Copper-indium-gallium-selenium-perovskite tandem solar cell and making method thereof

Abstract

The invention discloses a copper-indium-gallium-selenium-perovskite tandem solar cell and a making method thereof. A set of tandem solar cell units are arranged on a substrate glass (1), and each unitincludes a bottom cell and a front cell, wherein the bottom cell is composed of a conductive metal layer (2), a CIGS backlight absorption layer (3), an In2S3 buffer layer (4), a window layer (5) andan intermediate electrode layer (6a), and the front cell is composed of a catalytic electrode (7), a hole transfer layer (8), a perovskite layer (9), a dense insulating layer (10) and a front electrode (6b); an insulating region P1 is arranged on the conductive metal layer so as to separate positive electrodes of every two adjacent cell units; Through the arrangement of a series-connection channelP3, the front electrode (6b) is connected with the conductive metal layer (2), and output positive and negative electrodes of the solar cell are arranged on the two sides of the substrate. The solarcell has the advantages that the light absorption and utilization rate is high, output current of the tandem solar cell is matched, the cascaded structure has no loss, and the output voltage and the photoelectric conversion efficiency are high. The copper-indium-gallium-selenium layer of the bottom cell is adjusted so as to achieve the optimum matched absorption of sun light, and the photoelectricconversion efficiency of the solar cell is greatly improved.

Description

Technical field [0001] The invention relates to the technical field of solar cells, in particular to a copper indium gallium selenide perovskite laminated solar cell and a preparation method thereof. Background technique [0002] Solar cells are components that directly convert light energy into electrical energy. Because the solar radiation spectrum has a very wide range (0~4eV), according to the principle of photovoltaic effect, a single solar cell composed of a single semiconductor material can only convert the solar radiation spectrum into Part of the light energy is converted into electric energy, the effective utilization rate of solar energy is low, and the output voltage is low. [0003] The effective means to solve the above problems is to match the solar cell device materials with the energy width of the sunlight, and stack them from the outside to the inside in the order of the energy gap from large to small, so that the light with the shortest wavelength can be used by ...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the disadvantages in the prior art that tandem solar cells cannot reach the best state of the two batteries, the preparation method and the preparation method using CdS have limitations, and cannot be prepared and realized on a large scale, and provide a Copper indium gallium selenide perovskite tandem solar cell and preparation method thereof

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