Abstract
AbstractA simple procedure for the fabrication of fairly efficient polycrystalline CdS electrodes from CdS powders is described (by coating a thin film of a paste formed with an aqueous solution of a surfactant and ZnCl2 on a Ti substrate and sintering at 670°C in Ar). Light conversion efficiencies of these thin film (‐20 μm) electrodes have been tested in two regenerative solar cells (with Fe(CN)63‐/4‐ and polysulfide redox systems) and ζsolar and ζ490nm have been found to be 0.37% and 4.4%, respectively for the former. The onset of the photoresponse was λ 520 nm with maximum efficiency at λ = 490 nm (2.53 eV). Photoelectrochemical cells of the type CdS/reductant//water/Pt for the visible light induced H2 generation from water have also been assembled and were found to produce H2 with a quantum yield of 5–16%.
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