Organic and inorganic hybrid perovskite-based solar cell and method for manufacturing same

Abstract

The invention relates to an organic and inorganic hybrid perovskite-based solar cell and a method for manufacturing the same. The organic and inorganic hybrid perovskite-based solar cell comprises a substrate, a transparent electrode, an electron transport layer, an ultrathin orientation layer, a perovskite light absorption layer, a hole transport layer and a counter electrode. The transparent electrode, the electron transport layer, the ultrathin orientation layer, the perovskite light absorption layer, the hole transport layer and the counter electrode are sequentially stacked on the substrate. The method includes modifying micro-nano structures on the surfaces of the electron transport layer or the hole transport layer to form the ultrathin orientation layer before the perovskite light absorption layer is manufactured by the aid of a liquid phase process. The organic and inorganic hybrid perovskite-based solar cell and the method have the advantages that orientated growth of crystals of perovskite is controlled under large-ring structural effects of molecules in the ultrathin orientation layer, accordingly, the crystallization regularity can be improved, and internal defects can be reduced; the diffusion lengths of current carriers inside the perovskite light absorption layer can be effectively increased, accordingly, recombination of electron-hole pairs on the inside and interfaces of the perovskite light absorption layer can be prevented, and the photoelectric conversion efficiency and the stability of the cell can be obviously improved; the crystallization quality of the perovskite light absorption layer cannot be easily affected by film forming conditions under the orientation mold plate effects of the ultrathin orientation layer, accordingly, the device manufacturing repeatability can be improved, and the low-temperature solution method is applicable to industrially producing large-area perovskite solar cells.

Description

technical field [0001] The invention relates to the technical field of perovskite-based thin-film solar cells, in particular to an organic-inorganic hybrid perovskite-based solar cell and a preparation method thereof. Background technique [0002] Organic-inorganic hybrid perovskite-based solar cells have shown excellent optoelectronic performance and great potential in recent years. With the development of perovskite solar cell technology, the photoelectric conversion efficiency of cell devices based on this light-absorbing material is as high as 19.3%. [0003] The crystallization quality of the perovskite light-absorbing layer and its interface control with the electrode modification layer are crucial to the photoelectric performance of the battery, directly affecting the conversion efficiency and stability of the battery. The preparation methods of perovskite light-absorbing layer mainly include liquid phase method, gas phase assisted liquid phase method, gas phase co-e...

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Problems solved by technology

[0004] In the existing perovskite-based solar cell structure, the perovskite light-absorbing layer is generally deposited directly on the surface of the electrode modification layer (such as TiO 2 , ZnO, PEDOT:PSS and other surfaces), due to the PbI 2 and CH 3 NH 3 I rapidly self-assemble into nano-scale perovskite tiny grains during the coating process. It is difficult to control the nucleation of perovskite grains and the growth direction of the film layer. The den...

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