On the efficient Te4+→Yb3+ cooperative energy transfer mechanism in tellurite glasses: A potential material for luminescent solar concentrators

Souza, Ana Kely Rufino; Langaro, Ana Paula; Silva, J.R.; Costa, Francine Bettio; Yukimitu, K.; Moraes, João Carlos Silos; Nunes, Luiz Antônio de Oliveira; Andrade, Luís Humberto da Cunha; Lima, S.M.

doi:10.1016/j.jallcom.2018.12.038

Cited by 33 publications

(10 citation statements)

References 33 publications

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“…Recently, colloidal Yb 3+ -doped CsPb(Cl 1– x Br x ) 3 NCs (Yb 3+ :CsPb(Cl 1– x Br x ) 3 ) were demonstrated to show extraordinarily high PLQYs in the near-IR sensitized by the photoexcitation of the CsPb(Cl 1– x Br x ) 3 host NC, reaching as high as ∼170%. − These very high PLQYs have been attributed to an extremely efficient quantum-cutting process that converts the energy from one short-wavelength absorbed photon into the energies of multiple longer-wavelength emitted photons. The emissive 2 F 5/2 → 2 F 7/2 f–f transition of Yb 3+ in CsPb(Cl 1– x Br x ) 3 , at ∼980 nm, is aligned very well with the peak energy-conversion efficiency of crystalline Si (c-Si) photovoltaics, suggesting promise for various solar spectral-conversion applications. ,− Solar-energy conversion using quantum cutting has been investigated for many years with other lanthanide-containing luminescent materials, ,,− but Yb 3+ :CsPb(Cl 1– x Br x ) 3 is the first material that combines highly efficient quantum cutting with absorption that is sufficiently strong and broad for practical solar applications.…”

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confidence: 89%

Anion Exchange and the Quantum-Cutting Energy Threshold in Ytterbium-Doped CsPb(Cl_1–xBr_x)₃ Perovskite Nanocrystals

et al. 2019

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Colloidal halide perovskite nanocrystals of CsPbCl3 doped with Yb3+ have demonstrated remarkably high sensitized photoluminescence quantum yields (PLQYs), approaching 200%, attributed to a picosecond quantum-cutting process in which one photon absorbed by the nanocrystal generates two photons emitted by the Yb3+ dopants. This quantum-cutting process is thought to involve a charge-neutral defect cluster within the nanocrystal’s internal volume. We demonstrate that Yb3+-doped CsPbCl3 nanocrystals can be converted postsynthetically to Yb3+-doped CsPb(Cl1–x Br x )3 nanocrystals without compromising the desired high PLQYs. Nanocrystal energy gaps can be tuned continuously from E g ≈ 3.06 eV (405 nm) in CsPbCl3 down to E g ≈ 2.53 eV (∼490 nm) in CsPb(Cl0.25Br0.75)3 while retaining a constant PLQY above 100%. Reducing E g further causes a rapid drop in PLQY, interpreted as reflecting an energy threshold for quantum cutting at approximately twice the energy of the Yb3+ 2F7/2 → 2F5/2 absorption threshold. These data demonstrate that very high quantum-cutting energy efficiencies can be achieved in Yb3+-doped CsPb(Cl1–x Br x )3 nanocrystals, offering the possibility to circumvent thermalization losses in conventional solar technologies. The presence of water during anion exchange is found to have a deleterious effect on the Yb3+ PLQYs but does not affect the nanocrystal shapes or morphologies, or even reduce the excitonic PLQYs of analogous undoped CsPb(Cl1–x Br x )3 nanocrystals. These results provide valuable information relevant to the development and application of these unique materials for spectral-shifting solar energy conversion technologies.

