Film solar cell

A solar cell and thin film technology, applied in the field of solar cells, can solve the problems of lower substrate temperature, lower photoelectric conversion efficiency of CIGS cells, uncontrollable alkaline elements, etc., to reduce surface recombination, improve photoelectric conversion efficiency, and increase open circuit voltage Effect

Inactive Publication Date: 2018-07-10
BEIJING APOLLO DING RONG SOLAR TECH
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Problems solved by technology

After the absorption layer is prepared, before being transferred to the next stage of the process, the temperature of the substrate is lowered, and the alkaline elements diffuse back to the bottom of the CIGS layer, resulting in uncontrollable alkaline elements on the surface of the CIGS, which in turn makes the alkaline elements uncontrollable during the entire process. Reduced photoelectric conversion efficiency of CIGS cells

Method used

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  • Film solar cell

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Embodiment Construction

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0030] Such as figure 1 As shown, the embodiment of the present invention provides a thin film solar cell, which includes a substrate 100, wherein the substrate 100 can be a floating glass substrate, and the substrate 100 is sequentially provided with a molybdenum layer 200, a first alkaline element layer 300, a light absorbing layer 400 , the second basic element layer 500 , the buffer layer 600 and the transparent conductive layer 700 . It should be noted that the thin-film solar cell may be a flexible thin-film solar cell or a rigid ...

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Abstract

The invention discloses a film solar cell, and the cell comprises a substrate on which a molybdenum layer, a first alkaline element layer, a light absorbing layer, a second alkaline element layer, a buffering layer and a transparent conductive layer are sequentially disposed. According to the invention, alkali metal elements in the second alkaline element layer and the elements in the light absorbing layer are enabled to react to form a film layer containing the alkali metal elements through the setting of the second alkaline element layer, thereby changing the components of the surface of thelight absorbing layer, further changing the electronic structure of the light absorbing layer through ion exchange, reduces the surface recombination of carriers between layers, enabling the post-preparation processing technology to increase a battery open-circuit voltage, and improving the photoelectric conversion efficiency of the cell.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a thin-film solar cell. Background technique [0002] With the rapid development of industry, severe energy and environmental problems are becoming more and more serious, and the utilization of solar energy has become a research hotspot in various countries. Among them, in the field of solar cell technology, copper indium gallium selenide (CIGS) is a direct bandgap semiconductor. With the doping of Ga element, the bandgap width of CIGS can be adjusted between 1.02eV and 1.68eV. CIGS has a high absorption coefficient for visible light and is the most promising material for making high-efficiency and low-cost thin-film solar cells. [0003] The glass substrate of the CIGS battery contains alkaline elements, and an alkaline compound layer is evaporated between the CIGS and the Mo layer as a barrier adjustment for the alkaline elements in the absorbing layer. However, in the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0445
CPCH01L31/0445H01L31/0322H01L31/0749Y02E10/541H01L31/032H01L31/03923Y02E10/50
Inventor 聂曼杨立红
Owner BEIJING APOLLO DING RONG SOLAR TECH
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