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Photoelectrochemical Properties of Donor Doped $BaTiO_3$ Electrodes

Kutty, TRN and Devi, Gomathi L (1985) Photoelectrochemical Properties of Donor Doped $BaTiO_3$ Electrodes. In: Materials Research Bulletin, 20 (7). pp. 793-801.

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The photoelectrochemical behaviour of donor-doped $BaTiO_3$ ceramic anodes has been investigated in comparison with that of $H_2$-reduced $BaTiO_3$ and $SrTiO_3$. Donor-doped $BaTiO_3$ has response to visible light without mechanical polishing and is unaffected by chemical etching or etching followed by polishing. $H_2-BaTiO_3$ also has photoresponse in the visible; it is, however, modulated by mechanical polishing. Whereas, $H_2-SrTiO_3$ has response in visible light, only on mechanical polishing. The visible photoresponse of $BaTiO_3$ is due to the mid-band gap states arising from lattice defects such as $Ti^{3+}-V_O$ and Ba-vacancies. The differences between $BaTiO_3$ and $SrTiO_3$ is explained in terms of the changed characteristics of $V_{Ba(Sr)}$-energy states.

Item Type: Journal Article
Publication: Materials Research Bulletin
Publisher: Elsevier
Additional Information: Copyright of this article belongs to Elsevier BV.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 25 Jun 2008
Last Modified: 19 Sep 2010 04:46
URI: http://eprints.iisc.ac.in/id/eprint/14674

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