Quantum efficiency of Cu2O electrode in photoelectrochemical cells with and without bias

K.A. Khan, Y.K. Leung and J.F. Kos

Renewable Energy, 1997, vol. 11, issue 3, 293-298

Abstract: The photoresponse of a p-type Cu2O film on copper is presented. The current-voltage characteristics exhibit a large photocurrent with an onset potential at ca. −0.2 V (S.C.E.). The electrode in the Cu2O/Pt biased cell shows high quantum efficiency which is approaching 100% for wavelength λ ≈ 300 nm. Studies show that even for potentials just slightly more negative than Von, the quantum efficiency is relatively large. This result may be explained either by a current doubling phenomena or could be due to a contribution to additional band gaps which may exist at higher energies. The overall high quantum efficiencies, moreover, can be obtained without the use of any external bias if a TiO2 counter electrode is used.

Date: 1997
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:11:y:1997:i:3:p:293-298

DOI: 10.1016/S0960-1481(96)00132-2

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