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Photoelectrochemical properties of mesoporous NiO x deposited on technical FTO via nanopowder sintering in conventional and plasma atmospheres.

Awais M, Dowling DD, Decker F, Dini D - Springerplus (2015)

Bottom Line: Photoelectrochemical effects of sensitized RDS NiO x were evidenced upon oxide reduction.With the addition of iodine RDS NiOx electrodes could give the reduction iodine → iodide in addition to the reduction of RDS NiO x . p-type dye sensitized solar cells were assembled with RDS NiO x photocathodes sensitized either by ERY or Fast Green.Resulting overall efficiencies ranged between 0.02 and 0.04 % upon irradiation with solar spectrum simulator (I in: 0.1 W cm(-2)).

View Article: PubMed Central - PubMed

Affiliation: Department of Industrial Engineering, "King Abdulaziz" University, Rabigh, KSA.

ABSTRACT
Nanoporous nickel oxide (NiO x ) has been deposited with two different procedures of sintering (CS and RDS). Both samples display solid state oxidation at about 3.1 V vs Li+/Li. Upon sensitization of CS/RDS NiO x with erythrosine b (ERY), nickel oxide oxidation occurs at the same potential. Impedance spectroscopy revealed a higher charge transfer resistance for ERY-sensitized RDS NiO x with respect to sensitized CS NiO x . This was due to the chemisorption of a larger amount of ERY on RDS with respect to CS NiO x . Upon illumination the photoinduced charge transfer between ERY layer and NiO x could be observed only with oxidized CS. Photoelectrochemical effects of sensitized RDS NiO x were evidenced upon oxide reduction. With the addition of iodine RDS NiOx electrodes could give the reduction iodine → iodide in addition to the reduction of RDS NiO x . p-type dye sensitized solar cells were assembled with RDS NiO x photocathodes sensitized either by ERY or Fast Green. Resulting overall efficiencies ranged between 0.02 and 0.04 % upon irradiation with solar spectrum simulator (I in: 0.1 W cm(-2)).

No MeSH data available.


Cyclic voltammetries of CS NiOx on FTO substrate at different scan rates. Open circuit potential (OCV): 3.07 V vs Li+/Li. (J current density, E applied potential). Electrolyte as in Fig. 1. Arrows indicate the verse of scan
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Fig4: Cyclic voltammetries of CS NiOx on FTO substrate at different scan rates. Open circuit potential (OCV): 3.07 V vs Li+/Li. (J current density, E applied potential). Electrolyte as in Fig. 1. Arrows indicate the verse of scan

Mentions: CS NiOx sample presents a quasi-reversible oxidation peak centred approximately at 3.40 V vs Li+/Li when scan rate is 6 mV s−1 (Fig. 4). Such a peak presents broad features and refers to the conversion of Ni(II) into Ni(III) within the oxide film (Boschloo and Hagfeldt 2001).Fig. 4


Photoelectrochemical properties of mesoporous NiO x deposited on technical FTO via nanopowder sintering in conventional and plasma atmospheres.

Awais M, Dowling DD, Decker F, Dini D - Springerplus (2015)

Cyclic voltammetries of CS NiOx on FTO substrate at different scan rates. Open circuit potential (OCV): 3.07 V vs Li+/Li. (J current density, E applied potential). Electrolyte as in Fig. 1. Arrows indicate the verse of scan
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Related In: Results  -  Collection

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Fig4: Cyclic voltammetries of CS NiOx on FTO substrate at different scan rates. Open circuit potential (OCV): 3.07 V vs Li+/Li. (J current density, E applied potential). Electrolyte as in Fig. 1. Arrows indicate the verse of scan
Mentions: CS NiOx sample presents a quasi-reversible oxidation peak centred approximately at 3.40 V vs Li+/Li when scan rate is 6 mV s−1 (Fig. 4). Such a peak presents broad features and refers to the conversion of Ni(II) into Ni(III) within the oxide film (Boschloo and Hagfeldt 2001).Fig. 4

Bottom Line: Photoelectrochemical effects of sensitized RDS NiO x were evidenced upon oxide reduction.With the addition of iodine RDS NiOx electrodes could give the reduction iodine → iodide in addition to the reduction of RDS NiO x . p-type dye sensitized solar cells were assembled with RDS NiO x photocathodes sensitized either by ERY or Fast Green.Resulting overall efficiencies ranged between 0.02 and 0.04 % upon irradiation with solar spectrum simulator (I in: 0.1 W cm(-2)).

View Article: PubMed Central - PubMed

Affiliation: Department of Industrial Engineering, "King Abdulaziz" University, Rabigh, KSA.

ABSTRACT
Nanoporous nickel oxide (NiO x ) has been deposited with two different procedures of sintering (CS and RDS). Both samples display solid state oxidation at about 3.1 V vs Li+/Li. Upon sensitization of CS/RDS NiO x with erythrosine b (ERY), nickel oxide oxidation occurs at the same potential. Impedance spectroscopy revealed a higher charge transfer resistance for ERY-sensitized RDS NiO x with respect to sensitized CS NiO x . This was due to the chemisorption of a larger amount of ERY on RDS with respect to CS NiO x . Upon illumination the photoinduced charge transfer between ERY layer and NiO x could be observed only with oxidized CS. Photoelectrochemical effects of sensitized RDS NiO x were evidenced upon oxide reduction. With the addition of iodine RDS NiOx electrodes could give the reduction iodine → iodide in addition to the reduction of RDS NiO x . p-type dye sensitized solar cells were assembled with RDS NiO x photocathodes sensitized either by ERY or Fast Green. Resulting overall efficiencies ranged between 0.02 and 0.04 % upon irradiation with solar spectrum simulator (I in: 0.1 W cm(-2)).

No MeSH data available.