InP and CdS Photoanodes in Concentrated Aqueous Iodide Electrolytes
Conditions for the efficient photo-oxidation of iodide for both n-CdS and n-InP are demonstrated by theoretical collection properties in rotating ring-disk electrode configurations. A specific I-CdS surface interaction promoting hole transfer kinetics is evidenced by open-circuit potential shifts of illuminated disks with iodide concentration and nearly quantitative disk iodine production at low iodide concentrations. For n-InP, however, high concentrations of CaI2 and control of hydrogen ion levels are both needed to maintain a thin, charge conducting semiconductor-oxide film and adequate kinetics for solution iodide oxidation. Acidified concentrated iodide is the first electrolyte with an n-InP photoanode to handle solar current densities.
MSU Digital Commons Citation
Schneemeyer, Lynn and Miller, Barry, "InP and CdS Photoanodes in Concentrated Aqueous Iodide Electrolytes" (1982). Department of Chemistry and Biochemistry Faculty Scholarship and Creative Works. 90.