Photo-Oxidation of Cu(l) at n-lnP in Concentrated Chloride

Lynn Schneemeyer, J. M. Rosamilia, B. Miller

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Photoanodes of n-type semiconductors with solar matched bandgaps are generally difficult to stabilize in conventional aqueous redox electrolytes. The use of highly concentrated electrolytes which reduce water activity in the design of photoelectrochemical systems has been an attractive strategy. Modification of the kinetics and energetics of selected electrode reactions in these media can lead to enlarging the redox potential range of stability and enhancement of power conversion efficiency. The Cu(I)-Cu(II) couple in concentrated chloride media is of interest because of its reversible behavior, favorable shift of potentials with increasing ligand (chloride) concentration, and effective competition to InP oxidation. Rotating ring-disk electrode voltammetry has been used to demonstrate efficient hole transfer from n-InP to Cu(I) in saturated CaCl2electrolyte and singular increase in operating lifetime over that of conventional aqueous (0.5M CaCl2) media. The spectral and transport properties of the electrolyte system have been measured. Open-circuit voltages above 600 mV for the n-InP/Cu(I)-Cu(II)-saturated CaCl2/C cell are readily attainable for solar intensities.

Original languageEnglish
Pages (from-to)2767-2771
Number of pages5
JournalJournal of the Electrochemical Society
Volume134
Issue number11
DOIs
StatePublished - 1 Jan 1987

Fingerprint

Photooxidation
photooxidation
Electrolytes
Chlorides
chlorides
electrolytes
Electrodes
n-type semiconductors
electrodes
Open circuit voltage
Voltammetry
open circuit voltage
Transport properties
Conversion efficiency
Energy gap
transport properties
Ligands
Semiconductor materials
life (durability)
Oxidation

Cite this

Schneemeyer, Lynn ; Rosamilia, J. M. ; Miller, B. / Photo-Oxidation of Cu(l) at n-lnP in Concentrated Chloride. In: Journal of the Electrochemical Society. 1987 ; Vol. 134, No. 11. pp. 2767-2771.
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Photo-Oxidation of Cu(l) at n-lnP in Concentrated Chloride. / Schneemeyer, Lynn; Rosamilia, J. M.; Miller, B.

In: Journal of the Electrochemical Society, Vol. 134, No. 11, 01.01.1987, p. 2767-2771.

Research output: Contribution to journalArticle

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