Fig. 3

Mechanism of enhanced photothermal conversion efficiency. Theoretical calculations of band structure and density of states (DOS) of a PB, b ZnPB-1, c ZnPB-2 and d ZnPB-3. e Scheme of bandgap-narrowing effect with the increase of Zn-doped density by theory and experiment, and mechanism of enhanced photothermal conversion efficiency with the increase of Zn-doped density. Source data are provided as a Source Data file