Preparation method of perovskite solar cell with perovskite layer passivated by nanofibers

Abstract

The invention provides a preparation method of a solar cell using nanofibers as a perovskite layer passivation material. The perovskite solar cell comprises a transparent conductive layer, an electron transport layer, a perovskite photosensitive layer, a hole transport layer and a metal electrode layer, and is characterized in that the perovskite layer passivation material is nanofibers, and the nanofibers are prepared by an electrostatic spinning technology. The invention further provides the preparation method of the perovskite solar cell with the perovskite layer passivated by the nanofibers, the perovskite layer is prepared by adopting a method of spin-coating a mixed solution of the perovskite and the nanofibers, wherein the nanofibers can generate strong complexing and coordination effects with lead ions in the perovskite layer, so that electronic defects at crystal boundaries are filled up, and nucleation sites are provided for crystallization of perovskite to induce crystallization, and the energy conversion efficiency of the prepared perovskite cell reaches 20.3%.

Description

technical field [0001] The invention belongs to the technical field of perovskite solar cells, and in particular relates to a perovskite solar cell with a perovskite layer passivated by nanofibers and a preparation method thereof. Background technique [0002] Solar cells prepared with perovskite materials as the photosensitive layer have become a research hotspot in the third generation of photovoltaic technology due to their low cost and high energy conversion efficiency. Since 2009, the energy conversion efficiency of a single-junction perovskite solar cell has rapidly increased from 3.8% to 25.5%. Compared with other traditional solar cells, perovskite solar cells are more susceptible to moisture, oxygen, temperature, light and other factors, and perovskite solar cells are prone to ion migration under light, which greatly reduces the battery life. environmental stability. The most important reason for limiting the stability of perovskite solar cells is that the surface...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing solar cells with nanofiber passivation perovskite layer. For current perovskite solar cells, there are still poor water and oxygen stability, which leads to low efficiency of perovskite cells. The problem is that nanofibers are added to the perovskite layer, and the water and oxygen stability of perovskite solar cells can be improved through the complexation and coordination of functional groups on nanofibers and lead ions, and the photoelectric conversion of perovskite solar cells can be improved. efficiency

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