Silicon heterojunction/perovskite based double-electrode laminated solar cell

A solar cell and silicon heterojunction technology, applied in the field of solar cells, can solve the problems of restricting cell performance, weak perovskite spectral response, and large band gap
CN109935690APending Publication Date: 2019-06-25PEKING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
PEKING UNIV
Publication Date
2019-06-25

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Abstract

The invention relates to a preparation method for a silicon heterojunction / perovskite based double-electrode laminated solar cell. Compared with a unijunction solar cell, the laminated solar cell canutilize medium-short wave photons in the sun spectrum more effectively to achieve a higher efficiency. The laminated solar cell based on silicon heterojunction / perovskite electrodes comprises a top wide-band-gap perovskite solar cell and a narrow-band-gap silicon cell, and also comprises an anti-reflecting layer, a transparent top electrode, a protective layer, a perovskite absorbing layer, an electron transmission layer, an intermediate layer, a Si heterojunction battery and a metal electrode successively from top to bottom. The tunnel junction and perovskite absorbing layer are prepared at low temperature. The silicon heterojunction / perovskite double-electrode laminated solar cell prepared by a simple low-cost solution method can reach the efficiency of 22.22% which is in a leading position domestically.
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Description

technical field

[0001] The invention relates to the field of solar cells, in particular to a method for preparing a stacked solar cell based on a silicon heterojunction / perovskite two-electrode. Background technique

[0002] The energy distribution of the solar spectrum is relatively wide, and the photoelectric response spectrum range of a single semiconductor material is too narrow compared with the solar spectrum, which fundamentally restricts the improvement of efficiency. Combining semiconductor materials with different bandgap widths to form multi-junction semiconductor solar cells. The incident light of different wavelength ranges is absorbed respectively, and the energy band of the top cell is the largest, and the energy band of the bottom layer decreases successively. Multi-junction semiconductor solar cells have become the most potential solar cells for current applications due to their advantages such as high conversion efficiency, good temperature characteristics...

Claims

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