Electrolyte electroreflectance study of surface optimization of n-CuInSe/sub 2/ in photoelectrochemical solar cells

Journal Article · Wed Jan 01 04:00:00 EST 1986 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2108502· OSTI ID:5838261

Shen, W M; Siripala, W; Tomkiewicz, M; Cahen, D

Electrolyte electroreflectance is used to show that the main effect of Br/sub 2//MeOH etching of CuInSe/sub 2/ is to remove the pinning of the Fermi level, which is due to a monolayer of states located 0.17V positive to the potential of the solution. The flatband potential of CuInSe/sub 2/ in polysulfide solution was found to be -0.62V vs. the solution potential, while in polyiodide solution it is shifted to -.070V vs. the potential of that solution. This shift can explain some of the improvement in performance in polyiodide compared to polysulfide. The bandgap of CuInSe/sub 2/ was found to be a direct transition at 1.01 eV with a three-dimensional critical point.

• Research Organization: Dept. of Physics, Brooklyn College of the City Univ. of New York, Brooklyn, NY 11210
• OSTI ID: 5838261
• 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

Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
ALKANES
BROMIDES
BROMINE COMPOUNDS
CHALCOGENIDES
COPPER SELENIDE SOLAR CELLS
DIRECT ENERGY CONVERTERS
ELECTRIC POTENTIAL
ELECTROLYTES
ENERGY LEVELS
ENERGY RANGE
EQUIPMENT
ETCHING
EV RANGE
EV RANGE 01-10
FERMI LEVEL
GRADED BAND GAPS
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXIDES
INDIUM SELENIDE SOLAR CELLS
IODIDES
IODINE COMPOUNDS
LAYERS
METHANE
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
REFLECTION
SOLAR CELLS
SOLAR EQUIPMENT
SULFIDES
SULFUR COMPOUNDS
SURFACE FINISHING
SURFACE TREATMENTS