We are pleased to announce our latest research advancement demonstrating, for the first time, the successful monolithic integration of an all-inorganic perovskite top cell into a perovskite/perovskite/silicon triple-junction solar cell. In this work, we report the fabrication of CsPbI₂Br perovskite films using thermal co-evaporation at room temperature, completely eliminating the need for any post-deposition annealing treatment. The resulting films exhibited a bandgap of 1.88 eV and showed remarkable photostability, with no signs of halide segregation even after 3 hours of continuous light exposure. The fully integrated triple-junction device achieved a stabilized power conversion efficiency of 21%, improving to 22% under ambient conditions and without encapsulation. This study marks a critical step toward the scalable, solvent-free fabrication of multi-junction solar cells and sets the stage for further development of industrial-grade, ultra-efficient photovoltaic technologies.
👉 For more information, read the full article: http://doi.org/10.1002/pip.3923
The Borchert Lab 