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 language | English |
|---|---|
| Pages (from-to) | 3735-3740 |
| Number of pages | 6 |
| Journal | Journal of Physical Chemistry |
| Volume | 93 |
| Issue number | 9 |
| Publication status | Published - May 4 1989 |
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ASJC Scopus subject areas
- Engineering(all)
- Physical and Theoretical Chemistry
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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 journal › Article
}
TY - JOUR
T1 - Ideal behavior of the open circuit voltage of semiconductor/liquid junctions
AU - Rosenbluth, Mary L.
AU - Lewis, Nathan S
PY - 1989/5/4
Y1 - 1989/5/4
N2 - 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.
AB - 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.
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M3 - Article
AN - SCOPUS:0024961091
VL - 93
SP - 3735
EP - 3740
JO - Journal of Physical Chemistry
JF - Journal of Physical Chemistry
SN - 0022-3654
IS - 9
ER -