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confidence: 89%

Anion Exchange and the Quantum-Cutting Energy Threshold in Ytterbium-Doped CsPb(Cl_1–xBr_x)₃ Perovskite Nanocrystals

et al. 2019

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“…[ 47 ] The absorption coefficient of ytterbium ions at 1020 nm in crystals is typically close to 1 cm −1 for a 5 at% doping level—this is approximately fourfold lower than found at 976 nm wavelength where the maximum is found. [ 48 ] According to the Lambert–Beer law and for a 2.5 µm thick particle, we estimate a single particle absorbance (the fraction of pump power that is absorbed by the microparticle) to be 2.4 × 10 −4 . This is, indeed, very close to the fraction of incident pump power that is transformed into cooling power.…”

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confidence: 99%

Laser Refrigeration by an Ytterbium‐Doped NaYF₄ Microspinner

Ortiz‐Rivero

Prorok

Martı́n

et al. 2021

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Thermal control of liquids with high (micrometric) spatial resolution is required for advanced research such as single molecule/cell studies (where temperature is a key factor) or for the development of advanced microfluidic devices (based on the creation of thermal gradients at the microscale). Local and remote heating of liquids is easily achieved by focusing a laser beam with wavelength adjusted to absorption bands of the liquid medium or of the embedded colloidal absorbers. The opposite effect, that is highly localized cooling, is much more difficult to achieve. It requires the use of a refrigerating micro‐/nanoparticle which should overcome the intrinsic liquid heating. Remote monitoring of such localized cooling, typically of a few degrees, is even more challenging. In this work, a solution to both problems is provided. Remote cooling in D2O is achieved via anti‐Stokes emission by using an optically driven ytterbium‐doped NaYF4 microparticle. Simultaneously, the magnitude of cooling is determined by mechanical thermometry based on the analysis of the spinning dynamics of the same NaYF4 microparticle. The angular deceleration of the NaYF4 particle, caused by the cooling‐induced increase of medium viscosity, reveals liquid refrigeration by over −6 K below ambient conditions.

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“…Ytterbium( iii ) is deemed valuable for its distinctive near-infrared (NIR) emission attractive for optical applications in lasing 1,2 and spectral converters in photovoltaic cells. 3,4 The application in solar cells has indeed gained increasing attention 3–14 given the growing energy crisis and climate change concerns. 14 Nonetheless, there is a problem in that Yb 3+ ions have a simple energy level structure and cannot directly absorb visible (Vis) or ultraviolet (UV) light.…”

Section: Introductionmentioning

confidence: 99%

Monovalent copper-mediated UV to NIR luminescence down-shifting in Yb³⁺-doped glass

Jiménez

2022

J. Mater. Chem. C

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On the efficient Te4+→Yb3+ cooperative energy transfer mechanism in tellurite glasses: A potential material for luminescent solar concentrators

Cited by 33 publications

References 33 publications

Anion Exchange and the Quantum-Cutting Energy Threshold in Ytterbium-Doped CsPb(Cl_1–xBr_x)₃ Perovskite Nanocrystals

Anion Exchange and the Quantum-Cutting Energy Threshold in Ytterbium-Doped CsPb(Cl_1–xBr_x)₃ Perovskite Nanocrystals

Laser Refrigeration by an Ytterbium‐Doped NaYF₄ Microspinner

Monovalent copper-mediated UV to NIR luminescence down-shifting in Yb³⁺-doped glass

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On the efficient Te4+→Yb3+ cooperative energy transfer mechanism in tellurite glasses: A potential material for luminescent solar concentrators

Cited by 33 publications

References 33 publications

Anion Exchange and the Quantum-Cutting Energy Threshold in Ytterbium-Doped CsPb(Cl1–xBrx)3 Perovskite Nanocrystals

Anion Exchange and the Quantum-Cutting Energy Threshold in Ytterbium-Doped CsPb(Cl1–xBrx)3 Perovskite Nanocrystals

Laser Refrigeration by an Ytterbium‐Doped NaYF4 Microspinner

Monovalent copper-mediated UV to NIR luminescence down-shifting in Yb3+-doped glass

Contact Info

Product

Resources

About

Anion Exchange and the Quantum-Cutting Energy Threshold in Ytterbium-Doped CsPb(Cl_1–xBr_x)₃ Perovskite Nanocrystals

Anion Exchange and the Quantum-Cutting Energy Threshold in Ytterbium-Doped CsPb(Cl_1–xBr_x)₃ Perovskite Nanocrystals

Laser Refrigeration by an Ytterbium‐Doped NaYF₄ Microspinner

Monovalent copper-mediated UV to NIR luminescence down-shifting in Yb³⁺-doped glass