Perovskite plane heterojunction solar cell and preparation method therefor

Abstract

The invention relates to a perovskite plane heterojunction solar cell and a preparation method therefor. The solar cell comprises a conductive substrate FTO, an electron transmission layer, a three dimensional-two dimensional perovskite layer, a hole transmission layer, and electrodes. The three dimensional-two dimensional perovskite layer is prepared through a vapor phase method. The three dimensional-two dimensional perovskite layer serves as a light absorbing layer, thereby greatly improving the humidity and temperature stability of the solar cell, reducing the requirements for the packaging technology, and reducing the consumption of an organic solvent. Moreover, the three dimensional-two dimensional perovskite layer prepared through the vapor phase method is higher in industrial production value, and provides a new idea for the industrial production of the perovskite solar cell with the high stability.

Description

technical field [0001] The invention belongs to the technical field of solar cell preparation, and in particular relates to a perovskite planar heterojunction solar cell and a preparation method thereof. Background technique [0002] Organic-inorganic hybrid perovskite solar cells have been a research hotspot in the field of solar cells in recent years. Due to the excellent properties of organic-inorganic hybrid perovskite materials such as large absorption coefficient, long carrier lifetime and suitable and adjustable band gap, organic-inorganic hybrid perovskite materials The photoelectric conversion efficiency of solar cells has increased from 3.8% to 22.7% in just a few years. The large coefficient and long carrier life of perovskite make the thickness of the light absorbing layer only need about 300nm, and the adjustable band gap makes perovskite materials not only applied in the field of solar cells, but also in It has also been applied to light-emitting devices. ...

AI Technical Summary

Problems solved by technology

in BA + ions and Cs + In terms of the introduction of ions, by combining BAI, FAI, CsI, etc. with PbBr 2 and PbI 2 Dissolved in organic solvents such as DMF in a certain proportion, the prepared perovskite solar cells have good stability, but the preparation method is complicated

[0005] Currently using BA + Cation instead of MA + The ion method is realized by the solution method. The organic solvents such as DMSO, GBL, and DMF introduced in the preparation process of the solution method have many uncertain effects on the film quality of the perovskite. What is more unfavorable is that these solvents are all There is a certain degree of toxicity, if the follow-up treatment is not proper, large-scale application will inevitably lead to serious environmental problems

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