Figure 5: Photoelectrochemical properties of an Ir:SrTiO3 film containing Ir metal nanopillars. | Nature Communications

Figure 5: Photoelectrochemical properties of an Ir:SrTiO3 film containing Ir metal nanopillars.

From: Photoelectrochemical water splitting enhanced by self-assembled metal nanopillars embedded in an oxide semiconductor photoelectrode

Figure 5

(a) Cyclic voltammetry scans of Ir(5%):SrTiO3 nanopillar film, measured with and without light irradiation (λ>420 nm, 70 mW cm−2). (b) absorbed photon-to-current efficienc (APCE) and incident photon-to-current efficiency (IPCE) measured at 1.6 V versus reversible hydrogen electrode (RHE), together with the light absorption coefficient plot. The film thickness was 20 nm, the estimated absorbance at 600 nm was 0.4%. The inset shows a photograph of an Ir(5%):SrTiO3 film deposited at 700 °C, 10−3 Torr on a nondoped SrTiO3(001) substrate. Electrolyte: 0.1 M KOH aqueous solution (pH=13.0); sweep rate: 20 mVs−1. The error bars in b assume that the main source of error is the 5% uncertainty in the film thickness.

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