Fig. 4: Complex dielectric functions and spectral weight transfer of BiVO4 films with W doping. | NPG Asia Materials

Fig. 4: Complex dielectric functions and spectral weight transfer of BiVO4 films with W doping.

From: Unravelling a new many-body large-hole polaron in a transition metal oxide that promotes high photocatalytic activity

Fig. 4

a Imaginary part of the complex dielectric functions, ε2(ω), of BiVO4 with 0%, 0.5% and 1% W doping. b Imaginary part of the complex dielectric functions, ε2(ω), of BiVO4 with 1%, 2% and 5% W doping. c Real part of the complex dielectric functions, ε1(ω), of BiVO4 with 0%, 1 and 5% W doping. d Optical energy positions of all transitions at the band edge as a function of W doping. The inset indicates the O 2p to V 3d transition, which is the direct band transition of all samples. e The spectral weight change as a function of W doping for the polaron peak and regions II and III.

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