DC surface conductance as a tool for the study of electrochemical interfaces
DC surface conductance is a simple and powerful method for the study of electrochemical interfaces. Its applicability to semiconductor film/electrolyte junctions is analyzed from a theoretical and experimental approach. The experimental design and the fundamentals of the measuring method for semicon...
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todo:paper_09277757_v134_n1-2_p47_Bilmes2023-10-03T15:47:05Z DC surface conductance as a tool for the study of electrochemical interfaces Bilmes, S.A. Posadas, D. CdS films Modified semiconductor electrodes Semiconductor/electrolyte interfaces Surface conductance Capacitance measurement Electric current measurement Electric resistance measurement Electric space charge Electrochemical electrodes Electrolytes Energy gap Mathematical models Polarization Semiconducting cadmium compounds Semiconducting films Cadmium sulfide Carrier mobility Interfaces (materials) article conductance electric conductivity electrochemical detection electrode polarization priority journal semiconductor surface property DC surface conductance is a simple and powerful method for the study of electrochemical interfaces. Its applicability to semiconductor film/electrolyte junctions is analyzed from a theoretical and experimental approach. The experimental design and the fundamentals of the measuring method for semiconductor film electrodes are presented, taking into account the potential and current distribution arising from the polarization current and its influence on the measuring current. The dependence of surface conductance on the electrode potential is modeled by describing the space charge layer as that of an ideal Schottky junction. Corrections due to the decrease of carrier mobility in strong accumulation layers are also included in the model. Surface conductance-potential curves for CdS films in electrolytes are interpreted with this simple model, and parameters such as flat band potential, donor density and mobility are obtained for these interfaces. These results correlate with those obtained from capacitance and modulated transmittance experiments. Conductance measurements for CdS surface modified by S 2- or by Au deposits reveal that there is a change in the density of filled carrier traps with energy levels in the band gap. DC surface conductance is a simple and powerful method for the study of electrochemical interfaceS. Its applicability to semiconductor film/electrolyte junctions is analyzed from a theoretical and experimental approach. The experimental design and the fundamentals of the measuring method for semiconductor film electrodes are presented, taking into account the potential and current distribution arising from the polarization current and its influence on the measuring current. The dependence of surface conductance on the electrode potential is modeled by describing the space charge layer as that of an ideal Schottky junction. Corrections due to the decrease of carrier mobility in strong accumulation layers are also included in the model. Surface conductance-potential curves for CdS films in electrolytes are interpreted with this simple model, and parameters such as flat band potential, donor density and mobility are obtained for these interfaces. These results correlate with those obtained from capacitance and modulated transmittance experiments. Conductance measurements for CdS surface modified by S 2- or by Au deposits reveal that there is a change in the density of filled carrier traps with energy levels in the band gap. Fil:Bilmes, S.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09277757_v134_n1-2_p47_Bilmes |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
CdS films Modified semiconductor electrodes Semiconductor/electrolyte interfaces Surface conductance Capacitance measurement Electric current measurement Electric resistance measurement Electric space charge Electrochemical electrodes Electrolytes Energy gap Mathematical models Polarization Semiconducting cadmium compounds Semiconducting films Cadmium sulfide Carrier mobility Interfaces (materials) article conductance electric conductivity electrochemical detection electrode polarization priority journal semiconductor surface property |
| spellingShingle |
CdS films Modified semiconductor electrodes Semiconductor/electrolyte interfaces Surface conductance Capacitance measurement Electric current measurement Electric resistance measurement Electric space charge Electrochemical electrodes Electrolytes Energy gap Mathematical models Polarization Semiconducting cadmium compounds Semiconducting films Cadmium sulfide Carrier mobility Interfaces (materials) article conductance electric conductivity electrochemical detection electrode polarization priority journal semiconductor surface property Bilmes, S.A. Posadas, D. DC surface conductance as a tool for the study of electrochemical interfaces |
| topic_facet |
CdS films Modified semiconductor electrodes Semiconductor/electrolyte interfaces Surface conductance Capacitance measurement Electric current measurement Electric resistance measurement Electric space charge Electrochemical electrodes Electrolytes Energy gap Mathematical models Polarization Semiconducting cadmium compounds Semiconducting films Cadmium sulfide Carrier mobility Interfaces (materials) article conductance electric conductivity electrochemical detection electrode polarization priority journal semiconductor surface property |
| description |
DC surface conductance is a simple and powerful method for the study of electrochemical interfaces. Its applicability to semiconductor film/electrolyte junctions is analyzed from a theoretical and experimental approach. The experimental design and the fundamentals of the measuring method for semiconductor film electrodes are presented, taking into account the potential and current distribution arising from the polarization current and its influence on the measuring current. The dependence of surface conductance on the electrode potential is modeled by describing the space charge layer as that of an ideal Schottky junction. Corrections due to the decrease of carrier mobility in strong accumulation layers are also included in the model. Surface conductance-potential curves for CdS films in electrolytes are interpreted with this simple model, and parameters such as flat band potential, donor density and mobility are obtained for these interfaces. These results correlate with those obtained from capacitance and modulated transmittance experiments. Conductance measurements for CdS surface modified by S 2- or by Au deposits reveal that there is a change in the density of filled carrier traps with energy levels in the band gap. DC surface conductance is a simple and powerful method for the study of electrochemical interfaceS. Its applicability to semiconductor film/electrolyte junctions is analyzed from a theoretical and experimental approach. The experimental design and the fundamentals of the measuring method for semiconductor film electrodes are presented, taking into account the potential and current distribution arising from the polarization current and its influence on the measuring current. The dependence of surface conductance on the electrode potential is modeled by describing the space charge layer as that of an ideal Schottky junction. Corrections due to the decrease of carrier mobility in strong accumulation layers are also included in the model. Surface conductance-potential curves for CdS films in electrolytes are interpreted with this simple model, and parameters such as flat band potential, donor density and mobility are obtained for these interfaces. These results correlate with those obtained from capacitance and modulated transmittance experiments. Conductance measurements for CdS surface modified by S 2- or by Au deposits reveal that there is a change in the density of filled carrier traps with energy levels in the band gap. |
| format |
JOUR |
| author |
Bilmes, S.A. Posadas, D. |
| author_facet |
Bilmes, S.A. Posadas, D. |
| author_sort |
Bilmes, S.A. |
| title |
DC surface conductance as a tool for the study of electrochemical interfaces |
| title_short |
DC surface conductance as a tool for the study of electrochemical interfaces |
| title_full |
DC surface conductance as a tool for the study of electrochemical interfaces |
| title_fullStr |
DC surface conductance as a tool for the study of electrochemical interfaces |
| title_full_unstemmed |
DC surface conductance as a tool for the study of electrochemical interfaces |
| title_sort |
dc surface conductance as a tool for the study of electrochemical interfaces |
| url |
http://hdl.handle.net/20.500.12110/paper_09277757_v134_n1-2_p47_Bilmes |
| work_keys_str_mv |
AT bilmessa dcsurfaceconductanceasatoolforthestudyofelectrochemicalinterfaces AT posadasd dcsurfaceconductanceasatoolforthestudyofelectrochemicalinterfaces |
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1807324663318052864 |