Upconversion dynamics of Er3+:YAlO3

Simkin, D. J.; Koningstein, J. A.; Myśliński, P.; Boothroyd, Simon; Chrostowski, J.

doi:10.1063/1.354092

Cited by 26 publications

(16 citation statements)

References 13 publications

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“…Fitting the experimental data points of Figure to Equation yields W ETU = 6.3 × 10 −19 cm 3 s −1 . This energy transfer parameter is one order of magnitude smaller than the one for Er 3+ ‐doped Y 3 Al 5 O 12 , and three orders of magnitude smaller than the values measured for Nd 3+ ‐doped LiYF 4 and Y 3 Al 5 O 12 by Pollnau et al and Guyot et al , respectively, in accordance with the higher oscillator strength in Nd 3+ .…”

Section: Resultsmentioning

confidence: 49%

Upconversion Dynamics in Er³⁺‐Doped Gd₂O₂S: Influence of Excitation Power, Er³⁺ Concentration, and Defects

Martín-Rodríguez

Rabouw

Trevisani

et al. 2015

Advanced Optical Materials

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Upconversion (UC) enables the conversion of lower energy to higher energy photons and has gained interest for the application in solar cells and nanocrystal biolabels. Er3+‐doped Gd2O2S is a highly promising UC material for applications. A record UC quantum yield of 12% was recently measured in Gd2O2S doped with 10% Er3+ upon monochromatic excitation into the 4I13/2 state at 1510 nm for moderate excitation densities (700 W m−2). In this work, the focus is on the dynamics of the infrared (4I13/2, ≈1500 nm) to near‐infrared (4I11/2, ≈1000 nm) UC luminescence in Er3+‐doped Gd2O2S. On the basis of luminescence spectra (emission and excitation), UC emission decay curves, and rate equation modeling, it is shown that energy transfer upconversion (ETU) is the mechanism responsible for the 4I11/2 UC luminescence, and the ETU parameter for Gd2O2S:10%Er3+ is determined to be W ETU = 6.3 × 10−19 cm3 s−1. The UC dynamics depend on the Er3+ concentration and, similar to triplet–triplet annihilation UC in organic materials, on the excitation power. The results highlight the subtle balance between desired energy transfer processes leading to ETU and undesired energy migration to quenching sites. The overall UC efficiency is dependent not only on the material and composition but also on the synthesis process.

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Section: Resultsmentioning

confidence: 49%

Upconversion Dynamics in Er³⁺‐Doped Gd₂O₂S: Influence of Excitation Power, Er³⁺ Concentration, and Defects

Martín-Rodríguez

Rabouw

Trevisani

et al. 2015

Advanced Optical Materials

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“…The highest value for W ETU found in the literature is 2.38 × 10 −15 cm 3 s −1 from the work of Liu et al on β-NaYF 4 doped with 1.81% Er 3+ , 80 with other reports being several orders of magnitude even lower. 75,[77][78][79]81 It should be noted that Liu et al stated that the photophysical analysis was not able to be applied on β-NaYF 4 material that was highly doped with Er 3+ (in that case 8.39%), due to ion clustering dominating. 80 In line with evaluating the possibilities for UC for solar energy harvesting under a best-case scenario, the value of W ETU = 2.38 × 10 −15 cm 3 s −1 from Liu et al is employed, but this should be viewed as a generous estimation.…”

Section: ̃=mentioning

confidence: 99%

Photon Upconversion for Photovoltaics and Photocatalysis: A Critical Review

et al. 2021

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Opportunities for enhancing solar energy harvesting using photon upconversion are reviewed. The increasing prominence of bifacial solar cells is an enabling factor for the implementation of upconversion, however, when the realistic constraints of current best-performing silicon devices are considered, many challenges remain before silicon photovoltaics operating under nonconcentrated sunlight can be enhanced via lanthanide-based upconversion. A photophysical model reveals that >1–2 orders of magnitude increase in the intermediate state lifetime, energy transfer rate, or generation rate would be needed before such solar upconversion could start to become efficient. Methods to increase the generation rate such as the use of cosensitizers to expand the absorption range and the use of plasmonics or photonic structures are reviewed. The opportunities and challenges for these approaches (or combinations thereof) to achieve efficient solar upconversion are discussed. The opportunity for enhancing the performance of technologies such as luminescent solar concentrators by combining upconversion together with micro-optics is also reviewed. Triplet–triplet annihilation-based upconversion is progressing steadily toward being relevant to lower-bandgap solar cells. Looking toward photocatalysis, photophysical modeling indicates that current blue-to-ultraviolet lanthanide upconversion systems are very inefficient. However, hope remains in this direction for organic upconversion enhancing the performance of visible-light-active photocatalysts.

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“…Among all the trivalent RE ions, Er 3+ ion in solids has the richest spectra in the IR-UV range that makes it more suited for upconversion studies. The visible upconversion luminescence of Er 3+ ion has been investigated extensively in various kinds of host materials and visible upconversion laser has also been achieved in several Er 3+ ion-doped materials by infrared and red laser excitation [7][8][9][10][11][12][13]. UV upconversion luminescence from the higher levels 2 H 9/2 and 2 P 3/2 has also been observed in several Er 3+ -doped materials, including Cd 0.5 Ba 0.3 K 0.2 Cl 1.8 and Zn 0.5 K 0.5 Cl 1.5 glasses, YAG, YAlO 3 and Cs 2 NaYCl 6 crystals under excitation of 4 S 3/2 [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Upconversion luminescence and kinetics in Er3+:YAlO3 under 652.2nm excitation

Dai

Sun

2007

Journal of Luminescence

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Upconversion dynamics of Er3+:YAlO3

Abstract: The dynamics of the green (2H11/12, 4S3/2) and red (4F9/2) upconversion emission excited by 15 ns pulses from an Er:fibre laser at 1500 nm are presented and analyzed. The upconversion process is found to fit a kinetic model, which includes both cross relaxation and energy transfer.

Cited by 26 publications

References 13 publications

Upconversion Dynamics in Er³⁺‐Doped Gd₂O₂S: Influence of Excitation Power, Er³⁺ Concentration, and Defects

Upconversion Dynamics in Er³⁺‐Doped Gd₂O₂S: Influence of Excitation Power, Er³⁺ Concentration, and Defects

Photon Upconversion for Photovoltaics and Photocatalysis: A Critical Review

Upconversion luminescence and kinetics in Er3+:YAlO3 under 652.2nm excitation

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Upconversion dynamics of Er3+:YAlO3

Abstract: The dynamics of the green (2H11/12, 4S3/2) and red (4F9/2) upconversion emission excited by 15 ns pulses from an Er:fibre laser at 1500 nm are presented and analyzed. The upconversion process is found to fit a kinetic model, which includes both cross relaxation and energy transfer.

Cited by 26 publications

References 13 publications

Upconversion Dynamics in Er3+‐Doped Gd2O2S: Influence of Excitation Power, Er3+ Concentration, and Defects

Upconversion Dynamics in Er3+‐Doped Gd2O2S: Influence of Excitation Power, Er3+ Concentration, and Defects

Photon Upconversion for Photovoltaics and Photocatalysis: A Critical Review

Upconversion luminescence and kinetics in Er3+:YAlO3 under 652.2nm excitation

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Upconversion Dynamics in Er³⁺‐Doped Gd₂O₂S: Influence of Excitation Power, Er³⁺ Concentration, and Defects

Upconversion Dynamics in Er³⁺‐Doped Gd₂O₂S: Influence of Excitation Power, Er³⁺ Concentration, and Defects