Abstract:
To achieve green and sustainable development, reducing CO
2 emissions, it is deemed necessary to continue to promote and develop clean energy technologies, such as photovoltaics solar cell technology. Among of photovoltaic technologies, the organic-inorganic hybrid perovskite solar cells have the characteristics of low-cost, light weight, and simple manufacturing, which are more suitable for the requirements of future development. Perovskite materials are direct bandgap semiconductors with adjustable bandgap, which have lower exciton binding energy, longer carrier lifetime and diffusion length, and higher defect tolerance. The current maximum efficiency has exceeded 25%. However, the inherent instability of the material and sensitivity to environmental factors, such as water, heat, oxygen, and ultraviolet light, have become the primary problems limiting its further development. Recently, two-dimensional (2D) halide perovskite has attracted the attention of researchers around the world due to its ultra-high humidity stability. However, the efficiency of two-dimensional halide perovskite cells is still far behind that of traditional three-dimensional halide perovskite cells. Therefore, improving the efficiency of solar cells while maintaining excellent stability is a key problem in the research of 2D perovskite solar cells. In this paper, we mainly focus on the 2D halide perovskite film preparation and device structure, as well as efficiency and stability, and other issues to provide guidance for the development of efficient and stable 2D halide perovskite solar cells.