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Application of the Gartner model to elucidate parameters adversely affecting photoactivity of thin film PbO in Fe(CN)(6)(3-/4-) electrolyte

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Title Application of the Gartner model to elucidate parameters adversely affecting photoactivity of thin film PbO in Fe(CN)(6)(3-/4-) electrolyte
 
Creator MUKHOPADHYAY, I
SHARON, M
 
Subject lead-oxide film
alkaline-solution
photoelectrochemical properties
oxidation
electrosynthesis
anode
lead oxide photoanode
anodic oxide of pb
photoelectrochemical properties of pbo
gartner method in pbo
semiconducting properties of pbo
 
Description A photoactive alpha-PbO phase is synthesized by potentiodynamic anodization of lead (in alkaline medium) in the potential region of -0.75 V to 1.25 V (vs Hg/HgO). The oxide electrode formed after 18 min of anodization shows an energy conversion efficiency of 0.9% with an open circuit voltage of 800 mV and short circuit current of 2.2 mA cm(-2). Mott-Schottky measurement shows that the flat band potential of this photoanode is -0.54 V (vs Hg/HgO) with a donor concentration of 1.14 x 10(16). The influence of variation in space charge layer width, diffusion length and absorption coefficient on the photoactivity of PbO is studied using the Gartner model. It is concluded that low conversion efficiency of the PbO film is due to formation of a small depletion region (3680 Angstrom) and a large diffusion region (2443 Angstrom) as compared to a very large 1/alpha value (14084 Angstrom) at 500 nm. Copyright (C) 1996
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2011-08-23T14:42:39Z
2011-12-26T12:56:29Z
2011-12-27T05:45:17Z
2011-08-23T14:42:39Z
2011-12-26T12:56:29Z
2011-12-27T05:45:17Z
1997
 
Type Article
 
Identifier ELECTROCHIMICA ACTA, 42(1), 67-72
0013-4686
http://dx.doi.org/10.1016/0013-4686(96)00167-3
http://dspace.library.iitb.ac.in/xmlui/handle/10054/10549
http://hdl.handle.net/10054/10549
 
Language en