Structural, optical and electrical properties of Nd-doped SnO2 thin films fabricated by reactive magnetron sputtering for solar cell devices

Bouras, Karima; Schmerber, G.; Rinnert, H.; Aureau, Damien; Park, Hyeonwook; Ferblantier, G.; Colis, S.; Fix, Thomas; Park, Chinho; Kim, Woo Kyoung; Dinia, A.; Slaoui, A.

doi:10.1016/j.solmat.2015.07.038

Cited by 62 publications

(25 citation statements)

References 39 publications

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“…Nd 3d spectra (Figure 6f,g) indicate the formation of a main spin-orbit doublet, corresponding to 3d 3/2 and 3d 5/2 peaks at ~1004 and ~982 eV, revealing the presence of Nd 3+ [79]. The appearance of three satellites (six peaks due to spin-orbit splitting) has been ascribed to the different final states, where the XPS core hole is screened by f electrons [80].…”

Section: Resultsmentioning

confidence: 99%

Ethyl Acetate Abatement on Copper Catalysts Supported on Ceria Doped with Rare Earth Oxides

et al. 2016

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Different lanthanide (Ln)-doped cerium oxides (Ce 0.5 Ln 0.5 O 1.75 , where Ln: Gd, La, Pr, Nd, Sm) were loaded with Cu (20 wt. %) and used as catalysts for the oxidation of ethyl acetate (EtOAc), a common volatile organic compound (VOC). For comparison, both Cu-free (Ce-Ln) and supported Cu (Cu/Ce-Ln) samples were characterized by N 2 adsorption at´196˝C, scanning/transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and temperature programmed reduction in H 2 . The following activity sequence, in terms of EtOAc conversion, was found for bare supports: CeO 2 « Ce 0.5 Pr 0.5 O 1.75 > Ce 0.5 Sm 0.5 O 1.75 > Ce 0.5 Gd 0.5 O 1.75 > Ce 0.5 Nd 0.5 O 1.75 > Ce 0.5 La 0.5 O 1.75 . Cu addition improved the catalytic performance, without affecting the activity order. The best catalytic performance was obtained for Cu/CeO 2 and Cu/Ce 0.5 Pr 0.5 O 1.75 samples, both achieving complete EtOAc conversion below ca. 290˝C. A strong correlation was revealed between the catalytic performance and the redox properties of the samples, in terms of reducibility and lattice oxygen availability. No particular correlation between the VOC oxidation performance and textural characteristics was found. The obtained results can be explained in terms of a Mars-van Krevelen type redox mechanism involving the participation of weakly bound (easily reduced) lattice oxygen and its consequent replenishment by gas phase oxygen.

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Section: Resultsmentioning

confidence: 99%

Ethyl Acetate Abatement on Copper Catalysts Supported on Ceria Doped with Rare Earth Oxides

et al. 2016

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“…Bouras et al used Nd-doped SnO 2 films as a luminescent TCO layer in CIGS cells. [125] The layers showed efficient energy transfer from the SnO 2 host matrix to the Nd 3+ dopants, leading to an enhancement of the I sc of the cell. The glass cover slide can also be transformed into an LDS layer by doping with metal ions.…”

Section: Thin Film Solar Cellsmentioning

confidence: 99%

Towards Efficient Spectral Converters through Materials Design for Luminescent Solar Devices

2017

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Single-junction photovoltaic devices exhibit a bottleneck in their efficiency due to incomplete or inefficient harvesting of photons in the low- or high-energy regions of the solar spectrum. Spectral converters can be used to convert solar photons into energies that are more effectively captured by the photovoltaic device through a photoluminescence process. Here, recent advances in the fields of luminescent solar concentration, luminescent downshifting, and upconversion are discussed. The focus is specifically on the role that materials science has to play in overcoming barriers in the optical performance in all spectral converters and on their successful integration with both established (e.g., c-Si, GaAs) and emerging (perovskite, organic, dye-sensitized) cell types. Current challenges and emerging research directions, which need to be addressed for the development of next-generation luminescent solar devices, are also discussed.

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“…There is currently great interest in semiconductor oxides and their heterostructures due to their potential applications in spintronic devices [1], photocatalysis [2], lightemitting diodes, lasers [3] and solar cells [4]. Tin dioxide (SnO 2 ) is one of the most used semiconductor oxides, related to outstanding properties such as high transparency in the visible range, high reflectivity in the infrared [5] and high n-type free carrier concentration [6], even in the undoped form, which may lead to a high conductivity when electron scattering phenomena are prevented.…”

Section: Introductionmentioning

confidence: 99%

X-ray absorption spectroscopy and Eu3+-emission characteristics in GaAs/SnO2 heterostructure

et al. 2020

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X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) data are used for investigating heterostructure samples of GaAs/SnO 2. XANES data are used for analyzing the local organization around Eu in the heterostructure formed by GaAs and Eu-doped SnO 2. The differences between the XANES data for these samples and data obtained for Eu-doped SnO 2 thin films, deposited on glass substrate, are assumed as responsible for the differences in the photoluminescence (PL) spectra concerning the Eu 3+ emission, since films deposited on glass substrate do not present Eu 3+ PL transitions until the annealing temperature is rather high. Eu 3+ emission is explored using two different excitation sources: 350 nm from a Kr + laser (above SnO 2 energy bandgap) and 488 nm from an Ar + laser (below SnO 2 bandgap energy). The existence of more organized regions around the Eu 3+ site observed for the heterostructure surface may be associated with the Eu 3+ luminescent emission. The main and secondary features in the XANES show that there are differences in the average local Eu environment for the SnO 2 :Eu isolated thin films and heterostructures, being more organized in the latter. Electrical characterization evidences that the portion of the resistivity reduction that corresponds to photo-ionized intrabandgap states is responsible for the persistent photoconductivity phenomenon in the heterostructures.

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Structural, optical and electrical properties of Nd-doped SnO2 thin films fabricated by reactive magnetron sputtering for solar cell devices

Cited by 62 publications

References 39 publications

Ethyl Acetate Abatement on Copper Catalysts Supported on Ceria Doped with Rare Earth Oxides

Ethyl Acetate Abatement on Copper Catalysts Supported on Ceria Doped with Rare Earth Oxides

Towards Efficient Spectral Converters through Materials Design for Luminescent Solar Devices

X-ray absorption spectroscopy and Eu3+-emission characteristics in GaAs/SnO2 heterostructure

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