InP and CdS Photoanodes in Concentrated Aqueous Iodide Electrolytes

L. F. Schneemeyer, B. Miller

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


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.

Original languageEnglish
Pages (from-to)1977-1981
Number of pages5
JournalJournal of the Electrochemical Society
Issue number9
StatePublished - Sep 1982


  • photo-oxidation
  • potential
  • solar current densities


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