Efficient near-infrared quantum cutting by cooperative energy transfer in Bi3TeBO9:Nd3+ phosphors

Abstract An efficient near-infrared quantum cutting process by cooperative down-conversion of active Bi3+ and Nd3+ ions was demonstrated in Bi3TeBO9:Nd3+ phosphors. In particular, the near-infrared emission of Nd3+ ions enhanced by Bi3+ ions of a series of novel Bi3TeBO9:Nd3+ microcrystalline powders doped with Nd3+ ions in various concentrations was investigated. In order to investigate the luminescent properties of BTBO:Nd3+ powders, the excitation and emission spectra and the fluorescence decay time were measured and analyzed. In particular, the emission of Bi3TeBO9:Nd3+ at 890 and 1064 nm was excited at 327 nm (via energy transfer from Bi3+ ions) and at 586.4 nm (directly by Nd3+ ions). The highest intensity emission bands in near-infrared were detected in the spectra of Bi3TeBO9:Nd3+ doped with 5.0 and 0.5 at.% of Nd3+ ions upon excitation in ultraviolet and visible spectral range, respectively. The fluorescence decay lifetime monitored at 1064 nm for Bi3TeBO9:Nd3+ powders shows the single- or double-exponential character depending on the concentrations of Nd3+ ions. The possible mechanisms of energy relaxation after excitation Bi3TeBO9:Nd3+ powders in ultraviolet or visible spectral range were discussed. The investigated Bi3TeBO9:Nd3+ phosphors efficiently concentrate the ultraviolet/visible radiation in the near-infrared spectral range and can be potentially used as effective spectral converters. Graphical abstract

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Downconversion for Solar Cells in Sr3Gd(PO4)3:Tb, Yb Phosphors

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.502.136 ◽

2012 ◽

Vol 502 ◽

pp. 136-139 ◽

Cited By ~ 3

Author(s):

Jia Yue Sun ◽

Yi Ning Sun ◽

Ji Cheng Zhu ◽

Jun Hui Zeng ◽

Hai Yan Du

Keyword(s):

Energy Transfer ◽

Solar Cell ◽

Near Infrared ◽

Emission Spectra ◽

Fluorescence Decay ◽

Quantum Cutting ◽

Silicon Based ◽

Visible Photon ◽

Co Doped ◽

Cooperative Energy

An efficient near-infrared (NIR) quantum cutting (QC) Tb3+ and Yb3+ co-doped phosphor Sr3Gd(PO4)3 has been synthesized by conventional high temperature solid technique. Upon excitation of Tb3+ with a visible photon at 485 nm, two NIR photons could be emitted by Yb3+ through cooperative energy transfer (CTE) from Tb3+ to two Yb3+ ions. Excitation and emission spectra as well as ﬂuorescence decay measurements have been carried out to examine the occurrence of cooperative energy transfer (CET ) from Tb3+ to Yb3+ ions. The result indicates Tb3+ and Yb3+ co-doped Sr3Gd(PO4)3 is potentially used as down-converter layer in silicon-based solar cell.

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Near Infrared Quantum Cutting of Tb3+–Yb3+ Co-Doped CeF3 Nanophosphors

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2016.11880 ◽

2016 ◽

Vol 16 (4) ◽

pp. 3577-3582

Author(s):

Sun Xiao ◽

Hu Xiao-Yun ◽

Hou Wen-Qian ◽

Fan Jun ◽

Miao Hui ◽

...

Keyword(s):

Energy Transfer ◽

Solar Cells ◽

Near Infrared ◽

Emission Spectra ◽

Infrared Emission ◽

Emission Area ◽

Energy Transfers ◽

Quantum Cutting ◽

Near Infrared Emission ◽

Co Doped

In this paper, Tb3+–Yb3+ Co-doped CeF3 nanophosphors were synthesized using the microwave-assisted heating hydrothermal method (M–H). The excitation and emission spectra of the samples at room temperature show that the samples absorb ultraviolet light from 250 nm to 280 nm, and emit light at 300 nm. This corresponds to the transitions from 5D to 4F of Ce3+, 480 nm, 540 nm, 583 nm, 620 nm which correspond to the transitions from 5D4 to 7F6,5,4,3 of Tb3+, 973 nm which corresponds to the transitions from 2F5/2–2F7/2 of Yb3+. In the emission spectra, it is clear that the emission intensity of Ce3+ and Tb3+ decreases, and Yb3+ increases with increasing Yb3+. This suggests that energy transfer from Ce3+ to Yb3+, and Ce3+ to Tb3+ to Yb3+ may occur. In the near infrared emission area, it is noted that a distinct emission centered at 973 nm was observed under 260 nm excitation. This is due to transitions among the different Stark levels of 2FJ(J=5/2, 7/2) Yb3+ ions. This also suggests an energy transfer from Ce3+ ions to Tb3+ and then to Yb3+. The energy transfers from Tb3+–Yb3+ Co-doped CeF3 nanophosphors, which lead to intense NIR emissions at 900–1050 nm, match the energy of Si band gaps of Si-based solar cells. Therefore, these kinds of materials are promising candidates for applications that require modifying if solar spectrums and enhancement of conversion efficiency of Si-based solar cells.

