Metal-ion-doped perovskite thin film, preparation method and application therefor

Abstract

The invention discloses a metal-ion-doped perovskite thin film, a preparation method and an application therefor. The preparation method for the metal-ion-doped perovskite thin film comprises the specific steps of dissolving metal powder into an HX solution to form the HX solution containing metal ions, wherein X is Cl, Br or I; enabling the HX solution containing metal ions to be mixed with an methylamine solution, and drying to prepare metal-ion-doped MAX powder; enabling the metal-ion-doped MAX powder to be mixed with the a lead salt, and dissolving the mixture into dimethylformamide to prepare a perovskite precursor liquid, wherein the lead salt is PbBr<2>, PbI<2> or PbCl<2>; and preparing the metal-ion-doped perovskite thin film from the perovskite precursor liquid through a rotary coating process. The metal-ion-doped perovskite thin film is prepared through a liquid phase one-step method; the cover degree of the prepared perovskite thin film is greatly improved; and the requirement of a perovskite solar cell on the high quality of the perovskite thin film can be fully satisfied.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a metal-doped perovskite film, its preparation method and application. Background technique [0002] Solar cells can directly convert solar energy into electrical energy. Since solar energy is an inexhaustible clean energy source, solar cells are an important countermeasure for human beings to cope with the energy crisis and seek sustainable development. Currently, crystalline silicon solar cells account for 89% of the photovoltaic market share. However, expensive raw materials and cumbersome cell processes limit the long-term development of crystalline silicon solar cells. In the past decade, thin-film solar cells include silicon-based thin-film, Cu(In,Ga)Se 2-x S x And CdTe batteries have also begun to achieve large-scale industrialization. As an outstanding representative of the third generation of solar cells, perovskite solar cells are a new type of all-solid-state o...

AI Technical Summary

Problems solved by technology

However, the CH prepared by the liquid-phase one-step method 3 NH 3 PB 3 The poor coverage of the perovskite film leads to direct contact between the hole transport layer (HTM) and the dense layer, resulting in increased recombination of electron-hole pairs, which affects the performance of the battery

Moreover, flat heterojunction cells have problems such as large forward and reverse sweep hysteresis and unstable cell efficiency.

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