Luminescent photoelectrochemical cells. 6. Spatial aspects of the photoluminescence and electroluminescence of cadmium selenide electrodes. Technical report

Technical Report · Tue Oct 06 04:00:00 EDT 1981

OSTI ID:5439431

Streckert, H H; Tong, J; Ellis, A B

The study of interfacial charge-transfer processes at semiconductor electrodes is under active investigation, as befits the semiconductor's role as the key element of photoelectrochemical cells (PECs). We have recently reported the use of luminescence as a tool for examining charge-transfer events occurring at n-type CdS and CdS:Te (Te-doped CdS) electrodes. Photoluminescence was studied while these electrodes served as photoanodes in PECs employing polychalcogenide electrolytes; under certain conditions photoluminescence could be initiated by using the semiconductors as dark cathodes in alkaline, peroxydisulfate media. Photoluminescence (PL) and electroluminescence (EL) represents two methods for populating the excited-state manifold of CdSe. PL studies, to be described first, were conducted in air and in a PEC. These experiments aid in the assignment of the emissive transition and detail its spectral distribution, efficiency, and perturbation by the passage of current in a PEC. Subsequently, we discuss the analogous EL characteristics of spectral distribution, efficiency and potential dependence. Implications of comparisons of PL and EL properties are also discussed in this section. In the final section we describe the effects of various surface treatments on the PL properties of CdSe.

• Research Organization: Wisconsin Univ., Madison (USA). Dept. of Chemistry
• OSTI ID: 5439431
• Report Number(s): AD-A-107580/3
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
ANODES
CADMIUM COMPOUNDS
CADMIUM SELENIDES
CHALCOGENIDES
CHARGE EXCHANGE
CHEMICAL REACTIONS
CHEMISTRY
CONVERSION
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTRODES
ELECTROLUMINESCENCE
ENERGY CONVERSION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
EXCITATION
INTERFACES
LUMINESCENCE
OPTICAL PROPERTIES
PHOTOANODES
PHOTOCHEMICAL REACTIONS
PHOTOELECTROCHEMICAL CELLS
PHOTOLUMINESCENCE
PHYSICAL PROPERTIES
PROCESSING
SELENIDES
SELENIUM COMPOUNDS
SOLAR EQUIPMENT