Ideal behavior of the open circuit voltage of semiconductor/liquid junctions

Mary L. Rosenbluth, Nathan S Lewis

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

Using simple bimolecular kinetic expressions for interfacial charge-transfer rates at semiconductor/liquid junctions, the authors present an analysis of the dependence of the open circuit voltage, Voc, on the solution redox potential E(A+/A). It is found that if E(A+/A) is varied by using a series of redox couples with identical heterogeneous rate constants and the concentrations [A] and [A+] are held constant, Voc should change as E(A+/A) is varied. However, if E(A+/A) is manipulated for a given redox system by changing [A+] and holding [A] constant, 'ideal' behavior predicts no change in Voc at different solution redox potentials. These considerations are of importance both in diagnosing the presence of Fermi level pinning at semiconductor electrodes and in the design of photoelectrochemical cells for use in solar energy conversion.

Original languageEnglish
Pages (from-to)3735-3740
Number of pages6
JournalJournal of Physical Chemistry
Volume93
Issue number9
Publication statusPublished - May 4 1989

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Open circuit voltage
open circuit voltage
Semiconductor materials
Liquids
liquids
Photoelectrochemical cells
solar energy conversion
Fermi level
Energy conversion
Solar energy
Charge transfer
Rate constants
charge transfer
Electrodes
Kinetics
electrodes
Oxidation-Reduction
kinetics
cells

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

Cite this

Ideal behavior of the open circuit voltage of semiconductor/liquid junctions. / Rosenbluth, Mary L.; Lewis, Nathan S.

In: Journal of Physical Chemistry, Vol. 93, No. 9, 04.05.1989, p. 3735-3740.

Research output: Contribution to journalArticle

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