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Tunable near-infrared emission of binary nano- and mesoscale GUMBOS

RSC Advances ◽

10.1039/c4ra03256j ◽

2014 ◽

Vol 4 (54) ◽

pp. 28471-28480 ◽

Cited By ~ 11

Author(s):

Atiya N. Jordan ◽

Noureen Siraj ◽

Susmita Das ◽

Isiah M. Warner

Keyword(s):

Energy Transfer ◽

Near Infrared ◽

Resonance Energy Transfer ◽

Resonance Energy ◽

Emission Spectra ◽

Infrared Emission ◽

Förster Resonance Energy Transfer ◽

Near Infrared Emission ◽

Tunable Emission ◽

Förster Resonance

Mixtures of GUMBOS were used to form binary nanomaterials with tunable emission spectra due to Förster resonance energy transfer (FRET).

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Near Infrared Quantum Cutting for Solar Cells in CeF3:Yb3+ Nanophosphors

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.366.215 ◽

2011 ◽

Vol 366 ◽

pp. 215-218 ◽

Cited By ~ 1

Author(s):

Su Wen Li

Keyword(s):

Solar Cells ◽

Near Infrared ◽

Emission Spectra ◽

Infrared Emission ◽

Photoluminescence Properties ◽

X Ray Diffraction ◽

Excitation Spectra ◽

Transmission Electron ◽

Nir Emission ◽

Quantum Cutting

The CeF3 nanophosphors with Yb3+ concentrations from 0 to 8% had been prepared by hydrothermal method and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscopy (TEM). Their photoluminescence properties including excitation spectra, Uv-visibe and near infrared (NIR) emission spectra and fluorescence dynamics were studied. In the CeF3: Yb3+ nanophosphors an intensity infrared emission originated from Yb3+2F5/2 - 2F7/2 transition at 900-1050 nm matching to the energy of Si band gap of Si-based solar cells was observed under the excitation of 5d level of Ce3+. The lifetime of Ce3+ decreases and the quantum efficiency (QE) increases with increasing Yb3+ concentration.

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Spectroscopy and Near-Infrared to Visible Upconversion of Er3+ Ions in Aluminosilicate Glasses Manufactured with Controlled Optical Transmission

Applied Sciences ◽

10.3390/app11031137 ◽

2021 ◽

Vol 11 (3) ◽

pp. 1137

Author(s):

Daniel Sola ◽

Adrián Miguel ◽

Eduardo Arias-Egido ◽

Jose I. Peña

Keyword(s):

Energy Transfer ◽

Spectral Range ◽

Optical Transmission ◽

Near Infrared ◽

Upconversion Luminescence ◽

Excited State Absorption ◽

Visible Spectral Range ◽

Excitation Spectra ◽

Aluminosilicate Glasses ◽

Energy Transfer Upconversion

In this work we report on the spectroscopic properties and the near-infrared to visible upconversion of Er3+ ions in aluminosilicate glasses manufactured by directionally solidification with the laser floating zone technique. Glasses were manufactured in a controlled oxidizing atmosphere to provide them with high optical transmission in the visible spectral range. Absorption and emission spectra, and lifetimes were assessed in both the visible and the near infrared spectral range. Green upconversion emissions of the 2H11/2→4I15/2 and 4S3/2→4I15/2 transitions at 525 nm and 550 nm attributed to a two-photon process were observed under excitation at 800 nm. Mechanisms responsible for the upconversion luminescence were discussed in terms of excited state absorption and energy transfer upconversion processes. Excitation spectra of the upconverted emission suggest that energy transfer upconversion processes are responsible for the green upconversion luminescence.

