Bilayer perovskite heterojunction tandem solar cells: The future of green energy conversion

This featured letter comprehensively examines the rapidly evolving field of bilayer perovskite heterojunction tandem solar cells. Developing high-efficiency solar cell technologies has become paramount, with a growing emphasis on renewable energy sources. Bilayer perovskite tandem solar cells have emerged as a promising solution, capitalizing on the advantages of perovskite materials and tandem architecture. This featured letter begins by elucidating the fundamental principles underlying bilayer perovskite solar cells, subsequently exploring the design and engineering of heterojunctions within the tandem architecture. It navigates through key advancements in materials synthesis, device fabrication, and optimization strategies, offering insights into the cutting-edge techniques and challenges faced in this burgeoning field. Through a meticulous analysis of the current state-of-the-art and prospects, this article provides an invaluable resource for researchers, scientists, and engineers dedicated to advancing the frontiers of solar cell technology.