Temperature Dependent Energy Transfer in Ce<sup>3+</sup>-Yb<sup>3+</sup>Co-Doped YAG Phosphors

Li, Lu; Lou, Chaogang; Sun, Xuemei; Xie, Yufei; Lin, Haiqing; Kumar, K. Santhosh

doi:10.1149/2.0281609jss

Cited by 4 publications

(2 citation statements)

References 28 publications

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“…Getting insight into the energy transfer mechanism requires investigation of the PL dynamics between the two ions. Therefore, time resolved photoluminescence (TRPL) measurements The average decay lifetime of Yb ions(τ) in single and co-doped samples have been estimated using the following equation: [33][34]…”

Section: Resultsmentioning

confidence: 99%

Ultraviolet to infrared downshifting in Ce and Yb co-doped aluminum oxynitride thin films

Giba¹,

Pigeat²,

Bruyère³

et al. 2019

J. Phys. D: Appl. Phys.

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We report for the first time on ultraviolet (UV) to near infrared (NIR) downshifting (DS) between cerium, Ce, and Ytterbium, Yb, in aluminum oxynitride, Al(O)N, thin films prepared by reactive magnetron sputtering technique. The crystal structure of the prepared samples has been investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM).In addition, the content of Ce and Yb were determined by Rutherford backscattering spectrometry (RBS). The role of Ce in downshifting the absorbed excitation UV photons into NIR ones is supported by photoluminescence (PL) and photoluminescence excitation (PLE) measurements of (Ce, Yb) co-doped samples. Time-resolved PL (TRPL) along with PL power-dependent measurements propose that one-to-one photon mechanism is achieved through charge transfer state (CTS) mediation. The present findings contribute to the racetrack of downconversion (DC) solar cell topic by investigating such DC phenomenon in a new matrix, Al(O)N.

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Section: Resultsmentioning

confidence: 99%

Ultraviolet to infrared downshifting in Ce and Yb co-doped aluminum oxynitride thin films

Giba¹,

Pigeat²,

Bruyère³

et al. 2019

J. Phys. D: Appl. Phys.

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“…Then, it relaxes to the bottom of the 5d energy level before emitting a photon. Although near-infrared photons can be emitted through the ET process of CTS, [70,71] this process is not quantum cutting because the material absorbs one highenergy photon while only one low-energy photon can be released. Due to the down-conversion effect, this phosphor enhances the absorption of sunlight by solar cells in the short-wave range (Figure 7a,b).…”

Section: Ce 3þ -Yb 3þmentioning

confidence: 99%

Broadband Sensitized Near‐Infrared Quantum Cutting Materials for Silicon Solar Cells: Progress, Challenges, and Perspectives

Song,

Lou,

Diao

et al. 2024

Solar RRL

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Silicon solar cells are currently the most widely used type, accounting for more than 90% of the commercial market. However, the spectral mismatch between the solar spectrum and the absorption spectra of the cells is the main cause restricting their conversion efficiency, which can not exceed the Shockley‐Queisser limit. Quantum cutting can convert one high‐energy photon into two or more low‐energy photons and reduce the energy loss of the high‐energy photons, providing a way to improve the photoelectric conversion efficiency (PCE) of silicon solar cells. The unique electronic configuration of rare‐earth elements gives them excellent optical properties and makes them good candidates for the luminescent centers of quantum cutting materials. This paper reviews their luminescence mechanism, energy transfer (ET) mechanism, and application in silicon solar cells and outlines the potential problems of broadband‐sensitized NIR quantum cutting materials. Some key issues and future directions are also discussed.This article is protected by copyright. All rights reserved.

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Enhancing concentrator monocrystalline Si solar cells by down conversion Ce3+-Yb3+ co-doped YAG phosphors

Lou

Cao

et al. 2018

Applied Physics Letters

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Down conversion Ce3+-Yb3+ co-doped YAG phosphors are used to enhance concentrator monocrystalline silicon solar cells. The coating of polymethyl methacrylate (PMMA) mixed with the phosphors is deposited on the surface of the solar cells by spin-coating method. It is found that the solar cells with the phosphor coating always have higher conversion efficiency than the bare solar cells under different illumination intensities. This is attributed to the down conversion effect of the phosphors and the reduced reflection (especially in the wavelength range 350–550 nm). The reflection of the light emitted from the phosphor's particles at the air/PMMA interface also contributes to the improvement. The relative growth in the conversion efficiency of the solar cells with the phosphor coatings increases with the illumination intensity from 4.86% under 100 mW cm−2 to 6.04% under 400 mW cm−2 because the increase in the emission from the phosphors is faster than that of the illumination intensity when the illumination intensity increases.

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Temperature Dependent Energy Transfer in Ce³⁺-Yb³⁺Co-Doped YAG Phosphors

Cited by 4 publications

References 28 publications

Ultraviolet to infrared downshifting in Ce and Yb co-doped aluminum oxynitride thin films

Ultraviolet to infrared downshifting in Ce and Yb co-doped aluminum oxynitride thin films

Broadband Sensitized Near‐Infrared Quantum Cutting Materials for Silicon Solar Cells: Progress, Challenges, and Perspectives

Enhancing concentrator monocrystalline Si solar cells by down conversion Ce3+-Yb3+ co-doped YAG phosphors

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Temperature Dependent Energy Transfer in Ce3+-Yb3+Co-Doped YAG Phosphors

Cited by 4 publications

References 28 publications

Ultraviolet to infrared downshifting in Ce and Yb co-doped aluminum oxynitride thin films

Ultraviolet to infrared downshifting in Ce and Yb co-doped aluminum oxynitride thin films

Broadband Sensitized Near‐Infrared Quantum Cutting Materials for Silicon Solar Cells: Progress, Challenges, and Perspectives

Enhancing concentrator monocrystalline Si solar cells by down conversion Ce3+-Yb3+ co-doped YAG phosphors

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Temperature Dependent Energy Transfer in Ce³⁺-Yb³⁺Co-Doped YAG Phosphors