Accession Number : ADA088532


Title :   Luminescent Tellurium-Doped Cadmium Sulfide Electrodes as Probes of Semiconductor Excited-State Deactivation Processes in Photoelectrochemical Cells.


Descriptive Note : Technical rept.,


Corporate Author : WISCONSIN UNIV-MADISON DEPT OF CHEMISTRY


Personal Author(s) : Ellis,Arthur B ; Karas,Bradley R ; Streckert,Holger H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a088532.pdf


Report Date : 12 Aug 1980


Pagination or Media Count : 30


Abstract : 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. (Author)


Descriptors :   *PHOTOCHEMICAL REACTIONS , *ELECTROCHEMISTRY , *ELECTRODES , EMISSION , EXCITATION , INTENSITY , SEMICONDUCTOR DEVICES , CRYSTALS , QUANTUM EFFICIENCY , VALUE , ELECTROLYTES , LUMINESCENCE , ELECTROLYTIC CELLS , CADMIUM SULFIDES , TELLURIUM COMPOUNDS


Subject Categories : Physical Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE