Preparation and photoelectrochemistry of p-HgIn/sub 2/Te/sub 4/ and p- and n-CdIn/sub 2/Te/sub 2/

Journal Article · Thu Oct 23 04:00:00 EDT 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100280a080· OSTI ID:6909259

Becker, R S; Zhou, G D; Elton, J

The photoelectrochemical properties of the two p-type title semiconductors were examined in several redox solutions for the first time. For p-HgIn/sub 2/Te/sub 4/, the quantum efficiency for carrier collection (phi/sub c/) is 94% at short circuit, and the monochromatic and polychromatic power efficiencies calculated from the three electrode cell experiments are 9.5% and 3%, respectively, in iron(III) triethanolamine solution with comparably high values in (Cr(III)EDTA)/sup -/. The flat-band potential (V/sub fb/) is at -0.70 V (vs. SCE) in the former two couples, and indirect and direct gap transitions exist at 0.88 and 1.04 eV, respectively. Stability studies indicate essentially 100% stability to photocorrosion in Fe(III)TEA. For p-CdIn/sub 2/Te/sub 4/, phi/sub c/ is also high at short circuit (91%) and the monochromatic power efficiency is even higher (11%) than for p-HgIn/sub 2/Te/sub 4/ while the polychromatic value is somewhat lower (2%); both calculated from three electrode cell experiments. The V/sub fb/ is at approximately -0.5V (vs. SCE), and both an indirect (1.16 eV) and a direct transition exist (1.24 eV). Data for both semiconductors in a polysulfide solution indicate considerably poorer PEC characteristics than for the other redox solutions.

• Research Organization: Univ. of Houston, University Park, TX
• OSTI ID: 6909259
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:22; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
400500* -- Photochemistry
CADMIUM COMPLEXES
CHALCOGENIDES
COMPLEXES
CRYSTAL DOPING
CRYSTAL GROWTH
CURRENTS
DATA
ELECTRIC CURRENTS
ELECTROCHEMICAL CELLS
EQUIPMENT
EXPERIMENTAL DATA
INDIUM COMPOUNDS
INDIUM TELLURIDES
INFORMATION
MATERIALS
MERCURY COMPLEXES
N-TYPE CONDUCTORS
NUMERICAL DATA
P-TYPE CONDUCTORS
PHOTOCURRENTS
PHOTOELECTROCHEMICAL CELLS
SEMICONDUCTOR MATERIALS
SOLAR EQUIPMENT
TELLURIDES
TELLURIUM COMPOUNDS
VOLTAMETRY