Dual node flexible overlapping thin film solar battery for space

Abstract

The utility model discloses a spatial solar battery of binodal flexible laminated film. The thin film solar battery comprises two cascaded cells which are made via magnetic control sputtering on the flexible composite substrate. The solar battery is characterized in that the flexible composite substrate comprises a transparent polyimide film, a SiO2-TiO2 or SiO2-ZrO2 broadband antireflection film orderly built on one side of the polyimide film via means of sol-gel and polyhedral oligomeric silsesquioxane layers of anti-ozone corrosion. The two solar cells of upper and lower cells are arranged in sequence on the other side of the polyimide film of the flexible composite substrate. The solar battery has advantages that the substrate adopts a composite substrate; the SiO2-TiO2 or SiO2-ZrO2 broadband anti-reflection film improves the light transmittance; the polyhedral oligomeric silsesquioxane film enhances anti-ozone capacity of the battery. The two cells are superimposed in series, improving the utilization of the solar spectrum, hence better photoelectric conversion.

Description

technical field [0001] The invention relates to a solar cell, in particular to a double-junction flexible laminated thin-film solar cell used in space, which is connected in series by two sub-cells and can absorb solar energy in a wide band. Background technique [0002] Flexible thin-film solar cells are lightweight and can be folded, rolled, and even pasted on other surfaces, such as car glass, clothing, tents, and building surfaces. From the perspective of commercial product development, the development of flexible, low-cost, high-efficiency, light-weight, and large-area thin-film solar cells is also of great practical significance. Therefore, people have turned their attention to this new type of thin film solar cell. [0003] At present, the materials suitable for manufacturing flexible thin film solar cells include amorphous silicon, CdTe, CuIn (1-x) Ga x Se 2 (referred to as CIGS); however, due to the instability and multiple defects of these materials, the stabil...

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Problems solved by technology

[0003] At present, the materials suitable for manufacturing flexible thin-film solar cells include amorphous silicon, CdTe, CuIn (1-x) Ga x Se 2 (referred to as CIGS); however, due to the instability and multiple defects of these materials, the stability of thin-film solar cells is poor, making it difficult to further improve the efficiency of large-area cells. For example, the quantum efficiency of flexible thin-film single-junction cadmium telluride solar cells is only around 10%

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