High Nd<sup>3+</sup>→Yb<sup>3+</sup> energy transfer efficiency in tungsten‐tellurite glass: A promising converter for solar cells

Costa, Francine Bettio; Yukimitu, K.; Nunes, Luiz Antônio de Oliveira; Figueiredo, Marcio da Silva; Silva, J.R.; Andrade, Luís Humberto da Cunha; Lima, S.M.; Moraes, João Carlos Silos

doi:10.1111/jace.14770

Cited by 25 publications

(6 citation statements)

References 32 publications

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“…The aspects considered in this discussion indicate that the combination of several features could be more effective to increase energy production in SC's than the attempt to surpass the SQ limit, and even though our analysis here was applied to TWNN glass, it is not restricted to this material. Other tellurites have been investigated with particular focus on the description of the quantum efficiencies [35,49,50,51]. However, such specific analysis may lead to incorrect conclusions.…”

Section: Discussionmentioning

confidence: 99%

Glass engineering to enhance Si solar cells: a case study of Pr$^{3+}$-Yb$^{3+}$ codoped tellurite-tungstate as spectral converter

Taniguchi,

Zanuto,

Portes

et al. 2019

Preprint

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Spectral converters are known to increase photovoltaic energy conversion by minimizing losses due to fundamental non-absorption and thermalization processes, and have been suggested to surpass the Shockley-Queisser efficiency limit in single junction solar cells. Here we present a detailed spectroscopic study of photoluminescence in tellurite-tungstate glasses doped and codoped with P r 3+ − Y b 3+ and Ag nanoparticles. The energy transfer mechanisms between P r 3+ and Y b 3+ are discussed based on the near infrared emission under excitation at 442 nm and on the upconversion emission under excitation at 980 nm. Fluorescence quenching of 2 F 5/2 level of Y b 3+ is observed by increasing the concentration of P r 3+ , as well as by the addition of Ag nanoparticles. In addition, a discussion on the potential of this glass to increase energy production in spectral converters is presented. The results suggest that the few undesirable energy transfer processes occurring in this material are difficult to be controlled or eliminated properly, resulting in intrinsic losses. This discussion is extended to the potential of glass science to enhance energy production in solar cells, showing that newer designs such as

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Section: Discussionmentioning

confidence: 99%

Glass engineering to enhance Si solar cells: a case study of Pr$^{3+}$-Yb$^{3+}$ codoped tellurite-tungstate as spectral converter

Taniguchi,

Zanuto,

Portes

et al. 2019

Preprint

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“…TeO 2 -based glass can be used as a host material for the efficiency enhancement of the energy transfer mechanism from a Nd 3+ to Yb 3+ phosphor. Rare earth-doped glass is becoming useful for the development of high-power fiber lasers. − The energy transfer mechanism for Nd 3+ /Yb 3+ codoped tellurite glass was studied by Costa et al The Nd 3+ NIR fluorescence is completely replaced when concentration of Yb 3+ ions (4 mol %) is at a maximum in the host material. A corresponding increase in the Yb 3+ emission intensity at 980 nm is observed due to nonradiative decay heat generation rate reduction, indicating a high energy transfer efficiency of Nd 3+ to Yb 3+ .…”

Section: Several Methods and Techniques For Enhancing Solar Cell Effi...mentioning

confidence: 99%

Synthesis and Luminescence Characterization of Downconversion and Downshifting Phosphor for Efficiency Enhancement of Solar Cells: Perspectives and Challenges

Satpute

Mehare

Tiwari

et al. 2022

ACS Appl. Electron. Mater.

