The synthesis and luminescent properties of morphology-controlled Gd2O3:Dy3+/Eu3+ phosphors with enhanced red emission via energy transfer

Liu, Bin; Li, Jinkai; Duan, Guangbin; Li, Qinggang; Liu, Zongming

doi:10.1016/j.jlumin.2018.10.035

Cited by 18 publications

(13 citation statements)

References 42 publications

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“…The variation of ln[( I 0 − I ) / I ] in terms of 1/ kT for the thermal quenching is shown in Figure 9 b. The slope of the fitting curve is −0.211, which corresponds to the E a value of 0.211 eV being almost the same as the 0.212 eV value for the Gd 2 O 3 :Dy 3+ /Eu 3+ system [ 39 , 40 ]. The larger activation energy means that the synthesized phosphor has a more stable thermal stability compared to other reported phosphors and can be potentially used in lighting and display areas [ 41 ].…”

Section: Resultsmentioning

confidence: 99%

Controlled Synthesis of Tb3+/Eu3+ Co-Doped Gd2O3 Phosphors with Enhanced Red Emission

Zhu

Guo

et al. 2019

Molecules

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(Gd0.93−xTb0.07Eux)2O3 (x = 0–0.10) phosphors shows great potential for applications in the lighting and display areas. (Gd0.93−xTb0.07Eux)2O3 phosphors with controlled morphology were prepared by a hydrothermal method, followed by calcination at 1100 °C. XRD, FE-SEM, PL/PLE, luminescent decay analysis and thermal stability have been performed to investigate the Eu3+ content and the effects of hydrothermal conditions on the phase variation, microstructure, luminescent properties and energy transfer. Optimum excitation wavelength at ~308 nm nanometer ascribed to the 4f8-4f75d1 transition of Tb3+, the (Gd0.93−xTb0.07Eux)2O3 phosphors display both Tb3+and Eu3+ emission with the strongest emission band at ~611 nm. For increasing Eu3+ content, the Eu3+ emission intensity increased as well while the Tb3+ emission intensity decreased owing to Tb3+→Eu3+ energy transfer. The energy transfer efficiencies were calculated and the energy transfer mechanism was discussed in detail. The lifetime for both the Eu3+ and Tb3+ emission decreases with the Eu3+ addition, the former is due to the formation of resonant energy transfer net, and the latter is because of contribution by Tb3+→Eu3+ energy transfer. The phosphor morphology can be controlled by adjusting the hydrothermal condition (reaction pH), and the morphological influence to the luminescent properties (PL/PLE, decay lifetime, etc.) has been studied in detail.

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Section: Resultsmentioning

confidence: 99%

Controlled Synthesis of Tb3+/Eu3+ Co-Doped Gd2O3 Phosphors with Enhanced Red Emission

Zhu

Guo

et al. 2019

Molecules

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“…The difference in photoluminescence intensity can be interpreted from surface area, and particle size aspects of phosphor, as PL intensity is highly affected by these parameters. [38][39][40][41] It is well established fact that the surface area of nanoparticles increases with a decrease in crystallite size. In general, larger the surface area, higher will be the defects into the crystal of a phosphor.…”

Section: Photoluminescencementioning

confidence: 99%

Studies on Morphology and Photoluminescent Properties of Tb3+ Doped YbPO4 Nanostructures Synthesized by Different Synthetic Methods

Khajuria¹,

Kumar²,

Tashi³

et al. 2020

ACSi

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The morphology dependent optical properties of Tb 3+ in YbPO 4 host lattice have been investigated. 10 % Terbium doped ytterbium phosphate (YbPO 4 :Tb 3+) nanostructures (NSs) were synthesized by five different synthetic methods i.e. sonochemical method, hydrothermal method, solvothermal method, sacrificial template method and coprecipitation method. Structural facets and optical properties of fabricated nanoparticles were studied in detail by powder X-ray diffraction (PXRD), Fourier transform infrared spectrum (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectra (EDS), and photoluminescence (PL) techniques. We have investigated the impact of synthetic procedures employed on the morphology and uniformity of synthesized NSs and consequently on the optical properties of the NSs. The intense green emission from the nanophosphor shows that phosphor can be used in IR-sensors, LEDs and as solar spectrum converters.

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“…The Gd2O3 which possesses low phonon energy (~600 cm -1 ) is considered a good host material for various lanthanides such as Dy 3+ , Tb 3+ , Eu 3+ , Sm 3+ so on. Generally, it exists in various structural forms viz., sesquioxides exhibiting hexagonal, monocilinic, and cubic structures [24][25][26]. Gd2O3 in cubic form possess two non-equivalent sites of cation namely, C2 (noncentrosymmetric) and S6 (centrosymmetric) [25,26] are occurred.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of rod shaped red emitting Gd 2 O 3 :Eu 3+ phosphor

Wangkhem

Singh

2023

Preprint

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Simple hydrothermal method can be applied for synthesizing rod shape Gd2O3:Eu3+ phosphors. X-ray diffraction, Fourier transform infrared spectroscopy and transmission electron microscopy are used for the characterizations of samples. Increase of Eu3+ concentration in Gd2O3:Eu3+ can cause red shift in the charge transfer band (CTB) of Eu – O. The nature of Eu3+ surroundings is asymmetric. It is ascertained from PL emission studies. The calculation of second order crystal field parameter from PL spectra corroborates the asymmetric environment of Eu3+. PL emission and decay lifetime studies confirm the existence of quenching due cross-relaxation. The quantum yield for Y2O3:Eu3+ (19 at.%) under 265 nm excitation is found to be 7%.

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The synthesis and luminescent properties of morphology-controlled Gd2O3:Dy3+/Eu3+ phosphors with enhanced red emission via energy transfer

Cited by 18 publications

References 42 publications

Controlled Synthesis of Tb3+/Eu3+ Co-Doped Gd2O3 Phosphors with Enhanced Red Emission

Controlled Synthesis of Tb3+/Eu3+ Co-Doped Gd2O3 Phosphors with Enhanced Red Emission

Studies on Morphology and Photoluminescent Properties of Tb3+ Doped YbPO4 Nanostructures Synthesized by Different Synthetic Methods

Hydrothermal synthesis of rod shaped red emitting Gd 2 O 3 :Eu 3+ phosphor

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