(a) Energy band diagram of the Au/Cs₂AgBiBr₆/Au structure, showing the generation, transfer, and collection processes of the photogenerated carriers. (b) Spectral responses of the Cs₂AgBiBr₆ thin-film photodetector. (c) I–V curves of the photodetector under light with different illumination powers. (d) Logarithmic plot of photocurrent versus illumination power. (e) Photoresponsivity and (f) specific detectivity and EQE of the photodetector versus light illumination power.^[105]