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Currently, the world is facing an energy crisis. One of the techniques to fulfill the energy demand is to increase the utilization of solar energy. For harvesting solar energy in large amounts, it is essential to develop efficient solar cells. Notably, solar cells (photovoltaic cells) produce electricity from solar energy. The biggest hurdles, however, are the capability and reliability of solar cells. Poor energy density and the spectrum in the bandgap of semiconductor phosphors do not match the energy allocation of the photons in solar spectra lines. These issues and cell efficacy must be addressed before photovoltaic cells can be developed as a viable source of electrical power. The amount of energy generated per unit area depends linearly on cell efficiency. Hence, it makes sense to increase the efficiency rather than enhancing the space for solar cell installation. One well-known method for converting a high-energy photon into two or more lower-energy photons is “downconversion”, which makes use of the wide solar spectrum required for solar cells. The design maximizes the use of the entire sunlight spectrum, improving the efficiency of various solar cell types. This review article surveys how spectrum converters, especially lanthanide-based downconverters and downshifters will be developed. This review focuses on the current materials and methods used to enable the downconversion and downshifting processes in solar cells and some of the challenges in developing solar cells.

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“…This fact paves the way for the optical temperature measurement based on rare-earth double-doped phosphors. However, there is another interesting energy transfer process called cross-relaxation [6,7]. For example, cross-relaxation in the Nd 3+ ,Yb 3+ :LiYF 4 system is possible under Nd 3+ excitation at 355 nm (( 2 F 7/2 -2 F 5/2 (Yb 3+ ) and 2 K 15/2 / 4 G 11/2 -4 F 3/2 (Nd 3+ )).…”

Section: Introductionmentioning

confidence: 99%

Optical Temperature Sensors Based on Down-Conversion Nd3+,Yb3+:LiYF4 Microparticles

et al. 2023

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Nd3+ (0.3 mol.%), Yb3+ (0, 1, 2, 3 and 5 mol.%): LiYF4 phosphors were grown by the Bridgman–Stockbarger technique. The luminescence intensity ratio (LIR) of Nd3+ (4F3/2–4I9/2, ~866 nm) and Yb3+ emission (2F5/2–2F7/2, ~980 nm) was taken as a parameter. The energy exchange between 4F3/2 (Nd3+) and 2F5/2 (Yb3+) occurs via phonons, which elucidates the LIR temperature dependence. The influence of the cross-relaxation process on the temperature sensitivity was estimated as negligible. The LIR function depends on the Yb3+ concentration at a fixed 0.3 mol.% Nd3+. The maximum Sa and Sr value were reached for Nd3+ (0.3%), Yb3+ (1.0%): LiYF4 (Sa = 0.007 K−1 at 320 K) and Nd3+ (0.3%), Yb3+ (5.0%): LiYF4 (Sr = 1, 1.03%*K−1 at 260 K), respectively.

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High Nd³⁺→Yb³⁺ energy transfer efficiency in tungsten‐tellurite glass: A promising converter for solar cells

Cited by 25 publications

References 32 publications

Glass engineering to enhance Si solar cells: a case study of Pr$^{3+}$-Yb$^{3+}$ codoped tellurite-tungstate as spectral converter

Glass engineering to enhance Si solar cells: a case study of Pr$^{3+}$-Yb$^{3+}$ codoped tellurite-tungstate as spectral converter

Synthesis and Luminescence Characterization of Downconversion and Downshifting Phosphor for Efficiency Enhancement of Solar Cells: Perspectives and Challenges

Optical Temperature Sensors Based on Down-Conversion Nd3+,Yb3+:LiYF4 Microparticles

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High Nd3+→Yb3+ energy transfer efficiency in tungsten‐tellurite glass: A promising converter for solar cells

Cited by 25 publications

References 32 publications

Glass engineering to enhance Si solar cells: a case study of Pr$^{3+}$-Yb$^{3+}$ codoped tellurite-tungstate as spectral converter

Glass engineering to enhance Si solar cells: a case study of Pr$^{3+}$-Yb$^{3+}$ codoped tellurite-tungstate as spectral converter

Synthesis and Luminescence Characterization of Downconversion and Downshifting Phosphor for Efficiency Enhancement of Solar Cells: Perspectives and Challenges

Optical Temperature Sensors Based on Down-Conversion Nd3+,Yb3+:LiYF4 Microparticles

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High Nd³⁺→Yb³⁺ energy transfer efficiency in tungsten‐tellurite glass: A promising converter for solar cells