Energy transfer in europium doped yttrium vanadate crystals

Hsu, Chang Samuel; Powell, Richard C.

doi:10.1016/0022-2313(75)90051-4

Cited by 241 publications

(110 citation statements)

References 27 publications

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“…The weak absorption peak at 450 cm −1 could be attributed to YO absorption. The FTIR spectra of YVO 4 phosphor powder synthesized at other HRTs are basically similar to This causes a splitting of some of the degenerate energy levels [23].…”

Section: Introductionmentioning

confidence: 65%

Hydrothermal Synthesis and Microstructural, Optical Properties Characterization of YVO₄Phosphor Powder

et al. 2014

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The phonon energy of YVO4 crystal is lower than other usual compounds of salt. So it is suitable as host material for down-conversion materials. Hydrothermal method was adopted to synthesize YVO4 phosphor powder with the use of yttrium oxide and sodium vanadate as raw material. The change in the relative integral intensity of the (200) and (112) diraction peaks indicates that macroscopic stress in the lattice obviously changes with the elevated hydrothermal reaction temperature. The YVO4 phosphor powder synthesized involves a certain agglomeration of small particles. The phonon vibration in the YVO4 originates mainly from the internal vibrations in the vanadiumoxygen tetrahedron, in addition to the YO and OH vibrations. Due to a low phonon energy of only 2.8188 × 10 −21 J, YVO4 helps to improve the down-conversion eciency of rare-earth ions. A bandgap value of approximately 3.8 eV for the synthesized YVO4 powders leads to good absorption properties in the ultraviolet region. Upon excitation by the 320 nm ultraviolet photon, the intrinsic emission of YVO4 powders is annihilated, and a broadband emission of VO 3− 4near 450 nm is observed at room temperature. The YVO4 phosphor powder synthesized at 180• C exhibits the maximum photoluminescence intensity because of its excellent crystallization.

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Section: Introductionmentioning

confidence: 65%

Hydrothermal Synthesis and Microstructural, Optical Properties Characterization of YVO₄Phosphor Powder

et al. 2014

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“…On the other hand, the blue emission lies close to the luminescence features typical of undoped YVO 4 , and has an excitation band at 320 nm, i.e. coincident with the absorption of the vanadate ion in YVO 4 [11,12]. However, the decay time (27 ns in Ho 3+ :YVO 4 ) is much shorter than the decay time of the blue emission (13-14 µs) observed in undoped YVO 4 [11,12].…”

Section: -mentioning

confidence: 72%

“…coincident with the absorption of the vanadate ion in YVO 4 [11,12]. However, the decay time (27 ns in Ho 3+ :YVO 4 ) is much shorter than the decay time of the blue emission (13-14 µs) observed in undoped YVO 4 [11,12]. The shortening is understood by non-radiative energy transfer from the vanadate ion to defects in the doped crystals.…”

Section: -mentioning

confidence: 77%

Photoluminescence of Ho³⁺:YVO₄ crystals

Poloşan

Bettinelli

Tsuboi

2007

Phys. Status Solidi (c)

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Emission spectra of Ho 3+ -doped YVO 4 crystals are studied in the visible and infrared spectral regions. Besides the emission bands at 544 nm and at about 1950 and 2017 nm due to Ho 3+ , we observed a broad emission band at 610 nm at low temperatures like 15 K in the highly doped crystals with the Ho 3+ concentrations of more than 0.5 mol %. The excitation band for this broad emission is located at 390 nm which is near the edge of band gap of the crystal. It is suggested that the 610 nm band is attributed to defects related to oxygen vacancies around V 4+ ions. 3+ find practical applications due to their long lived luminescence and good optical coherence properties which can possibly make them useful for optical data storage and processing, for quantum information and computing [4] and as frequency standards. A special attention was paid in the case of Ho 3+ :YVO 4 crystals to the very long lifetime fluorescence of the 2017 nm emission, which is around 3 ms [5], so that this material can be used as a very efficient and high-energy laser device like in the case of Ho 3+ :YAG crystals [6]. A very interesting application of Ho 3+ :YVO 4 could be in the field of quantum information processing due to the relatively long coherence time of some optical transitions [7].Although a considerable amount of study has been made for Ho 3+ :YVO 4 crystals, several aspects of the optical spectroscopy are still to be investigated, especially concerning the near-infrared emission, and the properties of the defects present in the crystals grown using high temperature techniques. For these reasons, we found it interesting to expand the previous spectroscopic investigations of this important luminescent crystal.

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“…As a consequence the luminescent centre relaxes considerably after excitation. As a consequence the energy migration between Bi 3+ ions mutually has a large thermal activation energy [13,14]. Since the Bi3~excitation energy is not transferred to rare earth ions in the lattice, we conclude that even at room temperature the relaxation cannot be counteracted by thermal activation and that the excitation energy does not migrate through the host lattice.…”

Section: Pmentioning

confidence: 84%

On the luminescence of bismuth aluminate (Bi2Al4O9)

Blasse

1980

Journal of Luminescence

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Energy transfer in europium doped yttrium vanadate crystals

Cited by 241 publications

References 27 publications

Hydrothermal Synthesis and Microstructural, Optical Properties Characterization of YVO₄Phosphor Powder

Hydrothermal Synthesis and Microstructural, Optical Properties Characterization of YVO₄Phosphor Powder

Photoluminescence of Ho³⁺:YVO₄ crystals

On the luminescence of bismuth aluminate (Bi2Al4O9)

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Energy transfer in europium doped yttrium vanadate crystals

Cited by 241 publications

References 27 publications

Hydrothermal Synthesis and Microstructural, Optical Properties Characterization of YVO4Phosphor Powder

Hydrothermal Synthesis and Microstructural, Optical Properties Characterization of YVO4Phosphor Powder

Photoluminescence of Ho3+:YVO4 crystals

On the luminescence of bismuth aluminate (Bi2Al4O9)

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Product

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Hydrothermal Synthesis and Microstructural, Optical Properties Characterization of YVO₄Phosphor Powder

Hydrothermal Synthesis and Microstructural, Optical Properties Characterization of YVO₄Phosphor Powder

Photoluminescence of Ho³⁺:YVO₄ crystals