Observation of the potential-dependent second harmonic response from the Si(111)/electrolyte and Si(111)SiO[sub 2]/electrolyte interfacial regions
Journal Article
·
· Journal of Physical Chemistry; (United States)
- Univ. of Oregon, Eugene, OR (United States)
The optical second harmonic (SH) response from the n-Si(111) surface immersed in aqueous electrolyte solutions has been examined and is observed to be potential dependent. This potential dependence is observed for both the monohydrogen-terminated surface immersed in NH[sub 4]F as well as for surfaces which are photoanodically oxidized in H[sub 2]SO[sub 4]. The potential dependence from the latter is screened in part by the presence of the insulating overlayer. Furthermore, a minimum is observed in the potential-dependent response which is shifted well anodic of the flatband potential. The SH observations are attributed to field effects within the space charge region of the semiconductor which are manifested in the higher order bulk SH response. Photocurrent transient analysis is utilized as a means of determining the flatband potential of these surfaces immersed in electrolyte solution. Experiments performed in UHV are discussed and compared to that observed in solution. 71 refs., 9 figs., 1 tab.
- DOE Contract Number:
- FG06-86ER45273
- OSTI ID:
- 6566312
- Journal Information:
- Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 99:10; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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Sensitivity of second harmonic generation to space charge effects at Si(111)/electrolyte and Si(111)/SiO[sub 2]/electrolyte interfaces
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Thu Sep 01 00:00:00 EDT 1994
· Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (United States)
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OSTI ID:7072001
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Related Subjects
36 MATERIALS SCIENCE
360600* -- Other Materials
360606 -- Other Materials-- Physical Properties-- (1992-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
400500 -- Photochemistry
661100 -- Classical & Quantum Mechanics-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AQUEOUS SOLUTIONS
CHALCOGENIDES
CURRENTS
DISPERSIONS
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
ELECTROLYTES
ELECTRON DENSITY
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FREQUENCY MIXING
HARMONIC GENERATION
INTERFACES
MATERIALS
MINERALS
MIXTURES
OPTICAL PROPERTIES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHOTOCURRENTS
PHYSICAL PROPERTIES
POTENTIALS
ROTATIONAL STATES
SEMICONDUCTOR MATERIALS
SEMIMETALS
SILICA
SILICON
SILICON COMPOUNDS
SILICON OXIDES
SOLUTIONS
SURFACE POTENTIAL
360600* -- Other Materials
360606 -- Other Materials-- Physical Properties-- (1992-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
400500 -- Photochemistry
661100 -- Classical & Quantum Mechanics-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AQUEOUS SOLUTIONS
CHALCOGENIDES
CURRENTS
DISPERSIONS
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
ELECTROLYTES
ELECTRON DENSITY
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FREQUENCY MIXING
HARMONIC GENERATION
INTERFACES
MATERIALS
MINERALS
MIXTURES
OPTICAL PROPERTIES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHOTOCURRENTS
PHYSICAL PROPERTIES
POTENTIALS
ROTATIONAL STATES
SEMICONDUCTOR MATERIALS
SEMIMETALS
SILICA
SILICON
SILICON COMPOUNDS
SILICON OXIDES
SOLUTIONS
SURFACE POTENTIAL