Intermediate layer suitable for laminated solar cell, cell and preparation method

Abstract

The invention discloses an intermediate layer suitable for a laminated solar cell, a cell and a preparation method. MXene is adopted as a composite layer of the intermediate layer, good optical transmittance can be achieved while good electrical properties are ensured, and the intermediate layer is provided with a p type selective contact layer/MXene/n type selective contact layer structure. The intermediate layer can be used as an intermediate layer of a perovskite lamination device. According to the invention, the problem of electrical or optical loss of the middle layer of the prepared perovskite/perovskite two-end laminated solar cell can be solved, and the open-circuit voltage and the short-circuit current loss of the laminated device are reduced.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to an intermediate layer suitable for stacked solar cells, a cell and a preparation method. Background technique [0002] In the field of solar cell applications, the basic goal is to continuously reduce the cost of photovoltaic take-off and landing, and continuously improving the photoelectric conversion efficiency of photovoltaic devices is an effective way to reduce costs. Improving the photoelectric conversion efficiency of photovoltaic devices is mainly achieved by increasing the full-spectrum absorption rate of sunlight and reducing various energy losses. The spectral absorption of the solar spectrum can be achieved by constructing multi-energy ribbon structure tandem cells, which can break through the Shockley–Queisser limit efficiency, so tandem solar cells have been extensively studied. In a tandem solar cell, the structure that electrically connects and optically coup...

AI Technical Summary

Problems solved by technology

At present, the commonly used intermediate layer structure is generally: p-type selective contact layer / TCO (metal) / n-type selective contact layer, but this structure still has big problems

When TCO is used in the middle composite layer, TCO usually has a large parasitic absorption in the near-infrared region, resulting in optical loss, and TCO usually has a large contact resistance, resulting in electrical loss; when metal is used as the composite layer, although the metal has Higher conductivity, but more severe optical losses

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