Photoelectrochemical reduction of a Cu(I) complex to copper metal by hot electrons at p-InP

Journal Article · Wed Mar 15 04:00:00 EST 1989 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00188a009· OSTI ID:5852363

Koval, C A; Segar, P R

The chemically irreversible reduction of copper(I) (trans-diene)/sup +/ to copper metal has been used to confirm the existence of hot-electron processes at the p-InP/acetonitrile interface. Although hot-carrier processes have been previously reported, this is the first observation of a chemical product produced by a hot-carrier reaction in a photoelectrochemical cell. Band-edge positions have been determined by capacitance measurements done under conditions identical with the hot-carrier copper-plating experiments. Supraband-edge production of Cu(O) occurred at high-doped (1.2 /times/ 10/sup 18/ cm/sup /minus/3/) p-InP but was observed at low-doped (8 /times/ 10/sup 15/ cm/sup /minus/3/) samples. For the high-doped electrode, a quantum yield for production of copper by hot electrons of 0.25% was measured, but this represents only a lower limit to the actual quantum yield for hot electrons since the hot-carrier probe reaction must complete with other processes. Nearly identical quantum yields were measured with both 632.8- and 543.5-nm illumination; however, the intensity profile across the electrode surface has a dramatic effect on the quantum yield.

• Research Organization: Univ. of Colorado, Boulder (USA)
• DOE Contract Number: FG02-84ER13247
• OSTI ID: 5852363
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 111:6; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
400500* -- Photochemistry
ACETONITRILE
CHEMICAL REACTIONS
CHEMISTRY
COMPLEXES
COPPER COMPLEXES
DATA
EFFICIENCY
ELECTROCHEMISTRY
EXPERIMENTAL DATA
INFORMATION
INTERFACES
MATERIALS
NITRILES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
P-TYPE CONDUCTORS
PHOTOCHEMICAL REACTIONS
PHOTOELECTRIC EFFECT
PHOTOELECTROMAGNETIC EFFECTS
QUANTUM EFFICIENCY
REDUCTION
SEMICONDUCTOR MATERIALS
TRANSITION ELEMENT COMPLEXES