Quantum cutting mechanism in NaYF_4:Tb^3+, Yb^3+

Duan, Qianqian; Qin, Feng; Zhang, Zhiguo; Cao, Wenwu

doi:10.1364/ol.37.000521

Cited by 47 publications

(26 citation statements)

References 13 publications

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“…[244][245][246][247][248][249] Some researchers believed that a nonlinear second-order downconversion process should be responsible for the cooperative quantum-cutting (Fig. 14a).…”

Section: Narrowband Quantum-cutting For C-si Solar Cellsmentioning

confidence: 99%

Enhancing solar cell efficiency: the search for luminescent materials as spectral converters

et al. 2013

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Photovoltaic (PV) technologies for solar energy conversion represent promising routes to green and renewable energy generation. Despite relevant PV technologies being available for more than half a century, the production of solar energy remains costly, largely owing to low power conversion efficiencies of solar cells. The main difficulty in improving the efficiency of PV energy conversion lies in the spectral mismatch between the energy distribution of photons in the incident solar spectrum and the bandgap of a semiconductor material. In recent years, luminescent materials, which are capable of converting a broad spectrum of light into photons of a particular wavelength, have been synthesized and used to minimize the losses in the solar-cell-based energy conversion process. In this review, we will survey recent progress in the development of spectral converters, with a particular emphasis on lanthanide-based upconversion, quantum-cutting and down-shifting materials, for PV applications. In addition, we will also present technical challenges that arise in developing cost-effective high-performance solar cells based on these luminescent materials.

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“…[244][245][246][247][248][249] Some researchers believed that a nonlinear second-order downconversion process should be responsible for the cooperative quantum-cutting (Fig. 14a).…”

Section: Narrowband Quantum-cutting For C-si Solar Cellsmentioning

confidence: 99%

Enhancing solar cell efficiency: the search for luminescent materials as spectral converters

et al. 2013

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“…According to the literature, non-linear dependence of luminescence intensity versus excitation power evidences second-order nonlinear quantum cutting process with energy transfer through a virtual energy level [32]. In turn, linear dependence in the case of t-ZrO 2 can be explained by the cooperative energy transfer process from 5 D 4 (Tb 3+ ) to Yb 3+ [32]. However, the existence of a unique energy transfer in the case of t-ZrO 2 is not irrefutable proof of the quantum cutting process.…”

Section: T-zro2mentioning

confidence: 99%

Devitrification Behavior of Sol-Gel Derived ZrO2-SiO2 Rare-Earth Doped Glasses: Correlation between Structural and Optical Properties

et al. 2018

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Optical and structural properties of glasses and glass-ceramics (GC) obtained by different heat-treatment of Tb and Tb-Yb doped sol-gel derived 30ZrO2-70SiO2 materials were investigated. A glass was formed after treatment at 700 °C whereas devitrification of the media after the treatment at 1000 and 1100 °C, led to the formation of GC containing up to three different crystalline phases, namely, tetragonal ZrO2, Yb-disilicate and cristobalite. The modification of the optical properties through the heat treatment was caused by redistribution of the rare earth elements (REE) among the different phases: both Tb and Yb entered the t-ZrO2 lattice, Yb can also be present in the form of a Yb2Si2O7 crystal. Devitrification led to an increase in Tb→Yb energy transfer efficiency as compared to the glass, though it was higher in the samples heat-treated at 1000 °C than in those treated at 1100 °C. The most intensive Yb3+ luminescence, induced by the energy transfer from the Tb3+ ion, was observed at the interface between t-ZrO2 and the glassy phases, due to the high concentration of REE in this area caused by the inability of ZrO2 to accept larger amounts of the REE. The mechanisms of the Tb→Yb energy transfer vary between different phases of the GC. The results obtained in this study are important for the development of spectral down-converters for potential solar energy applications based on Tb-Yb co-doped glass-ceramics.

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“…These phenomena, so called quantum-cutting effects, has been analysed for (in) different optical systems [10][11]. However, using the mechanism of energy transfer with upconversion in RE ions is more effective approach to obtain visible laser or amplified spontaneous emission (ASE) under infrared radiation (IR) pumping.…”

Section: Introductionmentioning

confidence: 99%

“…It has to be noted that development of upconversion fiber source, entails the elaboration of thermally stable, low phonon energy host glass which meets the optical and fibre technology requirements. Tellurite glasses, thanks to a good solubility of rare earth elements (2 mol %) as well as a low phonon energy (780 cm -1 ) enable an effective conversion of IR radiation to VIS radiation and make an alternative to fluoride as well as to HMO glasses [10][11][12][13][14]. Moreover, good mechanical properties as well as high thermal stability makes it possible to form them into optical fibers.…”

Section: Introductionmentioning

confidence: 99%

Upconversion luminescence of Yb³⁺/Tb³⁺co-doped tellurite glasses

et al. 2014

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In the article the upconversion luminescence ofTeO 2 -GeO 2 -PbO -PbF 2 -BaO -Nb 2 O 5 -LaF 3 glass system co-doped withYb 3+ /Tb 3+ under 976 nm laser diode excitation was investigated. The influence of Tb 2 O 3 concentration on the luminescent properties was determined. Measured strong luminescence at492, 547, 588, 622 nm correspond to 5 D 4 → 7 F J (J=6, 4, 3) transitions. Energy transfer (ET) mechanism involved in observed emission was discussed. The highest upconversion emission intensity was obtained in the tellurite glass co-doped with 0.5 Yb 2 O 3 /0.5 Tb 2 O 3 (mol%).

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Quantum cutting mechanism in NaYF_4:Tb^3+, Yb^3+

Cited by 47 publications

References 13 publications

Enhancing solar cell efficiency: the search for luminescent materials as spectral converters

Enhancing solar cell efficiency: the search for luminescent materials as spectral converters

Devitrification Behavior of Sol-Gel Derived ZrO2-SiO2 Rare-Earth Doped Glasses: Correlation between Structural and Optical Properties

Upconversion luminescence of Yb³⁺/Tb³⁺co-doped tellurite glasses

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Quantum cutting mechanism in NaYF_4:Tb^3+, Yb^3+

Cited by 47 publications

References 13 publications

Enhancing solar cell efficiency: the search for luminescent materials as spectral converters

Enhancing solar cell efficiency: the search for luminescent materials as spectral converters

Devitrification Behavior of Sol-Gel Derived ZrO2-SiO2 Rare-Earth Doped Glasses: Correlation between Structural and Optical Properties

Upconversion luminescence of Yb3+/Tb3+co-doped tellurite glasses

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Upconversion luminescence of Yb³⁺/Tb³⁺co-doped tellurite glasses