Photoelectrochemistry of the CuInS2/Sn2- system

Yehudit Mirovsky, David Cahen, Gary Hodes, Reshef Tenne, Witold Giriat

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

Single crystal and thin film polycrystalline samples of n-CuInS2 were studied as photoanodes in a polysulfide electrolyte-based photoelectrochemical cell. The I-V plots in the dark and under illumination show a strong dependence on the electronic properties of the electrode, explaining the large variations in photoelectrochemical behaviour of different electrodes. Short-circuit photocurrent spectra show a strong temperature dependence as do the I-V plots under illumination. The output stability of the electrodes depends both on electrolyte composition and temperature, and reaches a constant value after a period of some minutes-hours, depending on electrolyte composition. The flat-band potential in polysulfide solution, as derived from a plot of the square of the photocurrent vs. applied potential, is similar to that for Cd-chalcogenide photoelectrodes in this electrolyte, indicating possible pinning of the semiconductor bands by adsorbed sulfide, or by a surface or near-surface layer. Information on the effective hole diffusion length is obtained from analysis of monochromatic I-V curves.

Original languageEnglish
Pages (from-to)169-177
Number of pages9
JournalSolar Energy Materials
Volume4
Issue number2
DOIs
StatePublished - 1981
Externally publishedYes

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