Sensitized photoelectrolysis of water with sunlight. Final report, June 1, 1977-December 31, 1978
A study was made of solar driven water photoelectrolysis cells employing semiconductor electrodes. An extensive review of the literature was undertaken, and the three major problem areas for these devices were identified: corrosion, poor sunlight absorption, and external bias requirement. Although many semiconductors had been tested, none had proven free of all three defects. Two approaches were thus followed for the experimental studies: impurity sensitization of wide band gap stable oxides, and heterostructure formation between unstable sunlight absorbers and corrosion resistant oxides. Water decomposition was achieved with visible light excitation of Cr-doped TiO/sub 2/. Transport properties were studies for TiO/sub 2/ and SrTiO/sub 3/ electrodes doped with V, Cr, Mn, Fe, Co, and Ni. The correlation between bias requirement and electron affinity of oxides was identified. Performance of heterostructure electrodes was shown to be limited either by pin hole problems or by potential barriers between the valence bands.
- Research Organization:
- Exxon Research and Engineering Co., Linden, NJ (USA). Government Research Lab.
- DOE Contract Number:
- EG-77-C-02-4271
- OSTI ID:
- 5624377
- Report Number(s):
- COO-4271-6
- Country of Publication:
- United States
- Language:
- English
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Photoelectrolysis of water in sunlight with sensitized semiconductor electrodes
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Related Subjects
08 HYDROGEN
HYDROGEN PRODUCTION
PHOTOELECTROLYSIS
PHOTOELECTROLYTIC CELLS
ELECTRODES
PERFORMANCE
TECHNOLOGY ASSESSMENT
AFFINITY
CADMIUM SELENIDES
CADMIUM SULFIDES
CORROSION
DATA
DYES
ELECTRIC CONDUCTIVITY
ENERGY GAP
EXPERIMENTAL DATA
FABRICATION
GRAPHS
IMPURITIES
PERFORMANCE TESTING
RECOMBINATION
RESEARCH PROGRAMS
SEMICONDUCTOR JUNCTIONS
SEMICONDUCTOR MATERIALS
SENSITIZERS
SPACE CHARGE
SPECTRAL RESPONSE
STRONTIUM OXIDES
TABLES
TITANIUM OXIDES
WATER
ALKALINE EARTH METAL COMPOUNDS
CADMIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA FORMS
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTROLYSIS
ELECTROLYTIC CELLS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC PHOSPHORS
JUNCTIONS
LYSIS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOSPHORS
PHOTOELECTROCHEMICAL CELLS
PHYSICAL PROPERTIES
REAGENTS
SELENIDES
SELENIUM COMPOUNDS
STRONTIUM COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
TESTING
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
140505* - Solar Energy Conversion- Photochemical
Photobiological
& Thermochemical Conversion- (1980-)
080101 - Hydrogen- Production- Electrolysis