Electrochemical properties of an AgInS₂ photoanode prepared using ultrasonic-assisted chemical bath deposition

Abstract

Electrochemical impedance analysis revealed the hole-transfer step taking place directly from the valence band of AgInS2 photoanode to the electrolyte.

Probing the Crystal Structure, Composition‐Dependent Absolute Energy Levels, and Electrocatalytic Properties of Silver Indium Sulfide Nanostructures

“…Similar observations have been reported by Lee and coworkers [46] for current-potential measurements on AgInS 2 photoanodes prepared by using ultrasonic-assisted chemical-bath deposition. The cathodic current was reportedt oa ppear at ap- ChemPhysChem 2016, 17,1 195 -1203 www.chemphyschem.org proximately À1.2 Vv ersus SCE (À1.4 Vv s. RHE), both in the dark and under illumination,w hich corresponds to the flat band potential determined by using the Mott-Schottky plot.…”

“…The band-structure parameters determinedf rom CV measurements on the orthorhombic phase of AgInS 2 matches well with the data points taken from Ref. [46].…”

“…Figure shows the HOMO–LUMO energy levels determined by using the C2 and A1 peak positions along with the data points from the reported studies by Lee et al . on AgInS 2 photoanodes prepared by using ultrasonic‐assisted chemical bath deposition.…”

“…no C1 peak for curve ei nF igure 4), whichi sa lso in accordance with the XRD pattern recorded fort his material( curve ei n Figure 1), the EDAX analysis, and the corresponding DRS measurements. Figure 5s hows the HOMO-LUMOe nergy levels determined by using the C2 and A1 peak positions along with the data points from the reported studies by Lee et al [46] on AgInS 2 photoanodes prepared by using ultrasonic-assistedc hemical bath deposition. The positions of E ox and E red are taken from CV curvesd epicted in Figure 4( see also Ta ble 2).…”

“…HOMO-LUMOe nergy levels calculatedf rom CV measurements for AIS nanostructures with varying Ag/In molar ratios:0.11, 0.43, 1.0, 2.33, and 9.0. The pink triangles (~)represents HER onset potentialvaluesa tacurrent densityo f2 0mAcm À2 .The blue diamonds (^)indicate data points from Ref [46]…”