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Enhanced visible to near-infrared quantum cutting in Tb and Yb co-doped oxyfluoride glass-ceramic

MRS Proceedings ◽

10.1557/opl.2012.1448 ◽

2012 ◽

Vol 1471 ◽

Author(s):

Z. Pan ◽

G. Sekar ◽

R. Akrobetu ◽

R. Mu ◽

S. H. Morgan

Keyword(s):

Energy Transfer ◽

Glass Ceramic ◽

Near Infrared ◽

Glass Ceramics ◽

Infrared Emission ◽

Rare Earth Ions ◽

Cutting Effect ◽

Quantum Cutting ◽

Silicon Based ◽

Co Doped

ABSTRACTTb and Yb co-doped oxyfluoride glasses were fabricated in a lithium-lanthanum-aluminosilicate matrix by a melt-quench technique. Glass-ceramics were obtained by appropriate heat treatment of the as-prepared glasses. Visible to near-infrared down-conversion quantum cutting was studied for samples with different thermal annealing temperatures and time. Laser light at 488 nm was used to excite Tb3+ ions while Yb3+ ions were excited by energy transfer from the excited Tb3+ ions. Near-infrared emission at 940 – 1020 nm was observed. It has been found that the emission at 940 – 1020 nm increased significantly from the glass-ceramic compared to that of the as-prepared glass. This result suggests that the energy-transfer efficiency increases in glass-ceramics compared to that in glass. A significant portion of rare-earth ions may be incorporated inside LaF3 nanoparticles (NPs) in the glass-ceramic. Because the Yb3+ emission at 940 – 1020 nm is matched well with the band gap of crystalline Si, the quantum cutting effect may have its potential application in silicon-based solar cells.

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Optimization of the Synthesis and Energy Transfer of Ca2MgWO6:Cr3+,Nd3+

Inorganics ◽

10.3390/inorganics9040023 ◽

2021 ◽

Vol 9 (4) ◽

pp. 23

Author(s):

Viktor Anselm ◽

Thomas Jüstel

Keyword(s):

Energy Transfer ◽

Near Infrared ◽

Raw Materials ◽

Broad Band ◽

Line Emission ◽

Infrared Emission ◽

Infrared Range ◽

Visible Radiation ◽

Solid State Method ◽

Efficient Energy Transfer

This work pertains to Cr3+ and Nd3+ co-activated Ca2MgWO6 phosphors synthesized by high temperature solid-state method using oxides and carbonates as raw materials. All luminescent samples according to Ca2MgWO6:Cr3+,Nd3+ include Cr3+ for the absorption of UV and visible radiation (230–800 nm) prior to energy transfer to Nd3+. As a result of the energy transfer between Cr3+ and Nd3+, we observe line emission originating from Nd3+ in the near infrared range additionally to the broad band near infrared emission from Cr3+ assigned to the spin-allowed 4T2 → 4A2 transition. The energy transfer from Cr3+ to Nd3+ is discussed via the variations of the lifetime data of Cr3+ and Nd3+. The strong absorption of Cr3+ in the ultraviolet range and the efficient energy transfer from Cr3+ to Nd3+ indicate that the herein presented material type can serve as a radiation converter for near infrared region light emitting diodes (NIR-LEDs) comprising an UV-A emitting (Al,Ga)N chip.

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Upconversion Luminescence of Silica–Calcia Nanoparticles Co-doped with Tm3+ and Yb3+ Ions

Materials ◽

10.3390/ma14040937 ◽

2021 ◽

Vol 14 (4) ◽

pp. 937

Author(s):

Katarzyna Halubek-Gluchowska ◽

Damian Szymański ◽

Thi Ngoc Lam Tran ◽

Maurizio Ferrari ◽

Anna Lukowiak

Keyword(s):

Energy Transfer ◽

Near Infrared ◽

Upconversion Luminescence ◽

Sol Gel ◽

Emission Spectra ◽

Transmission Electron ◽

Characteristic Emission ◽

Diffraction Patterns ◽

Size Of Particles ◽

Average Size

Looking for upconverting biocompatible nanoparticles, we have prepared by the sol–gel method, silica–calcia glass nanopowders doped with different concentration of Tm3+ and Yb3+ ions (Tm3+ from 0.15 mol% up to 0.5 mol% and Yb3+ from 1 mol% up to 4 mol%) and characterized their structure, morphology, and optical properties. X-ray diffraction patterns indicated an amorphous phase of the silica-based glass with partial crystallization of samples with a higher content of lanthanides ions. Transmission electron microscopy images showed that the average size of particles decreased with increasing lanthanides content. The upconversion (UC) emission spectra and fluorescence lifetimes were registered under near infrared excitation (980 nm) at room temperature to study the energy transfer between Yb3+ and Tm3+ at various active ions concentrations. Characteristic emission bands of Tm3+ ions in the range of 350 nm to 850 nm were observed. To understand the mechanism of Yb3+–Tm3+ UC energy transfer in the SiO2–CaO powders, the kinetics of luminescence decays were studied.

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