“…12 BiOBr and BiOI can respond to visible light, indicating the efficient conversion of solar energy, but BiOI exhibits a faster photocarrier recombination rate than BiOBr. 13 To improve the BiOBr visible light absorption, some strategies have been applied, including controlling the synthesis of BiOBr with specic morphology and structure, 14,15 constructing BiOBr-based composites with other semiconductors, [16][17][18] doping with metal atoms and so on. 19,20 In addition, within ion doping, selfdoping of halogens (Cl, Br, I) is an effective method to strengthen the visible light utilization and overcome the drawback of the high recombination rate of electron-hole pairs.…”