Multi-heterojunction interface perovskite solar cell and preparation method thereof

Abstract

The invention discloses a multi-heterojunction interface perovskite solar cell. The multi-heterojunction interface perovskite solar cell adopts a multi-planar-heterojunction interface structure growing vertically and comprises FTO glass, a compact layer, a multi-heterojunction interface layer, a cavity transmission layer and a back electrode. The compact layer is arranged on the FTO glass. The multi-heterojunction interface layer grows vertically on the compact layer in a multi-layer sheet-shaped manner. The back electrode is arranged above the multi-heterojunction interface layer and is located on the cavity transmission layer. The multi-heterojunction interface layer is composed of a plurality of nano-sheets growing vertically and a light absorber filled among the nano-sheets. According to the invention, the multi-planar-heterojunction interface structure growing vertically is adopted, electron and cavity transmission layers are isolated by a light absorption layer, so that the structural defect of interface combination in the electron and cavity transmission process is overcome; in addition, a complete preparation technology, having an industrial potential, of the multi-heterojunction interface perovskite solar cell is provided, and by adopting the technology, the photoelectric conversion efficiency of the solar cell is improved, and industrial production is facilitated.

Description

technical field [0001] The invention relates to a multi-heterojunction interface perovskite solar cell and a preparation method thereof, belonging to the technical field of solar cell manufacturing. Background technique [0002] The energy crisis and environmental pollution are major challenges facing mankind, and the development of new energy and renewable clean energy is one of the most influential technical fields in the 21st century. According to the forecast of the World Energy Council and the International Institute of Applied Analysis, global fossil fuels are not enough to be used for 100 years, and because the CO2 and other gases emitted by fossil fuel combustion increase with the energy consumption index, the ecological balance has been seriously damaged. It has caused a series of problems such as the greenhouse effect and acid rain. Seeking a renewable, pollution-free clean energy has become an urgent task. It is in this form that solar cells are developed. [0...

AI Technical Summary

Problems solved by technology

[0004] Among the above-mentioned types of batteries, the preparation cost of silicon solar cells is relatively high, and the preparation process is relatively complicated. The light-absorbing materials of nanocrystalline solar cells and dye-sensitized solar cells have large exciton binding energy, short exciton diffusion distance and charge-carrying current. However, solar cells based on organometallic halide perovskite materials have attracted widespread attention due to their advantages of high efficiency, simple structure, and low cost, and have become a new research hotspot in the field of solar cells. Broader application prospects

[0005] For perovskite solar cells, there are currently two types of mesoporous and planar structures, which have the structural defects of not separating electrons and holes in space and effectively splitting electron-hole pair heterojunction interfaces.

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