Luminescent tellurium-doped cadmium sulfide electrodes as probes of semiconductor excited-state deactivation processes in photoelectrochemical cells. Technical report

Technical Report · Tue Aug 12 04:00:00 EDT 1980

OSTI ID:6620113

Ellis, A B; Karas, B R; Streckert, H H

Correlations between quantum efficiencies for photocurrent (phi (x)), emission (phi r), and nonradiative recombination (phi (nr)) are discussed with reference to data from single-crystal, n-type, 100 and 1000 ppm CdS:Te-based photoelectrochemical cells (PECs) employing aqueous sulfide electrolyte. These materials emit while they serve as PEC electrodes. The assumption that the proportionality of phi (r) to phi (nr) is unaffected by potential leads to a simple expression relating phi (x) to phi (r) for monochromatic excitation. Calculated and observed emission data are in reasonable agreement; sources of deviation are discussed. Polychromatic excitation is shown to yield photocurrent and emission intensity which is approximately a weighted average of the values obtained with the constituent monochromatic frequencies. Practical implications of the phi (x) correlation with phi (r) are described, as are related results from other PECs.

• Research Organization: Wisconsin Univ., Madison (USA). Dept. of Chemistry
• OSTI ID: 6620113
• Report Number(s): AD-A-088532
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
CADMIUM COMPOUNDS
CADMIUM SULFIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CRYSTALS
EFFICIENCY
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYTES
ELEMENTS
EMISSION
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
EXCITATION
INORGANIC PHOSPHORS
LUMINESCENCE
PHOSPHORS
PHOTOCHEMICAL REACTIONS
PHOTOELECTROCHEMICAL CELLS
QUANTUM EFFICIENCY
RECOMBINATION
SEMICONDUCTOR DEVICES
SEMIMETALS
SOLAR EQUIPMENT
SULFIDES
SULFUR COMPOUNDS
TELLURIUM