Inorganic perovskite solar cell added with CsPbBr3 based on amine compound and preparation method and application thereof

Abstract

The invention provides an inorganic perovskite solar cell added with CsPbBr3 based on an amine compound and a preparation method and application thereof. The method specifically comprises the steps: preparing an electron transport layer on FTO conductive glass, spin-coating the surface of the FTO conductive glass with a lead bromide solution added with an amine compound, spin-coating the surface of the FTO conductive glass with a cesium bromide solution for multiple times to prepare a high-quality perovskite thin film, and finally blade-coating carbon paste as a back electrode to assemble theinorganic perovskite solar cell. According to the invention, the amine compound is added into a lead bromide solution; compared with the prior art, CsPbBr3 crystal grains are crystallized, the growthspeed of the CsPbBr3 crystal grains is reduced, and a compact and uniform perovskite thin film with a large crystal grain size is obtained; in addition, the amine compound can effectively passivate defects on the surface and inside the perovskite thin film, and battery interface energy level matching is improved, so charge recombination is inhibited, and the photovoltaic performance of the batteryis improved. The preparation method disclosed by the invention has the advantages of simplicity, feasibility, low cost, high repeatability, outstanding stability in a high-temperature and high-humidity environment and the like.

Description

technical field [0001] The invention belongs to the field of new material technology and new energy technology, in particular to additive engineering based on amine compound adding CsPbBr 3 Inorganic perovskite solar cells and their application as battery components. Background technique [0002] At present, the photoelectric conversion efficiency of organic-inorganic hybrid perovskite solar cells has reached 25.2%. Perovskite may replace crystalline silicon and become the "new favorite" of solar cells. However, there are still many problems. For example, hybrid perovskite solar cells contain expensive organic components, and their long-term stability in high temperature and high humidity environments is poor, which seriously affects its commercialization process. Hole-free, carbon-based CsPbBr prepared by replacing organic ions with inorganic cesium ions 3 All-inorganic perovskite has become a research hotspot in the field of photovoltaics because of its simple preparatio...

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Problems solved by technology

[0003] CsPbBr prepared by traditional multi-step liquid phase heating method 3 The nucleation and growth of grains are too fast, which is not conducive to the full formation of perovskite crystals, and the defect state density inside and on the surface of the film is high, resulting in serious charge recombination, which limits the improvement of the photoelectric conversion efficiency of the battery

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