Bandgap Funneling in Bismuth‐Based Hybrid Perovskite Photocatalyst with Efficient Visible‐Light‐Driven Hydrogen Evolution (Small Methods 8/2022)

Back Cover In article number 2200326, Chen, Hsu, and co-workers developed a novel, environmentally friendly mixed halide perovskites MA3Bi2Cl9–xIx with a bandgap funnel structure. Bandgap funneling of lead-free bismuth-based MA3Bi2Cl9–xIx photocatalysts provides an “energy staircase” for electrons and holes, resulting in enhanced charge-carrier separation and efficient photocatalytic redox reaction.