High Performance III-V Semiconductor/Perovskite Multijunction Solar Cells

High-efficiency photovoltaics can significantly increase the energy conversion efficiency of sunlight, especially for space applications due to sun is the only available energy source. Currently, both silicon solar cells and the new generation of low-cost, solutionprocessed perovskite solar cells have achieved.a power conversion efficiency of over 26%. However, both types of single-junction solar cells are nearing their theoretical Shockley-Queisser (S-Q) efficiency limits. In this project, in collaboration with the hightech enterprise Uniwatt Technology Ltd, which focuses on the research and industrialization of high-end aerospace semiconductor chips, we propose a strategy to develop multi-junction tandem solar cells by integrating a wide-bandgap perovskite cell(1.80-1.90 eV) on top of a narrow-bandgap Ge/lnGaAs (1 .25-1.35 eV) cell, overcoming the S-Q limit of single-junction solar cells. We will adopt a comprehensive strategy to manufacture 111-V semiconductor/perovskite tandem cells with an efficiency of;:: 32%,significantly higher than single-junction solar ·cell technology and representing the highest efficiency for perovskite-based tandem solar cells in space applications. The successful implementation of this project will promote the development of space and satellitephotovoltaic technologies and lay a solid foundation for the future development of highly efficient photovoltaic technologies, supporting the deployment of clean energy in Hong Kong and the Greater Bay Area.