Luminescent photoelectrochemical cells. Use of tellurium-doped cadmium sulfide photoelectrodes to probe surface recombination during the conversion of optical energy to electricity

Journal Article · Tue Jan 02 23:00:00 EST 1979 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00495a048· OSTI ID:6377229

Ellis, A B; Karas, B R

It is reported that photoelectrochemical cells employing n-type Te-doped CdS (CdS:Te) photoanodes provide a sensitive probe of the manner in which the semiconductor excited state partitions input optical energy. Photoelectrochemical events are presumed to result from separation of a photogenerated conduction band electron and valence band hole, a consequence of the band bending which characterizes the depletion region created by the semiconductor-electrolyte interface. The observation of emission in an operating photoelectrochemical cell signifies that the radiative recombination of electron-hole pairs occurs in direct competition with nonradiative separation leading to electrochemistry. It is demonstrated that this competition is sensitive to the electrode potential of the photoelectrochemical cell, which affects band bending.

• Research Organization: Univ. of Wisconsin, Madison
• OSTI ID: 6377229
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 101:1; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ANODES
CADMIUM COMPOUNDS
CADMIUM SULFIDES
CHALCOGENIDES
DATA
DATA FORMS
DEACTIVATION
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTRON EMISSION
ELEMENTS
EMISSION
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
GRAPHS
INFORMATION
INORGANIC PHOSPHORS
LUMINESCENCE
NUMERICAL DATA
PHOSPHORS
PHOTOANODES
PHOTOELECTRIC EMISSION
PHOTOELECTROCHEMICAL CELLS
PHOTOLUMINESCENCE
RECOMBINATION
SEMIMETALS
SULFIDES
SULFUR COMPOUNDS
TELLURIUM