Alloying Sb into all inorganic lead-free CsBi3I10 for improving the crystal growth and photovoltaic performance

The incorporation of isovalent Sb 3+ into all inorganic lead-free CsBi 3 I 10 leads to the improved crystal growth and reduced bandgaps. Solar cells based on Cs(Bi 0.7 Sb 0.3 ) 3 I 10 yield a champion PCE of 1.54% with a high V oc of 0.81 V.