CuNbO3 as a solar energy converter to fuel and electricity

Crespo, César Tablero

doi:10.1016/j.solmat.2017.12.025

Cited by 12 publications

(11 citation statements)

References 27 publications

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“…This deficiency is usual in the Cu 2 O‐based system and this can be avoided by taking excess Cu 2 O precursor. The prepared thin film shows an absorption edge at 350 nm, which occurs from the transition of filled O‐based p‐orbital to the empty Nb‐based d‐orbital (p(O)‐d (Nb)) of the niobium octahedra rather from the copper octahedral units 33 . Also, literature reveals broad absorption in monoclinic CuNb 3 O 8 is due to the empty d‐orbitals of the niobium atom in the octahedral structure.…”

Section: Resultsmentioning

confidence: 95%

Fabrication of copper‐niobium‐oxygen complexes as a photocathode for p‐type dye‐sensitized solar cell

et al. 2021

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Summary Thin film of copper niobate ternary oxide with various compositions was fabricated by pulsed laser deposition technique. Formation of a single phase of monoclinic CuNbO3, monoclinic CuNb3O8 (Cu[I]), and triclinic Cu3Nb2O8 (Cu[II]) thin films was confirmed from the X‐ray diffraction and selected area energy diffraction analysis. Field emission scanning electron microscopy and high‐resolution tunneling electron microscope show CuNbO3 and CuNb3O8 system that exhibits polyhedron and triangular structure, respectively, while Cu3Nb2O8 system shows layered structure formation. The linear spectrum shows a minimal variation in bandgap concerning to the change in elemental composition and position of the copper and niobium atom. Cyclic voltammetry studies endorse that the prepared films are highly adhesive even after 100 cycles. With various compositions of copper niobate thin films as photocathode, N719 sensitized p‐dye‐sensitized solar cells (p‐DSSCs) were fabricated for the first time. Monoclinic CuNbO3 system offers outstanding photovoltaic performance of 2.19% and thus can be used as an alternative for well‐known NiO p‐DSSC. Advantages of copper‐niobium‐oxygen systems open a new route of photocathodic materials for p‐DSSC and tandem solar cells.

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Section: Resultsmentioning

confidence: 95%

Fabrication of copper‐niobium‐oxygen complexes as a photocathode for p‐type dye‐sensitized solar cell

et al. 2021

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“…Finally, as this material is attractive for the conversion of solar energy, we have evaluated its potential (Crespo, 2018;Tablero, 2017) as an isolated converter (Fig. 6a) or as a two-terminal device where Fe 2 V 4 0i3 is combined in series with another semiconductor with a bandgap E g (Fig.…”

Section: Evaluation As Solar Energy Convertermentioning

confidence: 99%

“…However, there are other loss mechanisms that reduce the efficiency (non-radiative recombination, surface recombination, etc). These effects can be modeled by multiplying the emission current by 1/p (Baruch et al, 1995;Crespo, 2018;Ross and Collins, 1980). The factor p represents the fraction of radiative recombination with respect to the total losses (radiative recombination, non-radiative, etc.).…”

Section: Evaluation As Solar Energy Convertermentioning

confidence: 99%

“…However, the absorption coefficient does not give us information on the main inter-species contributions. To explore the relationship of optical properties with the crystalline and atomic structure further, the absorption coefficient has been split into inter-species contributions(Crespo, 2018; Tablero, 2017). To achieve this, as the optical properties depend on the transition probabilities via the square of the momentum matrix elements, these matrix elements have been split into inter-species contributions(Crespo, 2018).This analysis is shown in Fig.5(left y-axis).…”

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confidence: 99%

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Electronic, magnetic, optical and solar energy absorption properties of the Fe2V4O13 vanadate

Crespo

2019

Solar Energy

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The iron vanadium oxide semiconductor Fe 2 V 4 0i 3 has interesting properties as an absorbent material for the conversion of solar energy. In this work the electronic, magnetic and optical properties of Fe 2 V 4 0 13 have been obtained and analyzed from theoretical calculations and compared with experimental results. From the results, the main contributions to the optical properties come from the transitions between O-V states. The optical properties have been used to evaluate this compound as a solar energy converter using mono-and multi-junction configurations.

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“…Solar energy has received much attention as a sustainable and clean energy source. The conversion of solar energy into chemical energy is a promising technique in producing renewable energy [1]. It has also been found that photocatalysis can play a very effective role in removing organic pollutants from water [2].…”

Section: Introductionmentioning

confidence: 99%

Assembly of ZnO Nanoparticles on SiO2@α-Fe2O3 Nanocomposites for an Efficient Photo-Fenton Reaction

et al. 2018

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The SiO2@α-Fe2O3/ZnO metal oxide nanocomposites employed in this study were obtained using the sol-gel method. Their photocatalytic activities were enhanced by photo-Fenton reactions. The metal oxide composite of ZnO and α-Fe2O3 nanoparticles were deposited on the SiO2 nanospheres intended for visible light photocatalysis. Further, the as-synthesized SiO2@α-Fe2O3/ZnO nanocomposites exhibited a robust crystallinity and a high adsorption of dye molecules when compared to SiO2@ZnO and SiO2@α-Fe2O3 nanocomposites, respectively. The experimental results demonstrated a rapid Methylene Blue (MB) degradation among these catalysts within short intervals of time with the addition of α-Fe2O3/ZnO mixed metal oxide catalysts on the SiO2 nanospheres. Finally, a photo-Fenton reaction was implemented to confirm the presence of the hydroxyl (OH) radicals, which are powerful agents used for the degradation of organic pollutants.

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CuNbO3 as a solar energy converter to fuel and electricity

Cited by 12 publications

References 27 publications

Fabrication of copper‐niobium‐oxygen complexes as a photocathode for p‐type dye‐sensitized solar cell

Fabrication of copper‐niobium‐oxygen complexes as a photocathode for p‐type dye‐sensitized solar cell

Electronic, magnetic, optical and solar energy absorption properties of the Fe2V4O13 vanadate

Assembly of ZnO Nanoparticles on SiO2@α-Fe2O3 Nanocomposites for an Efficient Photo-Fenton Reaction

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