Photoluminescence in GdVO 4 :Bi 3+ , Eu 3+ red phosphor

Mahalley, B.N.; Dhoble, S.J.; Pode, Ramchandra; Alexander, G.

doi:10.1007/s003390050008

Cited by 95 publications

(48 citation statements)

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“…The observed signals are ascribed to Bi 3+ (6s 2 )?M n+ (d 0 ) MMCT (M n+ = Nb 5+ and Mo 6+ , respectively). Similar attributions of low-lying excitation signals to Bi-MMCT have been made in previous reports for the vanadates LnVO 4 :Bi 3+ (Ln = Y, Gd, La): [16][17][18][19] and the niobates LnNbO 4 :Bi 3+ (Ln = Y, Gd, La) [20][21][22].…”

Section: Resultssupporting

confidence: 64%

“…They are indicated with an asterisk. For Bi 3+ doping, the concerned hosts were CaZrO 3 [28], YVO 4 [18], GdVO 4 [16], LaVO 4 [19], YNbO 4 [21], GdNbO 4 [22], LaNbO 4 [20], La 2 Zr 2 O 7 [29], YTaO 4 [30] and (Gd, Bi)Ta 7 O 19 [12] and for Pb 2+ doping, the hosts were SrTiO 3 [26] and CaMoO 4 [24]. For all (except La 2 Zr 2 O 7 ), the energy position of the lowest-lying excitation bands (or shoulders) was indicated as a full square in the diagrams.…”

Section: Resultsmentioning

confidence: 99%

“…Correspondingly, a Bi-related signal appears in the near UV range in the excitation spectra. The energy position of the maximum of this Bi-related band has been determined in AVO 4 :Bi 3+ ;RE 3+ (A = La, Gd, Y;RE = Eu, Dy, Er, Sm) [16,19,[31][32][33] [37] and CaTiO 3 :Bi 3+ ;Pr 3+ [38,39]. For all, it was found that these energy positions obeyed to Eq.…”

Section: Hfementioning

confidence: 93%

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Predicting metal-to-metal charge transfer in closed-shell transition metal oxides doped with Bi3+ or Pb2+

Boutinaud

Cavalli

2011

Chemical Physics Letters

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Section: Resultssupporting

confidence: 64%

Section: Resultsmentioning

confidence: 99%

Section: Hfementioning

confidence: 93%

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Predicting metal-to-metal charge transfer in closed-shell transition metal oxides doped with Bi3+ or Pb2+

Boutinaud

Cavalli

2011

Chemical Physics Letters

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“…The prominent excitation band at 243 nm may be due to the Eu 3+ -O 2− charge transfer (CT) and the other smaller peaks as can be seen in the inset of Fig. 5 at 238, 263, 283 and 309 nm can be assigned to the 4f-4f transitions [19] of Eu 3+ . The PL emission spectrum ( exc = 243 nm) consists of the major peak at 616 nm that can be ascribed to the 5 D 0 → 7 F 2 transition of Eu 3+ and other peaks at 590, 653, 680 and 705 nm to the 5 D 0 → 7 F 1 , 5 D 0 → 7 F 3 and 5 D 0 → 7 F 4 transitions of Eu 3+ , respectively.…”

Section: Structural Compositional and Morphostructural Characterizatmentioning

confidence: 96%

Dependence of Eu3+ luminescence dynamics on the structure of the combustion synthesized Sr5(PO4)3F host

Nagpure

Dhoble

Mohapatra

et al. 2011

Journal of Alloys and Compounds

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“…3,4 Commercial micron-sized MVO 4 :Eu phosphors are generally prepared by high-temperature solid-state reactions. However, these micron-sized phosphors cannot be used in flexible and transparent displays due to their high scattering.…”

mentioning

confidence: 99%

Preparation and Photoluminescence of GdVO₄:Eu Nanophosphors for Flexible and Transparent Displays

