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research article
Photoelectrochemical studies of colloidal titania-films: the charge separation process studied by means of action spectra in the UV region
Charge sepn. in sintered colloidal TiO2 film electrodes was studied by action spectra in SCN-/(SCN)2- the UV region. Electrodes with different film thicknesses were studied. Current generation is most efficient close to the back contact. Monochromatic quantum efficiency of ≤77% and optimum overall quantum efficiency were attained at a colloidal film thickness of ∼4 μm. Illumination through the back side contact gives a theor. quantum efficiency of 100% to a depth of 0.5 μm from the back contact. The origin of the unexpectedly high current generation in the colloidal films was studied.
Type
research article
Authors
Publication date
1992
Published in
Volume
27
Start page
293
End page
304
Subjects
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
July 6, 2015
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