Use of porous GaAs electrodes in photoelectrochemical cells

The photoelectrochemical properties of semiconductor‐electrolyte solar cells with carbon auxiliary electrode and colloidal aqueous solution of Na2SiO3 have been investigated. Bulk n‐type single crystalline and nanoporous GaAs material were used as semiconductor electrodes. Current–voltage characteri...

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Bibliographic Details
Published in:Physica status solidi. A, Applications and materials science Applications and materials science, 2005-06, Vol.202 (8), p.1678-1682
Main Authors: Cojocaru, A., Simashkevich, A., Sherban, D., Tiginyanu, I., Ursaki, V., Tsiulyanu, I., Usatyi, I.
Format: Article
Language:English
Subjects:
72.40.+w
81.05.Ea
82.45.Yz
Applied sciences
Energy
Exact sciences and technology
Natural energy
Photovoltaic conversion
Physics
Solar cells. Photoelectrochemical cells
Solar energy
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Summary:The photoelectrochemical properties of semiconductor‐electrolyte solar cells with carbon auxiliary electrode and colloidal aqueous solution of Na2SiO3 have been investigated. Bulk n‐type single crystalline and nanoporous GaAs material were used as semiconductor electrodes. Current–voltage characteristics under different illumination intensities and spectral distribution of the photosensitivity were studied. The photopotential was found to reach values as high as 0.46 V for bulk n‐GaAs. The introduction of porosity in GaAs shifts the maximum of the spectral distribution of photosensitivity towards the longwavelength region and increases the short circuit current by a factor of two. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:1862-6300
0031-8965
1862-6319
1521-396X
DOI:10.1002/pssa.200461223