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Title: Electrochemical photovoltaic cells based on n-GaAs and the triiodide/iodide redox couple in acetonitrile

Abstract

The electrochemical photovoltaic cell (EPC) based on n-GaAs and a CH/sub 3/CN, I/sub 3//sup -//I/sup -/ redox electrolyte was evaluated. Greater than 1MI/sup -/ was necessary to avoid concentration polarization at the photoanode above moderate illumination intensities. The charge separation at the illuminated n-GaAs/electrolyte interface was enhanced by adsorption of Se/sup ./ and Ru/sup +3/ or by complexing polymers such as polyvinyl pyrrolidone. In practical cells, a compromise is necessary between light absorption by I/sub 3//sup -/, and having sufficient I/sub 3//sup -/ to depolarize the counterelectrode. Best ''solar cell'' efficiency in the quiescent electrolyte under 53 mW/cm/sup 2/ irradiation was about 3.4% with V/sub oc/.0.60,i/sub sc/.9 mA/cm/sup 2/, and fill factor 0.34 with no corrections for solution absorbance or cell reflectance. 16 refs.

Authors:
; ;
Publication Date:
Research Org.:
EIC Lab Inc, Newton, MA, USA
OSTI Identifier:
6492704
Resource Type:
Journal Article
Journal Name:
J. Electrochem. Soc.; (United States)
Additional Journal Information:
Journal Volume: 129:8
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; PHOTOELECTROCHEMICAL CELLS; DESIGN; PERFORMANCE; ACETONITRILE; ADSORPTION; ELECTROLYTES; FILL FACTORS; GALLIUM ARSENIDES; IODIDES; OPTIMIZATION; PHOTOANODES; REDOX REACTIONS; RUTHENIUM IONS; SELENIUM IONS; ANODES; ARSENIC COMPOUNDS; ARSENIDES; CHARGED PARTICLES; CHEMICAL REACTIONS; ELECTROCHEMICAL CELLS; ELECTRODES; EQUIPMENT; GALLIUM COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; IODINE COMPOUNDS; IONS; NITRILES; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; PNICTIDES; SOLAR EQUIPMENT; SORPTION; 140505* - Solar Energy Conversion- Photochemical, Photobiological, & Thermochemical Conversion- (1980-)

Citation Formats

Langmuir, M E, Parker, M A, and Rauh, R D. Electrochemical photovoltaic cells based on n-GaAs and the triiodide/iodide redox couple in acetonitrile. United States: N. p., 1982. Web. doi:10.1149/1.2124254.
Langmuir, M E, Parker, M A, & Rauh, R D. Electrochemical photovoltaic cells based on n-GaAs and the triiodide/iodide redox couple in acetonitrile. United States. https://doi.org/10.1149/1.2124254
Langmuir, M E, Parker, M A, and Rauh, R D. 1982. "Electrochemical photovoltaic cells based on n-GaAs and the triiodide/iodide redox couple in acetonitrile". United States. https://doi.org/10.1149/1.2124254.
@article{osti_6492704,
title = {Electrochemical photovoltaic cells based on n-GaAs and the triiodide/iodide redox couple in acetonitrile},
author = {Langmuir, M E and Parker, M A and Rauh, R D},
abstractNote = {The electrochemical photovoltaic cell (EPC) based on n-GaAs and a CH/sub 3/CN, I/sub 3//sup -//I/sup -/ redox electrolyte was evaluated. Greater than 1MI/sup -/ was necessary to avoid concentration polarization at the photoanode above moderate illumination intensities. The charge separation at the illuminated n-GaAs/electrolyte interface was enhanced by adsorption of Se/sup ./ and Ru/sup +3/ or by complexing polymers such as polyvinyl pyrrolidone. In practical cells, a compromise is necessary between light absorption by I/sub 3//sup -/, and having sufficient I/sub 3//sup -/ to depolarize the counterelectrode. Best ''solar cell'' efficiency in the quiescent electrolyte under 53 mW/cm/sup 2/ irradiation was about 3.4% with V/sub oc/.0.60,i/sub sc/.9 mA/cm/sup 2/, and fill factor 0.34 with no corrections for solution absorbance or cell reflectance. 16 refs.},
doi = {10.1149/1.2124254},
url = {https://www.osti.gov/biblio/6492704}, journal = {J. Electrochem. Soc.; (United States)},
number = ,
volume = 129:8,
place = {United States},
year = {Sun Aug 01 00:00:00 EDT 1982},
month = {Sun Aug 01 00:00:00 EDT 1982}
}