1. Surface‐Modified p ‐ InP Photocathodes in Sulfide/Polysulfide Electrolyte
- Author
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Chin‐hsin J. Liu, Anthony F. Sammells, and Peter G. P. Ang
- Subjects
chemistry.chemical_classification ,Materials science ,Sulfide ,Renewable Energy, Sustainability and the Environment ,Inorganic chemistry ,Halide ,Electrolyte ,Photoelectrochemical cell ,Condensed Matter Physics ,Cobalt sulfide ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Electrochemical cell ,chemistry.chemical_compound ,chemistry ,Electrode ,Materials Chemistry ,Electrochemistry ,Polysulfide - Abstract
A chemical procedure is reported to modify the semiconductor surface which results in an efficient p-InP/S/sup 2-/,Sx/sup 2-/ photoelectrochemical cell. The procedure is as follows: The p-InP electrode was initially etched in 12M HCl for 1-2 minutes, followed by immersion in polysulfide solution (1M Na/sub 2/S+1M/sub 2/S or 2.5M Na/sub 2/s+1M S+1M NaOH. To the polysulfide-wetted surface of the p-InP, a drop of 0.2M CoCl/sub 2/ was added. A black precipitate of cobalt sulfide was immediately formed, the majority of which was rinsed off with deionized water. 7 refs.
- Published
- 1982
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