Performance and stability gain in zero-dimensional perovskite solar cells after >2 years when hybridized with silicon nanocrystals.

We report highly stable zero-dimensional (CH 3 NH 3 ) 3 Bi 2 I 9 photovoltaic cells which demonstrate a 33% increase in performance after 2 years when hybridized with silicon nanocrystals (SiNCs). The natural oxidation of SiNCs is expected to consume radical species and improve the SiNC/(CH 3 NH 3 ) 3 Bi 2 I 9 interface and electronic coupling whilst also inhibiting defect-induced degradation.