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Composite thin film solar cell and preparation method thereof

A technology of solar cells and composite thin films, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problem of low battery conversion efficiency, copper indium gallium selenide thin film batteries due to scarcity of raw materials, unsuitable for large-scale application of copper zinc tin sulfur thin films and other problems, to achieve the effect of improving photoelectric conversion efficiency, solving low conversion efficiency and improving firmness

Active Publication Date: 2019-05-17
SHENZHEN UNIV
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Problems solved by technology

[0003] The invention provides a composite thin-film solar cell and a preparation method thereof, aiming at solving the problems that the existing copper indium gallium selenide thin film cells are not suitable for large-scale application due to the scarcity of raw materials and the conversion efficiency of copper zinc tin sulfur thin film cells is not high.

Method used

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  • Composite thin film solar cell and preparation method thereof
  • Composite thin film solar cell and preparation method thereof
  • Composite thin film solar cell and preparation method thereof

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preparation example Construction

[0048] see figure 2 , the preparation method of the composite thin film solar cell comprises the following steps:

[0049] S01. Provide a substrate deposited with a molybdenum electrode layer; that is, a layer of molybdenum electrode layer is stacked on the surface of the substrate. For example, molybdenum can be coated on the substrate by electron beam coating process, sputtering process, chemical vapor deposition (CVD) process or metal organic chemical vapor deposition (MOCVD) process.

[0050] S02. Depositing a first copper indium gallium selenide layer on the surface of the molybdenum electrode layer by using a pulsed laser deposition method.

[0051] Specifically, in step S02, the diameter of the target is 50mm, the thickness is 3-8mm, the temperature of the substrate is controlled at 400-450°C, the distance from the target to the substrate is 35-45mm, and the laser wavelength of the pulsed laser is 240-250nm , the frequency is 8-16 Hz, the pulse energy is 250-400 mill...

Embodiment 1

[0063] Embodiment 1 provides a composite thin film solar cell and a preparation method thereof. Wherein, the composite thin film solar cell has such figure 1 The structure shown, that is, includes:

[0064] Substrate 1, the substrate 1 is K9 glass;

[0065] molybdenum electrode layer 2, the molybdenum electrode layer 2 is stacked on the surface of the substrate 1;

[0066] A light-absorbing composite layer 3, the light-absorbing composite layer 3 includes a first copper indium gallium selenide layer 31 stacked on the surface of the molybdenum electrode 2, a copper zinc tin sulfur layer stacked on the surface of the first copper indium gallium selenide layer 31 32 and the second copper indium gallium selenide layer 33 stacked on the surface of the copper zinc tin sulfur layer 32, wherein the thickness of the first copper indium gallium selenide layer 31 is 100 nm, the thickness of the copper zinc tin sulfur layer 32 is 800 nm, and the thickness of the first copper indium gall...

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Abstract

The invention relates to the technical field of thin film solar cells, and in particular to a composite thin film solar cell and a preparation method thereof. The composite thin film solar cell comprises a substrate, a molybdenum electrode layer laminated on the surface of the substrate, a light absorbing composite layer laminated on the surface of the molybdenum back electrode layer, a buffer layer laminated on the surface of the light absorbing composite layer, an N-type semiconductor layer laminated on the surface of the buffer layer, a transparent conductive layer laminated on the surfaceof the N-type semiconductor layer and a metal electrode layer laminated on the surface of the transparent conductive layer, wherein the light absorbing composite layer comprises a first copper indiumgallium selenide layer, a copper zinc tin sulfide layer and a second a copper indium gallium selenide layer, the copper zinc tin sulfide layer has a first surface and a second surface opposite to eachother, the first copper indium gallium selenide layer is laminated on the first surface of the copper zinc tin sulfide layer, and the second copper indium gallium selenide layer is laminated on the second surface of the copper zinc tin sulfide layer. In the composite thin film solar cell provided by the invention, the light absorbing layer is a composite thin film ofa sandwich structure to remarkably improve the photoelectric conversion efficiency of the solar cell.

Description

technical field [0001] The invention belongs to the technical field of thin-film solar cells, and in particular relates to a composite thin-film solar cell and a preparation method thereof. Background technique [0002] With the increasing consumption of petrochemical and other non-renewable energy sources, it has become the consensus of all countries in the world to find new energy sources to replace petrochemical energy sources. A solar cell is a device that directly converts light energy into electrical energy through the photoelectric effect or photochemical effect. Because solar cells can directly convert inexhaustible solar energy into clean energy that can be used by humans, it has attracted much attention. At present, according to the different materials used in solar cells, solar cells can be divided into silicon solar cells, multi-component compound thin-film solar cells, polymer multilayer modified electrode solar cells, nanocrystalline solar cells, and organic so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0336H01L31/0392H01L31/0749H01L31/18
CPCY02E10/541Y02P70/50
Inventor 胡居广王斌肖惑梁广兴苏正华
Owner SHENZHEN UNIV
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