Synthesis of co-doped Yb 3+ -Er 3+ :ZrO 2 upconversion nanoparticles and their applications in enhanced photovoltaic properties of quantum dot sensitized solar cells

Ramachari, D.; Esparza, Diego; López–Luke, Tzarara; Romero, V. H.; Perez-Mayen, Leonardo; Rosa, E. De la; Jayasankar, C.K.

doi:10.1016/j.jallcom.2016.12.026

Cited by 47 publications

(13 citation statements)

References 68 publications

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“…Similar profiles with the same peak positions of green and red emissions are observed when comparing the powder phase and the deposited film, indicating that basic optical behaviour of the upconversion nanoparticles has not been changed and that is further confirmed by the presence of the same structure (anatase phase) and elementary size. Many factors are responsible for the changing of the red / green ratio for Er 3+ doped upconversion materials, such as site symmetry, coordination number, interatomic distance, shaping material [65][66][67][68]. Meanwhile, the change in intensity could be related to the change of the environment when particles are connected to n-type (100) Si surface.…”

Section: Up-conversion Emission Of Nanoparticles and Thin Filmmentioning

confidence: 99%

Synthesis of upconversion TiO2:Er3+-Yb3+ nanoparticles and deposition of thin films by spin coating technique

Trabelsi

Mercier

Blanquet

et al. 2020

Ceramics International

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In this work, a simple, low temperature (T<300°C) procedure suitable to increase the efficiency of solar cell and optoelectronic devices through reducing the mismatch with solar spectrum in the infrared range is proposed. TiO 2 co-doped with rare earth ions is a promising candidate for its use in optical field due to the possibility to expand the spectral absorption range. Here, pure and Er 3+ -Yb 3+ co-doped anatase-TiO 2 nano-spherical particles (diameter < 50 nm) with high surface area (125.7 m 2 /g and 140.6 m 2 /g for the pure and co-doped, respectively), good crystallinity are prepared by hydrothermal-assisted sol-gel method, followed by their dispersion and deposition as thin films. The nanoparticles are characterized by studying their structural, morphology, surface chemical compositions and photoluminescent properties. From the dispersion study, results showed that the optimal conditions were obtained for co-doped TiO 2 at operational pH=3 and with 20 min as a suitable duration of ultrasonication. The co-doped TiO 2 nanoparticles showed excellent upconversion properties (green and red emissions) at room temperature under 980 nm excitation. To extend this result towards optoelectronic and photonic applications, the upconversion nanoparticles are deposited at the surface of n-type (100) Si wafer using a spincoating process. From scanning electron microscopy, it is observed that the entire surface of substrate is covered with a uniform film composed of compact arrangement of small nanoparticles with a good adhesion on Si surface, also the resulting 750 nm thick TiO 2 :Er-Yb film maintained the upconversion luminescence phenomena.

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Section: Up-conversion Emission Of Nanoparticles and Thin Filmmentioning

confidence: 99%

Synthesis of upconversion TiO2:Er3+-Yb3+ nanoparticles and deposition of thin films by spin coating technique

Trabelsi

Mercier

Blanquet

et al. 2020

Ceramics International

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“…Rare earth ion (Re 3+ )-doped materials emitting upconversion luminescence (UCL) have attracted increasing attention owing to their wide application potentials in super-resolution nanoscopy [ 1 ], visible and ultraviolet lasers [ 2 ], 3-D volumetric display [ 3 ], information security [ 4 ], photovoltaic devices [ 5 ], cancer therapy [ 6 ], anti-counterfeiting [ 7 ], and biological fluorescence labeling [ 8 ]. Appropriate hosts and activators are of vital importance for achieving desired UCL performances.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms of Upconversion Luminescence of Er3+-Doped NaYF4 via 980 and 1530 nm Excitation

et al. 2021

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To date, the mechanisms of Er3+ upconversion luminescence via 980 and 1530 nm excitation have been extensively investigated; however, based on discussions, they either suffer from the lack of convincing evidence or require elaborated and time-consuming numerical simulations. In this work, the steady-state and time-resolved upconversion luminescence data of Er3+-doped NaYF4 were measured; we therefore investigated the upconversion mechanisms of Er3+ on the basis of the spectroscopic observations and the simplified rate equation modeling. This work provides a relatively simple strategy to reveal the UCL mechanisms of Er3+ upon excitation with various wavelengths, which may also be used in other lanthanide ion-doped systems.

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“…In addition, the ZrO2 might be a good spectrum modifying matrix serving as a photon-conversion and an electron transporting layer. Therefore, the over coating of co-doped Yb-3p and Er-3p have the wide band gap value (4-6 eV) of the material ZrO2 [26][27]. The charge recombination participates to the loss of charge carriers and therefore decreases the photovoltaic performance of the cell [28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Doping effect of sulfur substituting on Zirconium dioxide ZrO2

Idrissi¹,

ziti²,

Labrim³

et al. 2020

Preprint

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Synthesis of co-doped Yb 3+ -Er 3+ :ZrO 2 upconversion nanoparticles and their applications in enhanced photovoltaic properties of quantum dot sensitized solar cells

Cited by 47 publications

References 68 publications

Synthesis of upconversion TiO2:Er3+-Yb3+ nanoparticles and deposition of thin films by spin coating technique

Synthesis of upconversion TiO2:Er3+-Yb3+ nanoparticles and deposition of thin films by spin coating technique

Mechanisms of Upconversion Luminescence of Er3+-Doped NaYF4 via 980 and 1530 nm Excitation

Doping effect of sulfur substituting on Zirconium dioxide ZrO2

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