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A kind of cigs solar thin film cell of flexible substrate and preparation method thereof

A solar thin film and flexible substrate technology, applied in the field of solar cells, can solve problems such as affecting the overall output of solar cells, increasing contact resistance of solar cells, and inability to fully absorb incident light, so as to increase current and quantum efficiency, reduce contact resistance, The effect of improving battery output

Active Publication Date: 2021-03-23
SUNFLARE NANJING ENERGY TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the embodiment of the present invention aims to provide a CIGS solar thin film battery with a flexible substrate and its preparation method to solve the problems caused by the current CIGS solar thin film battery due to the use of printing technology for electrode production and the inability to fully absorb incident light. The contact resistance of the solar cell increases and the shading area is large, and the light energy cannot be fully absorbed, which in turn affects the overall output of the solar cell.

Method used

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  • A kind of cigs solar thin film cell of flexible substrate and preparation method thereof
  • A kind of cigs solar thin film cell of flexible substrate and preparation method thereof
  • A kind of cigs solar thin film cell of flexible substrate and preparation method thereof

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Embodiment 1

[0051] The invention discloses a CIGS solar thin film battery with a flexible substrate, as attached figure 1 As shown, it includes a flexible substrate 1 and a back electrode layer 2, an absorption layer 6, a buffer layer 7, an intrinsic zinc oxide high resistance layer 8, and a transparent surface electrode layer 9 stacked on the flexible substrate 1 in sequence; the absorption layer 6 and the back electrode An alkali metal-doped composite layer 4 is arranged between the layers 2; a channel is provided on the alkali metal-doped composite layer 4, and the absorption layer 6 is partially filled in the channel and directly physically contacts the back electrode layer 2; on the transparent surface electrode layer 9 A tin electrode is provided, and the tin electrode is welded on the surface of the transparent surface electrode by means of ultrasonic welding.

[0052] Specifically, the substrate 1 of the above-mentioned flexible substrate CIGS solar thin film cell is a flexible su...

Embodiment 2

[0088] The present invention also provides a method for preparing an electrode of a CIGS solar thin-film battery with a flexible substrate, comprising the following steps:

[0089] S1. Prepare an alkali metal-doped composite layer 4 on the flexible substrate 1 by magnetron sputtering, and then prepare a back electrode layer 2 on the alkali metal-doped composite layer 4;

[0090] S2. Prepare a corrugated Ag film on the back electrode layer 2, prepare an alkali metal-doped composite layer 4 on the corrugated Ag film layer, etch a channel in the middle of the alkali metal-doped composite layer 4, and fill the channel with an upper absorption layer 6;

[0091] S3. Depositing the third CIGS absorbing layer 63 on the back electrode layer 2 and the alkali metal-doped composite layer 4 by multiple sputtering methods, and depositing the second CIGS absorbing layer 62 on the third CIGS absorbing layer 63 in sequence and a first CIGS absorber layer 61;

[0092] S4, preparing a buffer l...

Embodiment 3

[0113] Such as Figure 9 , Figure 10 and Figure 11 As shown, in the implementation of the present invention, a packaging structure 12 of a flexible solar thin film battery, the packaging structure 12 is rectangular, including a protective film, a structural film and a back film pressed from top to bottom. Usually, in order to facilitate processing, CIGS thin-film solar cells with flexible substrates are generally made into rectangles, and the core object of packaging is CIGS thin-film solar cells with flexible substrates, so the packaging structure 12 is rectangular. The size of the structural film and the CIGS solar thin film battery of the flexible substrate are the same; the size of the back film is larger than that of the CIGS solar thin film battery of the flexible substrate; the protective film includes the main body and the side, the main body is the same size as the CIGS solar thin film battery of the flexible substrate, and the side is It is arranged on the four s...

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Abstract

The invention relates to a CIGS solar thin-film battery with a flexible substrate and a preparation method thereof, belongs to the technical field of solar cells, and solves the technical problem of low light absorption efficiency of the CIGS solar thin-film battery in the prior art. The CIGS solar thin-film battery with the flexible substrate comprises a flexible substrate, and a back electrode layer, an absorption layer, a buffer layer, an intrinsic zinc oxide high-impedance layer and a transparent surface electrode layer which are sequentially stacked on the flexible substrate; an alkali metal doped composite layer is arranged between the absorption layer and the back electrode layer; a channel is formed in the alkali metal doped composite layer, and the absorption layer is partially filled in the channel; and a tin electrode is arranged on the transparent surface electrode layer, and the tin electrode is welded on the surface of the transparent surface electrode in an ultrasonic welding mode. According to the CIGS solar thin-film battery, the incident light can be sufficiently absorbed, the light absorption performance of the battery is improved, and further the output performance of the CIGS solar thin-film battery is improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a CIGS solar thin film cell with a flexible substrate and a preparation method thereof. Background technique [0002] Solar thin-film cells are optoelectronic devices that convert light energy into electrical energy. Its photoelectric conversion efficiency is defined as the ratio of the total output power to the total power of sunlight incident on the surface of the solar cell. Since the photoelectric conversion effect occurs inside the cell, solar energy The light absorption characteristics of the cell directly affect its photoelectric conversion efficiency. [0003] The light loss of solar thin-film cells is mainly affected by three aspects: first, the light loss caused by the shielding effect of the metal electrodes on the surface of the battery; The battery reflects about 30% of sunlight; thirdly, the light waves entering the battery cannot be fully absorbed, resulting i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0749H01L31/0224H01L31/056H01L31/18H01L31/048
CPCH01L31/022425H01L31/022441H01L31/022475H01L31/022491H01L31/048H01L31/0749H01L31/18H01L31/056Y02E10/52Y02E10/541Y02P70/50
Inventor 张准王磊
Owner SUNFLARE NANJING ENERGY TECH LTD
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