Morphology-controllable synthesis, electronic structure and multicolor-tunable luminescence properties of multifunctional ScPO4 based nano/micro-phosphor

Han, Lili; Guo, Chao; Ci, Zhipeng; Wang, Chengwei; Wang, Yuhua; Huang, Yan

doi:10.1016/j.cej.2016.11.136

Cited by 15 publications

(3 citation statements)

References 49 publications

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“…A broad band peaking at 240-250 nm belongs to an intrinsic emission previously observed in ScPO4 and attributed to the radiative annihilation of self-trapped excitons (STEs), whereas the electron and hole components of STEs are supposed to be localized on Sc ions and PO4 complexes, respectively [26]. The participation of Sc in the formation of STEs is further confirmed by the band structure calculations, which demonstrate that the bottom of the conduction band of ScPO4 is formed by the 3d Sc states [27,28] and by the absence of the corresponding emission band in YPO4:Eu 3+ (see discussion below). The other broad band peaking around 340-370 nm is ascribed to the emission from crystal structure defects, probably from oxygen deficient oxyanionic complexes.…”

Section: Resultssupporting

confidence: 55%

Enhancement of Light Output in ScxY1−xPO4:Eu3+ Solid Solutions

Spassky

Voznyak-Levushkina

et al. 2020

Symmetry

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The luminescence properties of ScxY1−xPO4:Eu3+ solid solutions have been studied under excitation by synchrotron radiation in the energy range of 4.5–50 eV. The luminescence originating from three different types of emission centers was observed, and the origin of the emission centers was determined. The light output of ScxY1−xPO4:Eu3+ was shown to depend non-linearly on the ratio of Sc and Y cations, whereas it is maximal in compounds with their equal content. The branching of the energy relaxation process between different emission centers is analyzed for the brightest Sc0.5Y0.5PO4:Eu3+ solid solution.

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Section: Resultssupporting

confidence: 55%

Enhancement of Light Output in ScxY1−xPO4:Eu3+ Solid Solutions

Spassky

Voznyak-Levushkina

et al. 2020

Symmetry

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“…The contribution of Sc states to the formation of the conduction band bottom was predicted by band structure calculations [ 45 , 46 ]. Their contribution into the band structure of Y 1− x Sc x PO 4 in the vicinity of the bandgap can be also deduced from the excitation spectra presented in Figure 4 .…”

Section: Resultsmentioning

confidence: 99%

Bright UV-C Phosphors with Excellent Thermal Stability—Y1−xScxPO4 Solid Solutions

et al. 2022

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The structural and luminescence properties of undoped Y1−xScxPO4 solid solutions have been studied. An intense thermally stable emission with fast decay (τ1/e ~ 10−7 s) and a band position varying from 5.21 to 5.94 eV depending on the Sc/Y ratio is detected and ascribed to the 2p O-3d Sc self-trapped excitons. The quantum yield of the UV-C emission, also depending on the Sc/Y ratio, reaches 34% for the solid solution with x = 0.5 at 300 K. It is shown by a combined analysis of theoretical and experimental data that the formation of Sc clusters occurs in the solid solutions studied. The clusters facilitate the creation of energy wells at the conduction band bottom, which enables deep localization of electronic excitations and the creation of luminescence centers characterized by high quantum yield and thermal stability of the UV-C emission.

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“…It is an antistokes emission; that is, absorbing two or more long-wavelength photons causes a short-wavelength emission . So far, sever RE 3+ ions have been developed as activators for UC luminescence, e.g., Er 3+ , Ho 3+ , Tm 3+ , and Tb 3+ . − Besides, the Yb 3+ is usually codoped to enhance their luminescence, because the Yb 3+ has a large near-infrared (NIR) absorption section at 980 nm …”

Section: Introductionmentioning

confidence: 99%

Structure, Morphology and Upconversion Luminescence of Rare Earth Ions Doped LiY₉(SiO₄)₆O₂ for Temperature Sensing

Zhang

Jin

2019

Ind. Eng. Chem. Res.

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To develop novel upconversion (UC) luminescence materials for optical temperature sensing applications, the rare earth (Yb3+, Er3+, Ho3+, and Tm3+) ions doped LiY9(SiO4)6O2 phosphors were developed. The single-phase samples were confirmed by XRD patterns. The morphology characteristics were studied via SEM and TEM techniques. When excited by 980 nm, the optimal doping concentrations for Er3+/Ho3+/Tm3+ were determined in the UC emission spectra and their characteristic emission peaks were attributed. The temperature-dependence of the UC spectra was investigated by using different strategies. The maximum absolute sensitivities were calculated to be 4.77 × 10–3 K–1 for I522/I548 (Er3+), 0.034 K–1 for I661/I522 (Er3+), 0.034 K–1 for I660/I548 (Ho3+), and 2.74 × 10–4 K–1 for I695/I789 (Tm3+), which show high sensitivity values. Among these activator ions, the Tm3+ activated sample demonstrates the largest relative sensitivity. Compared with some previous lanthanide ions activated temperature-sensing luminescence materials, the present phosphors exhibit improved sensitivities and could show potential applications for temperature sensors.

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Morphology-controllable synthesis, electronic structure and multicolor-tunable luminescence properties of multifunctional ScPO4 based nano/micro-phosphor

Cited by 15 publications

References 49 publications

Enhancement of Light Output in ScxY1−xPO4:Eu3+ Solid Solutions

Enhancement of Light Output in ScxY1−xPO4:Eu3+ Solid Solutions

Bright UV-C Phosphors with Excellent Thermal Stability—Y1−xScxPO4 Solid Solutions

Structure, Morphology and Upconversion Luminescence of Rare Earth Ions Doped LiY₉(SiO₄)₆O₂ for Temperature Sensing

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Morphology-controllable synthesis, electronic structure and multicolor-tunable luminescence properties of multifunctional ScPO4 based nano/micro-phosphor

Cited by 15 publications

References 49 publications

Enhancement of Light Output in ScxY1−xPO4:Eu3+ Solid Solutions

Enhancement of Light Output in ScxY1−xPO4:Eu3+ Solid Solutions

Bright UV-C Phosphors with Excellent Thermal Stability—Y1−xScxPO4 Solid Solutions

Structure, Morphology and Upconversion Luminescence of Rare Earth Ions Doped LiY9(SiO4)6O2 for Temperature Sensing

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Structure, Morphology and Upconversion Luminescence of Rare Earth Ions Doped LiY₉(SiO₄)₆O₂ for Temperature Sensing