Chemically derivatized semiconductor photoelectrodes: a technique for the stabilization of n-type semiconductors
Pretreated Au, Pt, n-type Si, and n-type Ge can be derivatized with trichlorosilylferrocene, (1,1'-ferrocenediyl)dichlorosilane, and 1,1'-bis(triethoxysilyl)ferrocene to yield electroactive, surface-attached, oligomeric ferrocene material. Derivatized, n-type semiconductors exhibit photoeffects expected for such an electrode material; irradiated derivatized n-type Si can be used to effect the oxidation of solution reductants by mediated electron transfer, unique proof for which comes from the semiconductor electrode that responds to two stimuli, light and potential. The sustained, mediated oxidation of Fe(CN)/sub 6//sup 4 -/ in aqueous solution in an uphill sense by irradiation of derivatized n-type Si is possible whereas a naked n-type Si undergoes decomposition to SiO/sub x/ at a rate too fast to allow sustained energy conversion. This establishes the principle of manipulating interfacial charge-transfer kinetics for practical applications.
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge
- OSTI ID:
- 5602202
- Journal Information:
- Adv. Chem. Ser.; (United States), Journal Name: Adv. Chem. Ser.; (United States) Vol. 184; ISSN ADCSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
CHALCOGENIDES
CHARGE TRANSPORT
CHEMICAL REACTIONS
COMPLEXES
CURRENTS
CYANIDES
DERIVATIZATION
DIENES
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
ELECTROCHEMICAL CELLS
ELECTRODES
ELEMENTS
EQUIPMENT
FERROCENE
GERMANIUM
GOLD
HYDROCARBONS
IRON COMPLEXES
IRON COMPOUNDS
MATERIALS
METALS
N-TYPE CONDUCTORS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTROCHEMICAL CELLS
PLATINUM
PLATINUM METALS
POLYENES
SEMICONDUCTOR MATERIALS
SEMIMETALS
SILICON
SILICON COMPOUNDS
SILICON OXIDES
SOLAR EQUIPMENT
STABILIZATION
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS