Recently, the team of Assistant Professor Ke Xiao, Professor Yuanyuan Wang, and Professor Hairen Tan at Nanjing University, in collaboration with Renshine Solar, made a major advance in large-area all-perovskite tandem solar modules. By developing a nanocrystal-tailored junction strategy, the researchers achieved a certified power conversion efficiency of 26.2% for a 65 cm² module, independently verified by Japan Electrical Safety & Environment Technology Laboratories (JET), setting a new world record for all-perovskite tandem modules. All-perovskite tandem solar cells are promising for space photovoltaics because of their high efficiency, light weight, and high specific power. Yet their performance on large-area devices has been limited by optical loss, unstable interfaces, metal diffusion, and nonuniform film quality of lead–tin perovskites. The team addressed these challenges through a hole-transport-layer-free tunneling recombination junction, tunable work function of In₂O₃ nanocrystal by self-synthesized surface ligands, and hole-selected material incorporated lead–tin perovskites. The results were published online in Nature on June 15, 2026, under the title “Nanocrystal-tailored junction for all-perovskite tandem solar module”.

Source: https://www.nature.com/articles/s41586-026-10768-1