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. 2018 Jul 16;9:2597. doi: 10.1038/s41467-018-04856-8

Fig. 4.

Fig. 4

Charge transport mechanism in BiVO4. Temperature and light intensity-dependent JV-characteristics of the FTO/BiVO4/probe circuit for PtIr-coated probes (a) and Au-coated probes (b). For high-bias voltages Vs > 0.7 V, the curves show a linear relationship of log(J) and log(V), which corresponds to a power law dependence ∝ Vm. Solid lines are power law fits to the data in the high-bias regime. The extrapolated JV-characteristics for different intensities (temperatures) intersect at the crossover voltage Vc. The power law dependence and the existence of a crossover voltage are signatures of space charge-limited conduction in the BiVO4 film

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