Photoluminescence of Ce3+, Tb3+, and Mn2+in Glasses of Base Composition LaMgB5O10

Jouhari, N. El; Parent, C.; Flem, G. Le

doi:10.1006/jssc.1996.0195

Cited by 40 publications

(21 citation statements)

References 5 publications

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“…Such a broad, blue emission for Ce 3+ ions has been observed and attributed to a charge transfer. [4,15] The charge transfer between Ce 4+ electron donation centers and Ce 3+ luminescence centers in the present nanotubes may occur due to the electron-photon interaction. It has been reported that the 4f-5d bands of Ce 3+ and the charge-transfer transition bands of Ce 4+ ions appear in the same wavelength range and overlap.…”

Section: Methodsmentioning

confidence: 99%

Cerium Phosphate Nanotubes: Synthesis, Valence State, and Optical Properties

et al. 2005

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Metal phosphates are widely utilized in nonlinear optical materials, phosphors, sensors, heat-resistant, and biocompatible materials. A particular emphasis has been placed on the study of rare-earth or rare-earth-doped phosphate materials for applications in photonic devices. [1] This interest is primarily attributed to the position of the 4f electrons, which are well shielded from the effects of the neighboring ions. Such shielding leads to discrete and well-defined energy level schemes, as well as to rather weak coupling between the electronic and vibrational wave functions. The specific luminescence with a characteristic long lifetime originates from the f-f emissions. However, at present, the progress with regard to new luminescent materials is chiefly focussed on short emission wavelengths, which are useful for imaging, lithography, and optical data recording.[2] The rare-earth ions Ce 3+ and Sm 2+ exhibit a 5d-4f emission with a larger absorption in the UV region and a shorter luminescence lifetime due to allowed electric dipole transitions; thus, they display excellent properties for applications in these fields. [3] On the other hand, although the doping of transparent Ce 4+ ions in luminescence materials has been prohibited due to the competitive absorption in UV region, some Ce 3+ /Ce 4+ hybrid systems in glass hosts exhibit a strong blue emission, which possibly results from electron transfer from a donor level to the neighboring Ce 4+ ions, consequently forming excited states of Ce 3+ ions. [4] Taking into account the strong UV absorption of Ce 4+ ions, such hybrid structures are good candidates for materials that display blue emission with high absorption and fast emissive rates. [5] One-dimensional nanomaterials, that is, nanotubes made of, for example, C, BN, WS 2 , VO x , TiO 2 , and InP [6] have been synthesized and display novel properties that are frequently different from those of the bulk forms. However, the synthesis and emission behaviour of nanotube-like hybrid materials containing Ce 4+ /Ce 3+ ions has received much less attention. Herein, we report on a reproducible and controllable route for the production of cerium phosphate nanotubes, the first rare-earth phosphate nanotubes. Tetravalent cerium phosphate (CeP, Ce(HPO 4 ) 2 ·n H 2 O) nanotubes were first synthesized after improving the traditional synthetic route toward a CeP fiber.[7] Subsequent annealing of the assynthesized nanotubes led to a mixture of valence states, and the desired Ce 3+ /Ce 4+ hybrid phosphate nanotubes were obtained for the first time. The nanotubes display novel optical properties; that is, the Ce 4+ ions effectively absorb the UV light, whereas the Ce 3+ ions exhibit strong emission in the blue region of a photoluminescence spectrum.It has been reported that a high PO 4 /Ce ratio (20:1-120:1) in the initial solution and a high reaction temperature (up to 95 8C) are needed to form a CeP fiber. [7,8] In this study, we have increased the PO 4 /Ce ratio to 300:1 and increased the reaction temperature to above ...

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Section: Methodsmentioning

confidence: 99%

Cerium Phosphate Nanotubes: Synthesis, Valence State, and Optical Properties

et al. 2005

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“…This is very important for lighting applications where the chromaticity coordinate's characterization in the C.I.E. chromaticity diagram is indispensable [8].…”

Section: Photoluminescence Spectramentioning

confidence: 99%

Luminescent properties of Dy3+-doped and Dy3+–Tm3+co-doped phosphate glasses

Liang

Zhu

Yang

et al. 2008

Journal of Luminescence

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“…This is very important for lighting applications because the desired emission characteristics need to match with those of the International Commission on Illumination ͑CIE͒ chromaticity diagram. 14 In summary, silicate and borosilicate glasses codoped with Tb 3+ and Sm 3+ ions were synthesized by the meltquenching method. All luminescence glasses can be effectively excited by UV light.…”

Section: Fang Xiamentioning

confidence: 99%

Luminescence properties of Tb3+–Sm3+ codoped glasses for white light emitting diodes

Liang

Yang

Zhu

et al. 2007

Applied Physics Letters

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Photoluminescence properties of silicate and borosilicate glasses codoped with Tb3+ and Sm3+ ions have been characterized by excitation and emission spectroscopies. When excited by ultraviolet light the glasses emit a combination of green and orange-red wavelengths giving white light. The ratio of the intensities of orange-red to green emissions can be tuned by varying both the concentration of the Sm3+ ion and an the composition of the glass matrix. The excitation and emission spectra show a self-quenching effect for the Sm3+ ions and an energy transfer from Tb3+ (D45) to Sm3+ (G5∕24).

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Photoluminescence of Ce3+, Tb3+, and Mn2+in Glasses of Base Composition LaMgB5O10

Cited by 40 publications

References 5 publications

Cerium Phosphate Nanotubes: Synthesis, Valence State, and Optical Properties

Cerium Phosphate Nanotubes: Synthesis, Valence State, and Optical Properties

Luminescent properties of Dy3+-doped and Dy3+–Tm3+co-doped phosphate glasses

Luminescence properties of Tb3+–Sm3+ codoped glasses for white light emitting diodes

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