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AssigneesCnbm Research Institute for Advanced Glass Materials Group Co., Ltd., Triumph Science & Technology Group Co., Ltd.
InventorsRene Kalio, Michael Koerbl
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The present invention relates to a thin-film photovoltaic module with a silver sulfide coating, including a glass substrate. A back-contact layer, an absorber layer and a front electrode layer are sequentially stacked on the glass substrate. The top surface of the front electrode layer is coated with a metal grid matching the front electrode layer, the metal grid is made of silver-containing paste, and the surface of the metal grid is covered by a black silver sulfide coating. According to the present invention, by forming the black silver sulfide coating on the surface of the metal grid, the optical reflection of the metal grid is reduced, so that the reflectivity of the metal grid is decreased, and as a result, the brightness of photovoltaic circuits and modules with the metal grid is decreased, improving the appearance.
A thin-film photovoltaic module, consisting of a glass substrate, a back contact layer, an absorber layer, a front electrode, a metal grid and a black silver sulfide coating, wherein the back contact layer, the absorber layer and the front electrode layer are sequentially stacked on the glass substrate, the metal grid is coated on a top surface of the front electrode layer without penetrating into the front electrode layer, the metal grid is made of a silver nanoparticle-containing paste, and a surface of the metal grid is covered by the black silver sulfide coating.
The preparation method 6, wherein the powdery sodium sulfide is pre-prepared into an aqueous sodium sulfide solution, and applied to the surface of the metal grid by heating, vacuum evaporation or vacuum deposition.
Dependencies are inferred from the claim text.