Perovskite solar cell with excellent performance

Abstract

The invention discloses a perovskite solar cell with the excellent performance and a preparing method thereof. The perovskite solar cell comprises a light-transmitting / transparent electrode layer, an electron transporting layer, a light absorption layer, an electron absorption layer and a top electrode, wherein the light-transmitting / transparent electrode layer, the electron transporting layer, the light absorption layer, the electron absorption layer and the top electrode are sequentially stacked, and the light absorption layer is made from a material which is of a perovskite structure; the electron absorption layer is formed by a fullerene derivative; the top electrode is formed by a material with the good electrical conductivity. According to the perovskite solar cell with the excellent performance and a preparing method thereof, the performance of the perovskite material is effectively used, the photoelectric converting efficiency of the perovskite solar cell is improved to be 17% or above, and the perovskite solar cell is suitable for mass production.

Description

technical field [0001] The invention belongs to the field of perovskite solar cells, in particular to a perovskite solar cell with excellent performance and a preparation method thereof. Background technique [0002] With the rapid development of the economy, human beings' demand for energy is increasing day by day, and the problems of energy and environment have become the focus of the world today. The political and economic relations of the world are closely related to these two issues. At present, sustainable and environment-friendly energy sources are attracting much attention, among which the photovoltaic industry is developing rapidly. However, the current photovoltaic industry is mainly based on crystalline silicon materials, which has the disadvantage of high cost. The photovoltaic industry in various countries mainly relies on government subsidies to promote it. If low-cost solar cells can be produced, it will greatly accelerate the development of the photovoltaic...

AI Technical Summary

Problems solved by technology

The conversion photoelectric efficiency of the battery of the invention is less than 11%

[0006] Chinese invention patent CN 104795501 A discloses a perovskite solar cell and its preparation method. The perovskite solar cell consists of an FTO transparent conductive glass substrate, an electron transport layer, a light absorption layer, a hole transport layer and a metal electrode. The light-absorbing layer is a perovskite material with a two-dimensional layered structure. The invention adopts a spin coating method to prepare a layered perovskite-like light-absorbing layer. The preparation method is simple and the film-forming performance is good. The light-absorbing layer material increases with the number of layers. Change, its band gap is adjustable, and has good chemical stability, the material is exposed to high air humidity (50-80%) for 30 days without chemical decomposition, and still maintains a good layered structure with excellent performance and stable, but its conversion efficiency is relatively low

[0007] The above-mentioned inventions will gradually advance the industrialization of perovskite solar cells. However, mass production is not yet possible.

The main reason is that the conversion efficiency of the current perovskite battery is not high enough, generally below 15%.

In addition, because the current perovskite cells are sensitive to oxygen and defects are easy to form, the stability of perovskite cells is poor. Finding a solar cell structure with higher efficiency and stability is the goal of people's concerted efforts.