Study of charge accumulation kinetics in MOS structures with intrinsic anodic oxide on InSb by measuring transient photocurrents

1985 ◽  
Vol 90 (1) ◽  
pp. 393-400
Author(s):  
N. A. Avdeev ◽  
Yu. E. Gabdin ◽  
V. A. Gurtov ◽  
S. N. Kuznetsov
Keyword(s):  
Anodic Oxide ◽  
Charge Accumulation ◽  
Accumulation Kinetics ◽  
Mos Structures

scholarly journals Charge Accumulation Kinetics in Multi-redox Molecular Catalysts Immobilised on TiO2

2020 ◽  
Author(s):  
Carlota Bozal-Ginesta ◽  
Camilo A. Mesa ◽  
Annika Eisenschmidt ◽  
Ravi Shankar ◽  
Laia Francàs ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Redox Potentials ◽  
Charge Accumulation ◽  
Excitation Light ◽  
Molecular Catalyst ◽  
Hole Scavenger ◽  
Accumulation Kinetics ◽  
Molecular Catalysts

Multi-redox catalysis requires the transfer of more than one charge carrier and is crucial for solar energy conversion into fuels and valuable chemicals. In photo(electro)chemical systems, however, the necessary accumulation of multiple, long-lived charges is challenged by recombination with their counterparts. Herein, we investigate charge accumulation in two model multi-redox molecular catalysts for proton and CO<sub>2</sub> reduction attached onto mesoporous TiO<sub>2</sub> electrodes. Transient absorption spectroscopy and spectroelectrochemical techniques have been employed to study the kinetics of photoinduced electron transfer from the TiO<sub>2</sub> to the molecular catalysts in acetonitrile, with triethanolamine as the hole scavenger. At high light intensities, we detect charge accumulation in the millisecond timescale in the form of multi-reduced species. The redox potentials of the catalysts and the capacity of TiO<sub>2</sub> to accumulate electrons play an essential role in the charge accumulation process at the molecular catalyst. Recombination of reduced species with valence band holes in TiO<sub>2</sub> is observed to be faster than microseconds, while electron transfer from multi-reduced species to the conduction band or the electrolyte occurs in the millisecond timescale. Finally, under light irradiation, we show how charge accumulation on the catalyst is regulated as a function of the applied bias and the excitation light intensity.

Charge accumulation in the dielectric of the nanocluster NVM MOS structures under anti- and unipolar W/E window formation

2007 ◽  
Vol 47 (4-5) ◽  
pp. 626-630 ◽  
Author(s):  
V. Turchanikov ◽  
A. Nazarov ◽  
V. Lysenko ◽  
V. Ostahov ◽  
O. Winkler ◽  
...  
Keyword(s):  
Charge Accumulation ◽  
Mos Structures

Investigations on the CdS passivated anodic oxide–InP interface for MOS structures

1999 ◽  
Vol 60 (1) ◽  
pp. 25-30 ◽  
Author(s):  
R.R Sumathi ◽  
M Senthil Kumar ◽  
N Dharmarasu ◽  
J Kumar
Keyword(s):  
Anodic Oxide ◽  
Mos Structures

Improved electrical properties on the anodic oxide/InP interface for MOS structures

1998 ◽  
Vol 27 (12) ◽  
pp. 1358-1361 ◽  
Author(s):  
R. R. Sumathi ◽  
N. Dharmarasu ◽  
S. Arulkumaran ◽  
P. Jayavel ◽  
J. Kumar
Keyword(s):  
Electrical Properties ◽  
Anodic Oxide ◽  
Mos Structures

scholarly journals Charge Accumulation Kinetics in Multi-redox Molecular Catalysts Immobilised on TiO2

2020 ◽  
Author(s):  
Carlota Bozal-Ginesta ◽  
Camilo A. Mesa ◽  
Annika Eisenschmidt ◽  
Ravi Shankar ◽  
Laia Francàs ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Redox Potentials ◽  
Charge Accumulation ◽  
Excitation Light ◽  
Molecular Catalyst ◽  
Hole Scavenger ◽  
Accumulation Kinetics ◽  
Molecular Catalysts

Multi-redox catalysis requires the transfer of more than one charge carrier and is crucial for solar energy conversion into fuels and valuable chemicals. In photo(electro)chemical systems, however, the necessary accumulation of multiple, long-lived charges is challenged by recombination with their counterparts. Herein, we investigate charge accumulation in two model multi-redox molecular catalysts for proton and CO<sub>2</sub> reduction attached onto mesoporous TiO<sub>2</sub> electrodes. Transient absorption spectroscopy and spectroelectrochemical techniques have been employed to study the kinetics of photoinduced electron transfer from the TiO<sub>2</sub> to the molecular catalysts in acetonitrile, with triethanolamine as the hole scavenger. At high light intensities, we detect charge accumulation in the millisecond timescale in the form of multi-reduced species. The redox potentials of the catalysts and the capacity of TiO<sub>2</sub> to accumulate electrons play an essential role in the charge accumulation process at the molecular catalyst. Recombination of reduced species with valence band holes in TiO<sub>2</sub> is observed to be faster than microseconds, while electron transfer from multi-reduced species to the conduction band or the electrolyte occurs in the millisecond timescale. Finally, under light irradiation, we show how charge accumulation on the catalyst is regulated as a function of the applied bias and the excitation light intensity.

scholarly journals Charge accumulation kinetics in multi-redox molecular catalysts immobilised on TiO2

2021 ◽  
Author(s):  
Carlota Bozal-Ginesta ◽  
Camilo A. Mesa ◽  
Annika Eisenschmidt ◽  
Laia Francàs ◽  
Ravi B. Shankar ◽  
...  
Keyword(s):  
Light Intensity ◽  
Charge Accumulation ◽  
Applied Bias ◽  
Accumulation Kinetics ◽  
Molecular Catalysts

Using transient spectroelectrochemical techniques, we investigate multiply reduced states of molecular catalysts on titania photoelectrodes as a function of the applied bias and the light intensity.

Charge Accumulation in MOS Structures with a Polysilicon Gate under Tunnel Injection

2018 ◽  
Vol 52 (13) ◽  
pp. 1732-1737
Author(s):  
O. V. Aleksandrov ◽  
A. N. Ageev ◽  
S. I. Zolotarev
Keyword(s):  
Charge Accumulation ◽  
Polysilicon Gate ◽  
Mos Structures ◽  
Tunnel Injection

The Characteristics of thin-film gallium phosphide MOS structures with a tunnel transparent native anodic oxide

1985 ◽  
Vol 88 (1) ◽  
pp. 355-363
Author(s):  
G. S. Korotchenkov ◽  
A. A. Gutkin ◽  
A. M. Maeinova
Keyword(s):  
Thin Film ◽  
Gallium Phosphide ◽  
Anodic Oxide ◽  
Mos Structures
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