Flexible solar battery and manufacturing method thereof

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 slow growth of flexible solar cells, complicated production process, high cost, etc., shorten the waiting time for cooling down, install And the effect of easy disassembly and not easy to break

Active Publication Date: 2008-07-30
李毅
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the large-scale production of flexible solar cells adopts the roll-to-roll coating method, which is the method of manufacturing amorphous silicon flexible solar cells. The production equipment is expensive, the production process is complicated, and the product cost is high.
In this way, the price of

Method used

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  • Flexible solar battery and manufacturing method thereof
  • Flexible solar battery and manufacturing method thereof
  • Flexible solar battery and manufacturing method thereof

Examples

Experimental program
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Effect test

example 1

[0052] Example 1 Process for preparing flexible amorphous silicon solar cells:

[0053] (1), according to 3,3'-trifluorodimethyl-4,4'diaminodiphenylmethane: N,N-dimethylacetamide: 2,3,3',4'-biphenyl tetra Formic acid dianhydride = 0.9: 45: The polyamic acid slurry prepared by the molar ratio of 0.9 is vacuum filtered, and then a layer of film is made on a 0.5mm thick stainless steel plate by screen printing or spraying, and put into Dry in an oven according to the following procedures: 120°C / 1h; 170°C / 1h; 280°C / 1h; 350°C / 1h. After cooling, a uniform transparent modified polyimide substrate is obtained.

[0054] (2), the modified polyimide substrate is installed on the substrate frame and stretched out. The substrate frame is 1220mm long and 356mm wide.

[0055] (3) Depositing a layer of ZnO transparent conductive film with sheet resistance 15Ω / □ and light transmittance 93% on the modified polyimide substrate by magnetron sputtering at a temperature of 350°C.

[0056] (4) La...

example 2

[0066] The manufacturing steps of the flexible amorphous silicon solar cell are the same as in Example 1, only the modified PI substrate production formula in step 1, the deposition temperature of the amorphous silicon film in step 7, and the thickness of each layer of film are changed:

[0067] Press 3,3'-trifluorodimethyl-4,4'diaminodiphenylmethane: N,N-dimethylacetamide: 2,3,3',4'-biphenyltetracarboxylic dianhydride= The diamine monomer 3,3'-trifluorodimethyl-4,4'diaminodiphenylmethane was added to the N,N-dimethylacetamide DMAc solution at a molar ratio of 1.0:47:1.0, fully Inject nitrogen, stir at room temperature for 5 minutes, start to add 2,3,3`,4`-biphenyltetracarboxylic dianhydride a-BPDA. Under nitrogen protection, stir at room temperature for 20 hours. After vacuum defoaming and filtration, Obtain a colorless and transparent polyamic acid viscous solution. Spread the solution on a clean glass plate, then put it in an oven and dry it according to the following proce...

example 3

[0070] The manufacturing steps of the flexible amorphous silicon solar cell are the same as in Example 1, only the deposition temperature of the ZnO transparent conductive film in step 3 and the deposition temperature of the microcrystalline silicon thin film in step 7 are changed:

[0071] A ZnO transparent conductive film with a sheet resistance of 14Ω / □ and a light transmittance of 90% was deposited on the modified PI substrate by magnetron sputtering at a temperature of 370°C.

[0072] Deposit the P-type microcrystalline silicon thin film layer of the bottom cell at a temperature of 400°C and the N-type microcrystalline silicon thin film layer of the top cell Form a tunnel junction.

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Abstract

The invention relates to a solar photovoltaic battery manufactured on modified flexible substrate with high light transmittance, which belongs to the field of flexible amorphous silicon film solar cell manufacture technology. The invention aims to improve the photoelectric conversion efficiency and is manufactured by following steps: selecting a modified PI (polyimide) material with light transmittance of 90 to 93% as the substrate, changing the lamination structure of an amorphous silicon PIN film, depositing a transparent conductive oxide (TCO) thin film by sputtering at a temperature above 350 DEG C, and manufacturing single-junction or multi-junction flexible amorphous silicon battery by using the PI substrate with high light transmittance. The invention has the positive effects that the modified substrate in the manufacture and application does not deform in four hours at a temperature between 350 to 400 DEG C, thus significantly improving the photoelectric conversion efficiency and the performance price ratio of the flexible amorphous silicon solar battery.

Description

technical field [0001] The patent of the invention relates to the manufacture of solar photovoltaic cells on a modified flexible substrate with high light transmittance, and belongs to the technical field of manufacturing flexible amorphous silicon thin film solar cells. Background technique [0002] At present, commercially produced solar cells are divided into two categories, one is bulk crystalline silicon solar cells, and the other is thin-film solar cells represented by amorphous silicon solar cells and copper indium selenium solar cells. Thin film solar cells can be divided into hard substrate and soft substrate thin film solar cells by substrate type. Today, the thin-film solar cell market is mainly based on glass, which belongs to hard substrate cells, and the product occupies the largest share. Relatively speaking, thin-film solar cells with soft substrates are rare in the market. The key is to choose suitable substrate materials that can meet the requirements of m...

Claims

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Application Information

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IPC IPC(8): H01L31/075H01L31/042H01L31/20H01L31/048
CPCY02E10/50Y02E10/548Y02P70/50
Inventor 李毅胡盛明熊正根
Owner 李毅
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