Preparation method of crystalline silicon perovskite laminated solar cell

Abstract

The invention belongs to the technical field of solar cells, and provides a preparation method of a crystalline silicon perovskite laminated solar cell, which comprises the following steps of: preparing a P + emitter on the front surface of a silicon substrate of an n-type crystal; sequentially preparing tunneling silicon oxide and doped polycrystalline silicon on the back surface of the silicon substrate, and selectively doping to form a heavily doped region, namely obtaining a selective back surface field; after the first passivation layer and the second passivation layer are prepared, a first metal electrode and a second metal electrode are prepared, and a crystalline silicon bottom battery is obtained; sequentially preparing an electron transport layer and a perovskite absorption layer which are laminated on the front surface of the transparent bonding layer; preparing a MoOx hole transport layer by adopting an electrochemical method; and preparing a third metal electrode and a fourth metal electrode to obtain the perovskite top cell. The perovskite top cell is stacked on the front surface of the crystalline silicon bottom cell by a transparent adhesive layer. According to the method, the problem of more photon-generated carrier recombination loss in the existing laminated solar cell can be solved, the carrier collection capability of the cell is improved, and the cell efficiency is further improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a method for preparing a crystalline silicon perovskite laminated solar cell. Background technique [0002] The band gap of crystalline silicon solar cells is 1.12eV, and incident photons with energy equal to or higher than 1.12eV can be absorbed by the silicon substrate to generate electron-hole pairs, that is, photogenerated carriers, and the excess energy will be dissipated in the form of heat . However, incident photons with an energy lower than 1.12eV cannot be absorbed by the silicon substrate, and photogenerated carriers cannot be generated, resulting in spectral energy loss; among them, more than 50% of all energy loss is wasted in the form of spectral energy loss dropped. In order to reduce the loss of spectral energy, an effective way is to design multi-junction solar cells, so that under the condition of sharing incident light, the p-n junctions of different band...

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Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies of the prior art, to provide a method for preparing a crystalline silicon perovskite stacked solar cell, to solve the problem that the recombination loss of photogenerated carriers in the existing stacked solar cell is large, to improve The metal electrode of the obtained crystalline silicon perovskite stacked solar cell has the ability to collect carriers, thereby improving the efficiency of the cell

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