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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.


Related in: MedlinePlus

Effect of light on the voltammogram of bare RDS NiOx. Electrolyte: 0.5 M LiClO4 in propylene carbonate. Electrode is illuminated with white light (intensity: 25 W cm−2)
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Fig22: Effect of light on the voltammogram of bare RDS NiOx. Electrolyte: 0.5 M LiClO4 in propylene carbonate. Electrode is illuminated with white light (intensity: 25 W cm−2)

Mentions: Voltammograms of Figs. 22, 23, 24, 25, 26, 27, 28 have been determined in a single scan in going from +1 to −1 V vs SCE at the span rate of 20 mV s−1. In the potential range here examined RDS NiOx can undergo both oxidation and reduction processes (Awais et al. 2013). Moreover, we have considered also electrolytes containing iodine as electroactive species. This is because iodine is one constituent of the main redox couple utilized in DSCs applications (Boschloo and Hagfeldt 2009). The main motivation of this study is the distinction between the electrochemical/photoelectrochemical signals generated by the electroactivity of RDS NiOx deposited onto FTO, from those produced by the redox species of p-DSCs (Dini et al. 2015).Fig. 22


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)

Effect of light on the voltammogram of bare RDS NiOx. Electrolyte: 0.5 M LiClO4 in propylene carbonate. Electrode is illuminated with white light (intensity: 25 W cm−2)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4627985&req=5

Fig22: Effect of light on the voltammogram of bare RDS NiOx. Electrolyte: 0.5 M LiClO4 in propylene carbonate. Electrode is illuminated with white light (intensity: 25 W cm−2)
Mentions: Voltammograms of Figs. 22, 23, 24, 25, 26, 27, 28 have been determined in a single scan in going from +1 to −1 V vs SCE at the span rate of 20 mV s−1. In the potential range here examined RDS NiOx can undergo both oxidation and reduction processes (Awais et al. 2013). Moreover, we have considered also electrolytes containing iodine as electroactive species. This is because iodine is one constituent of the main redox couple utilized in DSCs applications (Boschloo and Hagfeldt 2009). The main motivation of this study is the distinction between the electrochemical/photoelectrochemical signals generated by the electroactivity of RDS NiOx deposited onto FTO, from those produced by the redox species of p-DSCs (Dini et al. 2015).Fig. 22

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.


Related in: MedlinePlus