Synthesis and luminescent properties of SnO2:Eu nanopowder via polyacrylamide gel method

Fu, Xin; Zhang, Hongwu; Niu, Shuyun; Xin, Qin

doi:10.1016/j.jssc.2004.11.003

Cited by 65 publications

(34 citation statements)

References 16 publications

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“…While a number of papers concerning the photoluminescence (PL) of SnO 2 :Eu have been published [7][8][9][10], consideration of the application potential of the material and possible reasons limiting its luminescence performance is still missing. Hereby, we have carried out a systematic investigation of sol-gel-prepared SnO 2 :Eu while also studying the influence of antimony co-dopant, which is one of the main impurities used for improving the electrical conductivity of stannia [1].…”

Section: Introductionmentioning

confidence: 99%

Structural and luminescence characteristics of SnO2:Eu and SnO2:Eu,Sb nanophosphors upon annealing at high temperatures

Kiisk

Kangur

Paalo

et al. 2011

Materials Chemistry and Physics

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The paper explores the structure and luminescence of sol-gel-derived SnO 2 :Eu and SnO 2 :Eu,Sb nanopowders which may be useful as electrically conductive phosphors. The samples were sintered in air at temperatures reaching up to 1400°C. Raman-, SEM-, EDX-and photoluminescence characterization of the samples was carried out.High-temperature annealing of SnO 2 :Eu leads to a nanoparticulate phosphor with considerable efficiency of host-sensitized Eu 3+ emission under UV excitation although the emission is slightly quenched at room temperature. While Sb co-dopant immensely improves crystallization at 1400°C, it also impairs luminescence performance. SEM and EDX characterization suggest pronounced segregation of Eu induced by the enhanced crystal growth. Interestingly, Sb-doping seems to activate in the Raman spectrum quite a few SnO 2 vibrations which are normally rather weak or IR active.

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Section: Introductionmentioning

confidence: 99%

Structural and luminescence characteristics of SnO2:Eu and SnO2:Eu,Sb nanophosphors upon annealing at high temperatures

Kiisk

Kangur

Paalo

et al. 2011

Materials Chemistry and Physics

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“…the symmetry of the emission center). No marked temporal stretching of the emission due to hindered energy transfer from host to guest is evident in the case of this host and therefore, the charge transfer excitation may also contribute [5]. Moreover, the decay time of the long component does not appreciably depend on annealing treatment suggesting that the quenching of Eu 3+ emission does not take place evenly across the bulk of the crystal but is limited to only certain emission centres (e.g.…”

Section: Contributed Articlementioning

confidence: 90%

“…Yet, the reported luminescence properties and their interpretation are often quite ambiguous [3][4][5], which may be related to variable crystallinity and the presence of various lattice defects (non-stoichiometry) induced by the particular preparation routes and thermal treatments employed. For example, it is unclear how important is the role of nonstoichiometry (i.e.…”

mentioning

confidence: 99%

Optical characterization of sol‐gel‐derived SnO₂:Eu nanopowders annealed at high temperatures

Kiisk

Kangur

Paalo

et al. 2011

Phys. Status Solidi C

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Nanoparticulate SnO2 powders doped with europium (0.5 at%) were prepared by using sol‐gel method. The samples were sintered in air or argon at temperatures ranging from 600 to 1400 °C. Raman‐, SEM‐ and photoluminescence characterization of the samples was carried out. The heat‐treated samples exposed mainly broad emission bands typical of Eu3+ ions in disordered surrounding when excited at 464 nm (direct excitation of Eu3+) whereas spectrally well‐resolved emission characteristic of Eu3+ in crystalline phase was obtained when excited at 266 nm (attributed to host‐sensitization). The broad emission bands quite abruptly disappeared after annealing at 1400 °C. Inert gas (argon) atmosphere was found to improve the emission intensity compared to similar heat treatment in air. It is argued that the observed luminescence behaviour might be explained by the combined effect of the OH groups and the peculiarities of coarsening of the nanopowder induced by heat treatment. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…The existing researches showed that SnO 2 material is the semiconductor belonging to direct band-to-band transition, and the band gap energy of bulk SnO 2 is about 3.6 eV [23,26,29] . In recent years, pure SnO 2 nanoparticles [30] , SnO 2 nanobelt [23] and SnO 2 nanowire [23] have been prepared, with the band gap energies increasing.…”

Section: Optical Absorptionmentioning

confidence: 99%

“…The synthesis and emission characteristics of Eu doped SnO 2 nanostructure were investigated by some groups. For instance, Fu et al [26] adopted polyacrylamide gel method to prepare nanosized Eu doped SnO 2 crystals and argued that oxygen vacancies could change the symmetry and vibrational modes at the luminescent Eu centers. Zeferino et al [27] reported the photoluminescent(PL) properties of SnO 2 :Eu nanoparticles grown hydrothermally and found that the incorporation of Eu 3+ ions with higher concentrations could probably cause the formation of Eu 3+ /Eu 0 clusters at the interstitial sites and on the surfaces of the nanoparticles, quenching the PL emission because of the enhanced recombination of photo generated charge carriers.…”

Section: Introductionmentioning

confidence: 99%

Electrospinning synthesis and photoluminescence properties of SnO2:xEu3+ nanofibers

Shen

et al. 2014

Chem. Res. Chin. Univ.

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SnO 2 :xEu 3+ (x=0, 1%, 3%, 5%, molar fraction) fibers were synthesized by electrospinning technology. The size of the as-prepared fibers is relatively uniform and the average diameter is about 200 nm with a large draw ratio. The as-prepared Eu 3+ doped SnO 2 nanofibers have a rutile structure and consist of crystallite grains with an average size of about 10 nm. A slight red shift of the A 1g and B 2g vibration modes and an additional peak at 288 nm were observed in the Raman spectra of the nanofibers. The energies of bandgaps of the SnO 2 nanofiber with Eu doping of 1% and 3% are 2.64 eV, and the energy of bandgap is 2.94 eV with Eu doping of 5%(molar fraction). There is only orange emission( 5 D 0 → 7 F 1 magnetic dipole transition) for Eu doped SnO 2 nanofibers, and no red emission could be observed. The orange emission upon indirect excitation splits into three peaks and the peak intensity at the excitation wavelength of 275 nm is higher than that at the excitation wavelength of 488 nm.

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Synthesis and luminescent properties of SnO2:Eu nanopowder via polyacrylamide gel method

Cited by 65 publications

References 16 publications

Structural and luminescence characteristics of SnO2:Eu and SnO2:Eu,Sb nanophosphors upon annealing at high temperatures

Structural and luminescence characteristics of SnO2:Eu and SnO2:Eu,Sb nanophosphors upon annealing at high temperatures

Optical characterization of sol‐gel‐derived SnO₂:Eu nanopowders annealed at high temperatures

Electrospinning synthesis and photoluminescence properties of SnO2:xEu3+ nanofibers

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Synthesis and luminescent properties of SnO2:Eu nanopowder via polyacrylamide gel method

Cited by 65 publications

References 16 publications

Structural and luminescence characteristics of SnO2:Eu and SnO2:Eu,Sb nanophosphors upon annealing at high temperatures

Structural and luminescence characteristics of SnO2:Eu and SnO2:Eu,Sb nanophosphors upon annealing at high temperatures

Optical characterization of sol‐gel‐derived SnO2:Eu nanopowders annealed at high temperatures

Electrospinning synthesis and photoluminescence properties of SnO2:xEu3+ nanofibers

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Optical characterization of sol‐gel‐derived SnO₂:Eu nanopowders annealed at high temperatures