Front cover image: CsPbI3 perovskite stands out as an ideal candidate for the top cell in tandem solar cells, owing to its near-perfect bandgap and impressive heat resistance. However, its optoelectronic performance suffers from the high defect density and substantial recombination losses. In the article, Zhao et al. introduced a molecular structure effect design by using 4-methoxybenzohydrazide (MeOBH) as an additive to regulate crystallinity, suppress non-radiative recombination, and improve interfacial energetic alignment. The resultant inverted solar cells achieve a higher power conversion efficiency and better stability than the control devices.
Zhao et al. (Sun,) studied this question.