Two-dimensional perovskite thin film material, solar cell and preparation method of two-dimensional perovskite thin film material

A technology for solar cells and thin-film materials, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems that affect the performance of perovskite materials, and achieve the effects of short preparation cycle, good application prospects, and large grain size
CN113285027AActive Publication Date: 2021-08-20NANJING UNIV OF INFORMATION SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV OF INFORMATION SCI & TECH
Publication Date
2021-08-20

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Abstract

The invention discloses a two-dimensional perovskite thin film material, a solar cell and a preparation method of the two-dimensional perovskite thin film material. Lead iodide, formamidine iodide, chloromethylamine, calcium bromide and calcium iodide are used as raw materials, dimethylformamide and dimethyl sulfoxide are used as a mixed solvent to prepare a perovskite precursor solution, and the film material is obtained through annealing after spin coating. The solar cell sequentially comprises a conductive substrate, an electron transport layer and a perovskite light absorption layer, a perovskite precursor solution is spin-coated on the conductive substrate coated with the electron transport layer, and the two-dimensional perovskite solar cell is prepared after annealing. The two-dimensional perovskite thin film material is used as a perovskite light absorption layer material in a solar cell. The chemical composition of the two-dimensional perovskite thin film is (CaBr) 2 (FA) n-1PbnI3n + 1, wherein FA is formamidine cations. According to the preparation method provided by the invention, the two-dimensional perovskite thin film material with relatively high crystallinity and relatively good performance can be obtained so that the photoelectric performance and efficiency of the perovskite solar cell are improved.
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Description

technical field

[0001] The invention belongs to the technical field of perovskite thin film materials, and in particular relates to a two-dimensional perovskite thin film material, a solar cell and a preparation method thereof. Background technique

[0002] Perovskite materials have excellent photoelectric properties and have attracted much attention from researchers. The development of perovskite solar cells is extremely rapid. In just ten years, the efficiency has increased from 3.8% to more than 25%. Among the light-absorbing layer materials of perovskite solar cells, most researchers choose three-dimensional CH 3 NH 3 PB 3 (MAPbI 3 ) perovskite materials, because of their outstanding natural advantages, such as high light absorption coefficient, good bipolar transport properties of electrons and holes, tunable band gap, small exciton binding energy and high loading capacity. The carrier diffusion length, etc., are also widely used in light-emitting diodes, lasers, ph...

Claims

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