Photogalvanic cells driven by electron transfer quenching of excited singlet states. Final technical report

Technical Report · Sat Jan 01 00:00:00 EST 1983

OSTI ID:5260692

Creed, D; Fawcett, N C

Photoreduction of oxonine by iron(II) sulfate in dilute acid is produced by quenching of the excited singlet state (S/sub 1/). No induced intersystem crossing to the tripolet (T/sub 1/) can be observed by nanosecond flash photolysis. The photoreduction of oxonine (S/sub 1/) by iron(II) has been used in a totally illuminated thin layer photogalvanic cell. Power conversion efficiencies are, however, very low. The fluorescence of oxonine and thiazine dyes such as thionine is quenched by acids. Oxonine fluorescence is also quenched by hydroquinone and catechol sulfonates and related compounds. Eleven new thiazine dyes have been synthesized. A few photogalvanic experiments have been carried out using high concentrations (> 10/sup -2/N) of the water miscible dye and iron(II) in a TI/TL cell. Ferrophos, an iron-phosphorus alloy, can be substituted for platinum or gold as a cathode in photogalvanic cells.

• Research Organization: University of Southern Mississippi, Hattiesburg (USA)
• DOE Contract Number: FG02-79ER10534
• OSTI ID: 5260692
• Report Number(s): DOE/ER/10534-3; ON: DE84009099
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DYES
PHOTOLYSIS
SYNTHESIS
PHOTOGALVANIC CELLS
CATHODES
EXCITED STATES
FLUORESCENCE
IRON SULFATES
SCINTILLATION QUENCHING
CHEMICAL REACTIONS
DECOMPOSITION
ELECTROCHEMICAL CELLS
ELECTRODES
ENERGY LEVELS
EQUIPMENT
IRON COMPOUNDS
LUMINESCENCE
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOELECTROCHEMICAL CELLS
SOLAR EQUIPMENT
SULFATES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
140501* - Solar Energy Conversion- Photovoltaic Conversion
400500 - Photochemistry