Perovskite thin-film solar cell with three-dimensional ordered mesopore support layer

Abstract

The invention provides a perovskite thin-film solar cell with a three-dimensional ordered mesopore support layer. The perovskite thin-film solar cell with the three-dimensional ordered mesopore support layer comprises a transparent conducting substrate, a compact layer, the three-dimensional ordered mesopore support layer, a perovskite light absorbing layer, a hole transporting layer and a counter electrode layer which are sequentially laminated to form a laminating layer, wherein the three-dimensional ordered mesopore support layer is filled with the perovskite light absorbing layer, the hole transporting layer and the counter electrode layer; the three-dimensional ordered mesopore support layer is of a three-dimensional ordered mesopore material prepared by using water-soluble colloidal crystal microspheres as a template; the aperture dimension of the three-dimensional ordered mesopore support layer depends on the dimension of the water-soluble colloidal crystal microspheres; and the perovskite light absorbing layer is prepared through materials of an ABXmY3-m type crystal structure. The perovskite thin-film solar cell has the advantages that the three-dimensional ordered mesopore support layer of which the aperture is uniform and adjustable, the specific surface area is relatively large and a good electronic transmission channel is arranged is provided and reaches high photoelectric conversion efficiency and outstanding repeatability and stability; and the preparation method has the advantages that the conditions are mild and controllable, the preparation method is simple and needs a little cost, and large-scale commercial production can be popularized.

Description

technical field [0001] The invention relates to the field of organic optoelectronics, in particular to a perovskite thin film solar cell with a three-dimensional ordered mesoporous support layer. Background technique [0002] With the increasing depletion of global oil resources, solar cells have become a frontier subject of extensive research as a feasible method to solve the world's energy crisis. The research and development of solar cells has always been carried out around the following two key issues: 1) Improving photoelectric conversion efficiency and life; 2) Using new materials to reduce costs. So far, the high temperature and high vacuum required in the preparation process of inorganic silicon solar cells make the production cost of inorganic silicon solar cells very high, which greatly limits its application. III-V compound solar cells are prepared from rare elements such as indium selenium. Although the conversion efficiency of solar cells is very high, it is im...

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Problems solved by technology

In 2011, Park et al. further increased the photoelectric conversion efficiency to 6.5% (Nano Lett. 2012, 12, 1863-1867), but the stability of the device was poor

[0009] 1) The surface defects of the dense layer will lead to the formation of recombination centers at the interface, increase the interface contact resistance, and hinder the effective transmission of electrons

[0010] 2) The interface effect and the huge surface tension during perovskite crystallization will cause the perovskite film to crystallize too fast, have poor film-forming properties, and easily form an island phenomenon, resulting in more holes and larger surface roughness in the perovskite layer

[0011] 3) Planar heterojunction perovskite solar cells have poor structural stability and are sensitive to water and oxygen

So far, there are no relevant reports in the literature

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