Impedance study of surface optimization of n-CuInSe/sub 2/ in photoelectrochemical solar cells
Journal Article
·
· J. Electrochem. Soc.; (United States)
Impedance measurements were used to complement previously described electrolyte electroreflectance studies in an attempt to understand the improvement in photoelectrochemical performance of single-crystal n-CuInSe/sub 2/ in contact with aqueous polyiodide electrolyte, due to etching and oxidation. The authors found that etching removes most of the fast surface states from the interface, retaining less than 1% of a monolayer of states of two different energies: one centered at 0.17 eV below the conduction band and another one is located around the middle of the gap, 0.45 eV below the conduction band. The flatband potential of the etched sample was found to be -0.69V vs. the solution potential, in agreement with the electroreflectance results. Only one of the surface states, the one close to the conduction band, was found to be responsible for surface recombination.
- Research Organization:
- Dept. of Physics, Brooklyn College of the City Univ. of New York, Brooklyn, NY 11210
- OSTI ID:
- 5838247
- Journal Information:
- J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 133:1; ISSN JESOA
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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· J. Electrochem. Soc.; (United States)
·
OSTI ID:5984363
Related Subjects
14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
CHEMICAL REACTIONS
COPPER SELENIDE SOLAR CELLS
CRYSTAL DOPING
CRYSTALS
CURRENTS
DIFFUSION LENGTH
DIMENSIONS
DIRECT ENERGY CONVERTERS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRIC IMPEDANCE
ELECTRIC POTENTIAL
ELECTRICAL PROPERTIES
ELECTROLYTES
ENERGY RANGE
EQUIPMENT
ETCHING
EV RANGE
EV RANGE 01-10
ILLUMINANCE
IMPEDANCE
INDIUM SELENIDE SOLAR CELLS
LENGTH
MONOCRYSTALS
OPTIMIZATION
OXIDATION
PERFORMANCE TESTING
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
RECOMBINATION
REFLECTION
SOLAR CELLS
SOLAR EQUIPMENT
SURFACE FINISHING
TESTING
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
CHEMICAL REACTIONS
COPPER SELENIDE SOLAR CELLS
CRYSTAL DOPING
CRYSTALS
CURRENTS
DIFFUSION LENGTH
DIMENSIONS
DIRECT ENERGY CONVERTERS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRIC IMPEDANCE
ELECTRIC POTENTIAL
ELECTRICAL PROPERTIES
ELECTROLYTES
ENERGY RANGE
EQUIPMENT
ETCHING
EV RANGE
EV RANGE 01-10
ILLUMINANCE
IMPEDANCE
INDIUM SELENIDE SOLAR CELLS
LENGTH
MONOCRYSTALS
OPTIMIZATION
OXIDATION
PERFORMANCE TESTING
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
RECOMBINATION
REFLECTION
SOLAR CELLS
SOLAR EQUIPMENT
SURFACE FINISHING
TESTING