Kim¹,

Huh²

2011

Bulletin of the Korean Chemical Society

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Europium ion doped metal orthovanadate (MVO 4 :Eu, M = Y, Gd, La) has been widely used as commercial red-emitting phosphors in cathode ray tubes (CRTs), and fluorescent lamps, 1,2 with photoluminescence quantum yields of up to 95%.3,4 Commercial micron-sized MVO 4 :Eu phosphors are generally prepared by high-temperature solid-state reactions. However, these micron-sized phosphors cannot be used in flexible and transparent displays due to their high scattering. Because nano-sized materials do not show any scattering in the visible region, inorganic nanophosphors have received much attention for their applicability in flexible and transparent display devices. 5-7MVO 4 :Eu nanophosphors have been prepared by soft reactions, such as hydrothermal, solvothermal, sonochemical, microemulsion, and polymer-assisted methods.8-14 Despite there have been numerous studies of the synthesis of MVO 4 :Eu nanophosphors, most attention has focused on the synthesis of powder-type MVO 4 :Eu phosphors. Monodispersed nanophosphors prepared by soft reactions can easily agglomerate in organic solvents. Transparent suspensions of nanophosphors without an agglomeration in organic solvents are needed for these phosphors to be used in flexible and transparent displays. However, there are few reports of preparing transparent suspensions of nanophosphors. Transparent suspensions of small amounts of YVO 4 :Eu nanophosphors in hexane have been prepared using surfactant-assisted hydrothermal reactions in a waterhexane bilayer system.15 In this system, most of the YVO 4 :Eu nanophosphors aggregated in the water phase that is not adequate for the flexible and transparent displays. New methods for the large-scale synthesis of nanophosphors are required that can prepare phosphors in single organic solvent phase. This work reports the first simple method of preparing transparent suspensions of GdVO 4 :Eu nanophosphors in toluene. The optimal conditions for the phosphors' bright emission were also examined.GdVO 4 :Eu nanophosphors were prepared by solvothermal reactions from Gd-oleate, Eu-oleate, and tetraoctylammonium-VO 4 complexes in toluene in the presence of oleic acid and oleylamine. Gd-oleate and Eu-oleate were obtained by transferring aqueous Gd(NO 3 ) 3 and Eu(NO 3 ) 3 to the toluene phase by adding sodium oleate in toluene. Tetraoctylammonium-VO 4 was obtained by transferring NH 4 VO 3 in water with NH 4 OH to toluene by introducing tetraoctylammonium bromide in toluene. Typical powder X-ray diffraction (XRD) patterns of GdVO 4 :Eu phosphors prepared at 80°C (Figure 1) indicated a structure matching that of tetragonal GdVO 4 (JCPDS 17-0260, a = 0.7212 nm, c = 0.6348 nm). The ionic radius of Eu 3+ (0.0950 nm) is slightly larger than that of Gd 3+ (0.0938 nm), Eu 3+ ions are allowed to its facile occupation of Gd 3+ sites in the host GdVO 4 structure. 16 The broad XRD peak also indicates that the GdVO 4 :Eu was present as nanoparticles. The XRD patterns confirm that the GdVO 4 :Eu phosphor was synthesized without impurities. High-resolution tr...

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Photoluminescence in GdVO 4 :Bi 3+ , Eu 3+ red phosphor

Cited by 95 publications

References 1 publication

Predicting metal-to-metal charge transfer in closed-shell transition metal oxides doped with Bi3+ or Pb2+

Predicting metal-to-metal charge transfer in closed-shell transition metal oxides doped with Bi3+ or Pb2+

Dependence of Eu3+ luminescence dynamics on the structure of the combustion synthesized Sr5(PO4)3F host

Preparation and Photoluminescence of GdVO₄:Eu Nanophosphors for Flexible and Transparent Displays

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Photoluminescence in GdVO 4 :Bi 3+ , Eu 3+ red phosphor

Cited by 95 publications

References 1 publication

Predicting metal-to-metal charge transfer in closed-shell transition metal oxides doped with Bi3+ or Pb2+

Predicting metal-to-metal charge transfer in closed-shell transition metal oxides doped with Bi3+ or Pb2+

Dependence of Eu3+ luminescence dynamics on the structure of the combustion synthesized Sr5(PO4)3F host

Preparation and Photoluminescence of GdVO4:Eu Nanophosphors for Flexible and Transparent Displays

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Preparation and Photoluminescence of GdVO₄:Eu Nanophosphors for Flexible and Transparent Displays