Influence of lanthanum-doping on the Photochemical properties of SrTiO3 polycrystalline anodes
1984
A series of Sr1−xLaxTiO3 (0 < x < 0.015) ceramics were prepared and evaluated as semiconducting anodes in the photoassisted electrolysis of water. We report on subband-gap photoresponse for La-doped samples due to electron transfer via deep donor and acceptor intraband-gap centers associated with structural defects. A tailing of the band-gap absorption due to energy states near the band edges gives rise to an increase of the flat-band potential and a decrease of the optical band-gap.
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