Influence of Mn2+ ions on the structure, spectral characteristics and optical thermometry performances of ZnAl2O4:Cr3+ multifunctional phosphors

Zhu, Bingjun; Ren, Shiqi; Liu, Yunlong; Dong, Zhengchao; Wang, Qingru; Li, Shuhong; Yang, Bing; Wang, Wenjun; Zhang, Bingyuan

doi:10.1016/j.jlumin.2022.118736

Cited by 9 publications

(4 citation statements)

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“…Table 2 summarizes the S R of some recently studied RE 3+ /TM 4+ doped phosphors. 20,23,29,46–55 It is worth noting that the obtained relative sensitivity could be promised for luminescence thermometry.…”

Section: Resultsmentioning

confidence: 96%

Designing dual-emission phosphors for temperature warning indication and dual-mode luminescence thermometry

Li,

et al. 2023

Dalton Trans.

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Section: Resultsmentioning

confidence: 96%

Designing dual-emission phosphors for temperature warning indication and dual-mode luminescence thermometry

Li,

et al. 2023

Dalton Trans.

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“…Herein, heterovalent substitution contributing to the broadening of the emission of LTT:Cr 3+ phosphors is proposed. Spectroscopic properties involved in the broadening linewidth or shift of emission spectra with the increase of temperature and non-radiative decay closely correlate to electron-phonon coupling (EPC) . With linewidth broadening, the electron-phonon coupling gets stronger.…”

Section: Resultsmentioning

confidence: 99%

“…Spectroscopic properties involved in the broadening linewidth or shift of emission spectra with the increase of temperature and non-radiative decay closely correlate to electron-phonon coupling (EPC). 34 With linewidth broadening, the electron-phonon coupling gets stronger. To reveal the nature of the heterovalent substitution strategy leading to ultra-broadband emission, the EPC strength evaluated by the Huang−Rhys factor (S) is investigated.…”

Section: Ultra-broadband Emission Analysismentioning

confidence: 99%

Ultra-Broadband Near-Infrared Phosphors Realized by the Heterovalent Substitution Strategy

Yang

Fan

et al. 2023

Inorg. Chem.

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Near-infrared (NIR) phosphor-converted light-emitting diodes with broadband emission have received considerable interest. However, there remains a challenge in the construction of ultra-broadband NIR phosphors, hindering their further application. In this work, a heterovalent substitution strategy is proposed to construct a novel ultra-broadband NIR-emitting LaTiTaO 6 :Cr 3+ phosphor with a full width at half maximum of ∼300 nm. Crystal structure, time-resolved emission spectroscopy, and electron paramagnetic resonance analyses confirm that only one crystallographic site of Cr 3+ with separated ions exists. Electron and phonon coupling (EPC) evaluated by the Huang−Rhys factor (S) reveals that the heterovalent substitution strategy contributes to strong EPC with S = 9.185, resulting in ultra-broadband emission. Interestingly, a remarkable blue shift of emission from 1050 to 922 nm with increasing temperature is observed. Moreover, the application of LaTiTaO 6 :Cr 3+ phosphor is demonstrated in the qualitative analysis of ethanol/water mixtures. The work will enrich the toolbox for designing broadband NIRemitting materials.

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“…Thus, the nephelauxetic effect is getting enhanced, which eventually leads to the redshift phenomenon of both excitation and emission spectra. It is known that spectral properties including the broadening peak width and red-shift of emission spectra are closely related to electron–phonon coupling. , A stronger electron–phonon coupling leads to peak-width broadening and emission red-shift, but the probability of thermal quenching and nonradiative decay would also increase. As a result, it is a trade-off among the red-shift of the emission wavelength, broadened peak width, and worsened emission thermal stability.…”

Section: Resultsmentioning

confidence: 99%

Achieving Ultra-Wideband NIR-II Emission in Cr³⁺-Doped Li(Sc,In)(Si,Ge)O₄ Phosphors Based on Host Composition Engineering

Zhang,

Huang,

Fan

et al. 2023

Inorg. Chem.

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Realizing ultra-wideband and tunable near-infrared (NIR) emission remains a great challenge in NIR phosphor development. The luminescence of most reported NIR phosphors exhibits a peak wavelength shorter than 1000 nm and the corresponding FWHM is <200 nm. Here, a series of Cr 3+ -activated Li(Sc,In)(Si,Ge)O 4 phosphors with ultrawideband and tunable NIR-II emission are successfully developed based on the host composition engineering strategy. Significant spectral engineering in the NIR-II region is achieved with a peak wavelength changing from 1110 to 1253 nm. The olivine host structure could provide Cr 3+ activator a highly distorted octahedral site with very weak crystal field strength, which results in NIR-II ultra-wideband emission with FWHM > 300 nm. A detailed discussion on the relationship between structural variation, crystal field splitting, and NIR luminescence has been applied. As far as we know, it is the first report about Cr 3+ NIR luminescence engineering in such a long wavelength and wide range. The application of these NIR-II phosphors is demonstrated in intensity-based luminescent thermometry with a relative sensitivity of >2.0% K −1 in the physiological temperature range.

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Influence of Mn2+ ions on the structure, spectral characteristics and optical thermometry performances of ZnAl2O4:Cr3+ multifunctional phosphors

Cited by 9 publications

References 50 publications

Designing dual-emission phosphors for temperature warning indication and dual-mode luminescence thermometry

Designing dual-emission phosphors for temperature warning indication and dual-mode luminescence thermometry

Ultra-Broadband Near-Infrared Phosphors Realized by the Heterovalent Substitution Strategy

Achieving Ultra-Wideband NIR-II Emission in Cr³⁺-Doped Li(Sc,In)(Si,Ge)O₄ Phosphors Based on Host Composition Engineering

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Influence of Mn2+ ions on the structure, spectral characteristics and optical thermometry performances of ZnAl2O4:Cr3+ multifunctional phosphors

Cited by 9 publications

References 50 publications

Designing dual-emission phosphors for temperature warning indication and dual-mode luminescence thermometry

Designing dual-emission phosphors for temperature warning indication and dual-mode luminescence thermometry

Ultra-Broadband Near-Infrared Phosphors Realized by the Heterovalent Substitution Strategy

Achieving Ultra-Wideband NIR-II Emission in Cr3+-Doped Li(Sc,In)(Si,Ge)O4 Phosphors Based on Host Composition Engineering

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Achieving Ultra-Wideband NIR-II Emission in Cr³⁺-Doped Li(Sc,In)(Si,Ge)O₄ Phosphors Based on Host Composition Engineering