Electrochemical photovoltaic cells. Project 65021 quarterly technical progress report, October 15, 1979-January 15, 1980
During the third quarter of this program, liquid junction devices based upon the semiconductors MoSe/sub 2/, MoS/sub 2/, GaAs, and CdSe have been evaluated. Lifetime testing of MoSe/sub 2/ and MoS/sub 2/ materials in acidic halogen electrolytes at constant current densities of 5 mA/cm/sup 2/ have shown excellent stability to date. For MoSe/sub 2/ single crystals in the electrolyte 1M HBr + 1M Br/sub 2/, short-circuit currents of 63 mA/cm/sup 2/ were achieved with a power conversion efficiency of 6.7% for 200 mW/cm/sup 2/ xenon light illumination. Transient potentiostatic measurements made on MoSe/sub 2/ in this electrolyte indicated little diffusion control, with exchange currents being of the order of 1 to 10 mA/cm/sup 2/. Good photoresponse of MoS/sub 2/ has been observed in 1M HBr + 1M Br/sub 2/. The performance of the natural crystal is comparable to the performance of a single-crystal MoS/sub 2/ in this electrolyte. CdSe thermally evaporated onto porous titanium gave efficiencies of about 4% with 100 mW/cm/sup 2/ xenon illumination. Experimental work was initiated on the dye sensitization of Fe/sub 2/O/sub 3/ and TiO/sub 2/ materials. Of the twelve dyes evaluated, little enhancement of the photoresponse of these materials was noted. Solid-state photoelectrochemical cells have been fabricated, based upon LiI. Cells of the configuration - cond. glass CdSe/LiI + PbI/sub 2//LiI/LiI + C + PbI/sub 2//cond. glass - were fabricated. Photoresponses up to 150 mV were observed.
- Research Organization:
- Institute of Gas Technology, Chicago, IL (United States)
- DOE Contract Number:
- EG-77-C-01-4042
- OSTI ID:
- 5197399
- Report Number(s):
- DSE-4042-T26
- Country of Publication:
- United States
- Language:
- English
Similar Records
Electrochemical photovoltaic cells. Project 65021 quarterly technical progress report, April 15-July 15, 1979
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Related Subjects
PHOTOELECTROCHEMICAL CELLS
ELECTRODES
REDOX REACTIONS
CADMIUM SELENIDES
DYES
EFFICIENCY
ELECTROLYTES
GALLIUM ARSENIDES
IRON OXIDES
MOLYBDENUM SELENIDES
MOLYBDENUM SULFIDES
PERFORMANCE
PERFORMANCE TESTING
PHOTOANODES
RESEARCH PROGRAMS
SEMICONDUCTOR MATERIALS
TITANIUM OXIDES
ANODES
ARSENIC COMPOUNDS
ARSENIDES
CADMIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
ELECTROCHEMICAL CELLS
EQUIPMENT
GALLIUM COMPOUNDS
IRON COMPOUNDS
MATERIALS
MOLYBDENUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
SELENIDES
SELENIUM COMPOUNDS
SOLAR EQUIPMENT
SULFIDES
SULFUR COMPOUNDS
TESTING
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
140505* - Solar Energy Conversion- Photochemical
Photobiological
& Thermochemical Conversion- (1980-)