Luminescent photoelectrochemical cells - 7. Photoluminescent and electroluminescent properties of cadmium sulfo-selenide electrodes

Journal Article · Thu Apr 01 04:00:00 EST 1982 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2123969· OSTI ID:6741908

Streckert, H H; Tong, J; Carpenter, M K; Ellis, A B

Samples of single crystal, n-type CdS/sub x/Se/sub 1-x/ (x.1.00, 0.74, 0.49, 0.11, 0.00) emit when excited with ultra-bandgap excitation. The 295 K bandgaps monotonically decrease with x from approximately 2.4 ev for CdS to approximately 1.7 ev for CdSe. Photoluminescence (PL) spectra are sharp and have band positions which vary nearly linearly with composition: /lambda/sub //m/sub ax/(nm)/congruent/718-210x. The energetic proximity to the bandgap, temperature dependence, and decay times are all consistent with a description of the PL as edge emission. Measured PL efficiencies, /phi/sub //r, are approximately 10/sup -4/ in air. When the samples are used as photoanodes in photoelectrochemical cells (PEC's) employing aqueous polysulfide electrolyte, the emission intensity can be quenched by the passage of photocurrent. The extent of quenching can be correlated with the photocurrent quantum efficiency. 25 refs.

• Research Organization: Univ of Wis, Madison, USA
• OSTI ID: 6741908
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 129:4; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
CADMIUM COMPOUNDS
CADMIUM SELENIDES
CADMIUM SULFIDES
CHALCOGENIDES
CURRENTS
ELECTRIC CURRENTS
ELECTROCHEMICAL CELLS
ELECTROLUMINESCENCE
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LUMINESCENCE
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PHOTOLUMINESCENCE
QUENCHING
SELENIDES
SELENIUM COMPOUNDS
SOLAR EQUIPMENT
SULFIDES
SULFUR COMPOUNDS