A kind of multi-heterojunction interface perovskite solar cell and preparation method thereof

Abstract

The invention discloses a multi-heterojunction interface perovskite solar cell, which adopts a vertically grown multi-planar heterojunction interface structure, including FTO glass, a dense layer, a multi-heterojunction interface layer, a hole transport layer, and a back surface. An electrode; a dense layer is arranged on the FTO glass, and the multi-heterojunction interface layer grows on the dense layer in a multi-layer upright sheet shape, and the back electrode is arranged above the multi-heterojunction interface layer and is located on the hole transport layer; The multi-heterojunction interface layer is composed of a plurality of vertically grown nanosheets and light absorbers filled between the nanosheets. Since the present invention adopts the vertically grown multi-plane heterojunction interface structure, the electron and hole transport layer is separated by the light absorbing layer, which overcomes the structural defect of interfacial recombination of electrons and holes during the transport process; provides a complete The preparation process of multi-heterojunction interface perovskite solar cells with industrialization potential can improve the photoelectric conversion efficiency of solar cells and is conducive to industrial production.

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, the global fossil fuels will not be used for 100 years, and, due to the CO emissions from fossil fuel combustion 2 Gases such as gas increase with the energy consumption index, which has seriously damaged the ecological balance. 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. ...

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.

Images