Sunlight engineering efficiency of thin-layer iron-thiazine photogalvanic cells. Evidence that surface-induced back reaction is a key limiting factor
- Boston Univ., MA
Absorption spectra and redox potentials in acid solution limit sunlight engineering efficiency (S.E.E.) of unsensitized iron-thiazine photogalvanic cells to approx. 2%. The highest S.E.E. value obtained with totally illuminated single thin-layer (TI-TL) iron-thionine cells with SnO/sub 2/ anodes and Pt cathodes, .036%, corresponds to V/sub power point/ approx. 35% of theoretical limit. Potentials at the selective anode are dominated by the dye-leucodyne couple. Potentials at the poorly selective cathode are dominated by the iron couple. I/sub sc/ varies linearly with photostationary concentration of leucothionine and with electrode spacing less than or equal to 50 ..mu..m, is not limited by solution lifetime of charge carriers. Inefficient electron transfer at the electrodes is believed to reduce S.E.E. by a factor of approx. 5, possibly because of surface-promoted back reaction on SnO/sub 2/. 18 references.
- DOE Contract Number:
- EY-76-S-02-2889
- OSTI ID:
- 6074270
- Journal Information:
- Adv. Chem. Ser.; (United States), Vol. 173
- Country of Publication:
- United States
- Language:
- English
Similar Records
Photochemical conversion of solar energy. Annual progress report, 1 January--31 Dec 1976. [Iron--thionine and iron--thiozine]
Photochemical conversion of solar energy. Annual progress report, January 1, 1976--December 31, 1976. [Iron--thiazine]
Related Subjects
PHOTOGALVANIC CELLS
EFFICIENCY
ELECTRON TRANSFER
ABSORPTION SPECTRA
ANODES
CATHODES
CHARGE CARRIERS
DYES
IRON COMPOUNDS
PLATINUM
REDOX POTENTIAL
THIONINE
TIN OXIDES
AMINES
CHALCOGENIDES
ELECTROCHEMICAL CELLS
ELECTRODES
ELEMENTS
EQUIPMENT
HETEROCYCLIC COMPOUNDS
METALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTROCHEMICAL CELLS
PLATINUM METALS
SOLAR EQUIPMENT
SPECTRA
TIN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
140505* - Solar Energy Conversion- Photochemical
Photobiological
& Thermochemical Conversion- (1980-)