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Preparation method of laminated solar battery, and structure of lamination solar battery

A technology for solar cells and tandem cells, applied in the field of solar cells, can solve the problems that the conversion efficiency of cells cannot be further improved, and the sunlight cannot be fully utilized, and achieve the effects of improving the conversion efficiency of cells and broadening the absorption wavelength range.

Active Publication Date: 2016-07-06
紫石能源有限公司
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Problems solved by technology

If it is only a single-junction solar cell, it will not only be unable to make full use of sunlight, but it will also make it difficult to further improve the conversion efficiency of the cell

Method used

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  • Preparation method of laminated solar battery, and structure of lamination solar battery
  • Preparation method of laminated solar battery, and structure of lamination solar battery
  • Preparation method of laminated solar battery, and structure of lamination solar battery

Examples

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Embodiment 1

[0064] The monocrystalline silicon / copper indium gallium selenium tandem solar cell is prepared by lift-off technology. The specific preparation process is as follows:

[0065] Step 1, using P-type monocrystalline silicon wafers to prepare monocrystalline silicon cells, such as figure 1 Shown:

[0066] (1) Cleaning: Use acetone solution to remove dust, metal chips, grease, etc. contaminated on the silicon wafer, and then use NaOH solution to remove the damaged layer on the surface of the silicon wafer. The thickness of the damaged layer is 30-50 μm.

[0067] (2) Fabrication of the textured surface: Anisotropic etching was carried out on the silicon wafer with NaOH dilute solution with a concentration of about 1%, and the etching temperature was 80° C., and the textured surface was prepared on the surface of the silicon wafer.

[0068] (3) Phosphorus diffusion: use N at a high temperature of 850°C 2 POCI 3 Bring it into the reaction vessel for phosphorus diffusion to form a ...

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Abstract

The invention discloses a preparation method of a laminated solar battery, and a structure of a laminated solar battery. The method comprises the following steps: preparing a solar battery by use of a P-type monocrystalline silicon chip; preparing a back electrode and a sacrificial layer on a substrate; preparing a CIGS film solar battery on the sacrificial layer, then respectively depositing metal bonding layers on a P-type silicon layer of the monocrystalline silicon battery and a window layer of the CIGS film solar battery; performing metal bonding on the prepared metal bonding layer on the monocrystalline silicon battery with the metal bonding layer on the surface of the CIGS solar battery; peeling the substrate from a monocrystalline silicon / CIGS laminated battery after the bonding at a normal temperature; and respectively depositing electrodes on the monocrystalline silicon battery and the CIGS battery to obtain the monocrystalline silicon / CIGS laminated solar battery. The monocrystalline silicon / CIGS laminated solar battery is prepared by use of a peeling technology, firstly, the monocrystalline silicon battery and the CIGS film solar battery are separately prepared, then the laminated battery is prepared by use of a metal bonding technology, and the photoelectric conversion efficiency of the laminated solar battery is improved by 5% to 20% compared to that of the monocrystalline silicon chip.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a method for preparing a stacked solar cell and its structure, which can make full use of light energy and improve the conversion efficiency of the solar cell. Background technique [0002] With the development of economy and society, people's demand for energy is also increasing day by day. Due to the limited reserves of conventional fossil energy, it pollutes the environment. Therefore, the development and utilization of new clean energy has become the only way to solve the shortage of conventional energy and environmental pollution. Since solar energy is inexhaustible, clean and pollution-free, it is the most ideal and sustainable renewable energy in the future. Solar cells directly convert light energy into electrical energy, which is an important way to utilize solar energy. [0003] The real solar cell in the modern sense began in 1954 at Bell Laboratories in the Uni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/02H01L31/078
CPCY02E10/50Y02P70/50
Inventor 韩安军张庆钊彭东阳顾世海李琳琳
Owner 紫石能源有限公司
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