Thermal manipulation of deactivation processes in luminescent photoelectrochemical cells employing tellurium-doped cadmium sulfide photoelectrodes. Technical report

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

OSTI ID:6135781

Karas, B R; Morano, D J; Bilich, D K; Ellis, A B

Temperature significantly modifies the efficiencies of luminescence and photocurrent in an n-type, single crystal, CdS:Te-based photoelectrochemical cell (PEC) employing aqueous polyselenide electrolyte. Between 20 and 100 C photocurrent (quantum yield phi sub x) from ultraband gap 501.7 nm excitation increases modestly by less than or = 20%, whereas photocurrent from bandgap edge 514.5 nm excitation increases by about an order of magnitude, reaching 50-100% of the 20 C 501.7 nm photocurrent. Undoped CdS exhibits a similar photocurrent-temperature profile. Higher temperatures thus extend the wavelength response of CdS- and CdS:Te-based PEC's. In contrast to the increase in photocurrent, emissive efficiency (quantum yield phi sub r) of CdS:Te drops by a factor of approximately 10-20 over the same temperature range; this decline is relatively insensitive to potential and excitation wavelength (501.7 or 514.5 nm).

• Research Organization: Wisconsin Univ., Madison (USA). Dept. of Chemistry
• OSTI ID: 6135781
• Report Number(s): AD-A-089217
• 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
DEACTIVATION
EFFICIENCY
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROLYTES
EQUIPMENT
INORGANIC PHOSPHORS
LUMINESCENCE
MATERIALS
N-TYPE CONDUCTORS
PHOSPHORS
PHOTOELECTROCHEMICAL CELLS
PHOTOLUMINESCENCE
PROCESSING
QUANTUM EFFICIENCY
SELENIDES
SELENIUM COMPOUNDS
SEMICONDUCTOR MATERIALS
SOLAR EQUIPMENT
SULFIDES
SULFUR COMPOUNDS
TELLURIDES
TELLURIUM COMPOUNDS
TEMPERATURE EFFECTS
ZINC COMPOUNDS