Nature Energy, Published online: 10 September 2026; doi:10.1038/s41560-026-02135-1

Ultrawide-bandgap perovskites suffer from heterogeneities during crystallization. Zhang et al. use solvent and additive engineering to smooth the process for 2.0-eV bandgap perovskites, enabling 30.1% efficiency in all-perovskite triple-junction solar cells.

Nature Energy, Published online: 24 July 2026; doi:10.1038/s41560-026-02116-4

The interconnected recombination layer is key to advance perovskite/silicon tandem solar cells. Cao et al. show that titanium oxynitride reconciles the requirements for recombination layers, improving the efficiency and stability for tandem solar cells and modules.

Nature Energy, Published online: 14 July 2026; doi:10.1038/s41560-026-02093-8

Vacuum-processed perovskite solar cells show promise, yet their efficiency remains limited. Xu et al. use formamidinium acetate to promote perovskite crystallization, achieving a 25.5% power conversion efficiency and 1,000 h operational stability.