patent Publication No. CN101626039A discloses a kind of EVA adhesive film for encapsulating solar cell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/048H01L31/054
CPCH01L31/0481H01L31/054Y02E10/52
Inventor 孙洪阳邵春明周承义陈振华
Owner JUHUA GROUP TECH CENT
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