Thin film solar cell electrode and preparation method thereof

A technology of solar cells and thin films, applied in the field of solar cells, can solve problems such as effective methods and technical means that have not been mentioned, and achieve the effects of improving transfer efficiency, solving binding force, and reducing resistance

Active Publication Date: 2013-04-03
无锡爱尔华精机有限公司
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Problems solved by technology

[0003] Existing solar thin-film cells all adopt a single-layer film structure, and the conversion efficiency of the entire solar cell is b

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  • Thin film solar cell electrode and preparation method thereof
  • Thin film solar cell electrode and preparation method thereof

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[0020] The present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limitation on the protection scope of the present invention.

[0021] Such as figure 1 Compared with the structure of the traditional thin-film solar battery electrode, the molybdenum thin film on the glass substrate 1 of the product of the present invention is composed of two layers of molybdenum crystal grains: coarse particles with a diameter of 12-16nm. The molybdenum crystal grain layer 21 and the fine molybdenum crystal grain layer 22 with a particle size of 2-6 nm, in which the coarse molybdenum crystal grain layer 21 is in contact with the glass substrate 1.

[0022] In the above-mentioned two molybdenum metal crystal grain layers, the thickness of the fine crystal grain layer 22 is 1.6-3.3 times the thickness of the coarse molybdenum crystal grain layer 21, preferably 2 times.

[00...

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Abstract

The invention discloses a thin film solar cell electrode. The thin film solar cell electrode comprises a glass base plate and molybdenum thin film, wherein the molybdenum thin film is laid on the glass base plate. The molybdenum thin film is formed by two layers of molybdenum crystal grains, wherein the two layers of molybdenum crystal grains respectively are a layer of coarse molybdenum crystal grains with grain diameters between 12nm and 16nm and a layer of fine molybdenum crystal grains with grain diameters between 2nm and 6nm, and the coarse molybdenum crystal grain layer is contacted with the glass base plate. The invention further discloses a preparation method of the electrode. A molybdenum metal film layer in a traditional thin film solar cell electrode structure is divided into two layers, wherein the base layer is a coarse crystal grain layer, and the top layer is a fine crystal grain layer, so that not only a function of working as a back electrode is achieved, problems about percolation of sodium atoms and binding force of glass are solved, and resistance of working as the back electrode is reduced, but also switching efficiency of a copper indium gallium selenide (GIGS) thin film cell is improved greatly.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a thin-film solar cell electrode and a preparation method thereof. Background technique [0002] As a sustainable energy alternative, solar photovoltaic power generation has developed rapidly in recent years. At present, more than 30 companies in the world are involved in the thin-film solar cell (CIGS) industry. The research level of Japan, the United States, and Germany is at the leading level in the world, but at present only the 15 MW production lines of German wurth and sola companies have truly achieved mass production. At present, most of the domestic CIGS production projects that have been built or are under construction need to adopt foreign advanced equipment. [0003] Existing solar thin-film cells all adopt a single-layer film structure, and the conversion efficiency of the entire solar cell is below 10%, but there is no mention of other effective methods and te...

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Application Information

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IPC IPC(8): H01L31/0224H01L31/18
CPCY02P70/50
Inventor 刘晓萌
Owner 无锡爱尔华精机有限公司
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