Ternary chalcogenide-based photoelectrochemical cells - 2. The n-CdIn/sub 2/Se/sub 4//aqueous polysulfide system

Journal Article · Thu Jul 01 00:00:00 EDT 1982 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2124193· OSTI ID:6741922

Tenne, R; Mirovsky, Y; Greenstein, Y; Cahen, D

CdIn/sub 2/Se/sub 4/ is a cross-substitutional analogue of CdSe with an incomplete cation lattice. The n-CdIn/sub 2/Se/sub 4//aqueous polysulfide photoelectrochemical cell is investigated. A selective photoelectrochemical etching of the semiconductor surface leads to a dramatic increase in the photocurrent of the cell (up to 15 mA*cm/sup -2/ at small reverse bias) and greatly improved output stability. The spectral response of the cell reveals a considerable sub-bandgap photocurrent for the etched electrode. This is attributed to excitation via surface states located approximately 0.27 eV within the bandgap. After photoetching the electrode, most of the sub-bandgap response disappears and the response to supra-bandgap excitation increases by at least an order of magnitude that shows that these surface states serve also as recombination centers or traps for the photogenerated holes. 25 refs.

• Research Organization: Weizmann Inst of Sci, Rehovot, Isr
• OSTI ID: 6741922
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 129:7; 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
ELECTRODES
EQUIPMENT
ETCHING
INDIUM COMPOUNDS
INDIUM SELENIDES
INORGANIC PHOSPHORS
PHOSPHORS
PHOTOCURRENTS
PHOTOELECTROCHEMICAL CELLS
RECOMBINATION
SELENIDES
SELENIUM COMPOUNDS
SOLAR EQUIPMENT
SPECTRAL RESPONSE
STABILITY
SULFIDES
SULFUR COMPOUNDS
SURFACE FINISHING