Properties of ytterbium and neodymium doped alkali metal yttrium double phosphates of the M3Y1−Ln (PO4)2 type

Aitasalo, T.; Guzik, M.; Szuszkiewicz, W.; Hölsä, Jorma; Keller, Barbara; Legendziewicz, J.

doi:10.1016/j.jallcom.2004.03.066

“…1b are much more similar which suggests that they have the same structure as the hexagonal rubidium yttrium double phosphates. Absorption spectra at room and liquid helium temperatures show the 2 F 7/2 Ǟ 2 F 5/2 transition in absorption in the lutetium double phosphates similar to the analogous yttrium compounds as studied previously [9]. The f-f tran- sition of Yb 3ϩ is observed in the IR region.…”

Section: Resultssupporting

confidence: 74%

Structural and Optical Characterization of Ytterbium Doped Lutetium Double Phosphates

Guzik

¹

,

Legendziewicz

²

,

Szuszkiewicz

³

et al. 2007

Zeitschrift anorg allge chemie

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Abstract. Powder samples of the ternary phosphates A 3 Lu(PO 4 ) 2 :Yb 3ϩ (A ϭ Na, Rb) have been synthesised by solid state reactions. The spectroscopic properties of Yb 3ϩ in double phosphate host lattices were investigated using absorption, emission and excitation spectra at 4, 10 and 293 K in the VUV to IR range. The results obtained for both types of phosphates are compared. Together with the fundamental 2 F 5/2 Ǟ 2 F 7/2 emission in the IR range, a broad band emission with two peaks in the UV region Compounds containing Yb 3ϩ ions have potential applications as laser devices because of their simple electronic structure. There is no concentration quenching and no excited state absorption reducing the effective laser crossrelaxation process. The Yb 3ϩ ion exhibits intense and broad absorption bands in the IR region which is suitable for a diode-pumped laser. It was reported that ytterbium-doped lasers have longer emission lifetimes than the Nd 3ϩ -doped materials. All these properties of Yb 3ϩ indicate that the ytterbium-doped materials seem to be more promising than the neodymium-doped systems, already employed in laser materials. The fundamental luminescence of the Yb 3ϩ ion originating from the 2 F 5/2 Ǟ 2 F 7/2 transitions between the manifold of Stark-splitted levels occur in the IR range around 1000 nm.While searching for interesting laser host materials for solid state lasers, alkali rare-earth double phosphates of the M 3 RE(PO 4 ) 2 type were studied by several authors [1Ϫ10]. These compounds have their host absorption edge at a rather short wavelength which makes them suitable as host lattices for various luminescent materials.In addition to the intraconfigurational 4f-4f transitions, a broad emission band (called charge transfer band, CT) were observed in Yb 3ϩ -activated Na 3 Lu(PO 4 ) 2 . The second emission is due to a chargeϪtransfer transition type. The influence of the alkali metal cation site of the host lattice on the luminescence properties was investigated. The tentative energy level scheme of the ground and excited 2 F J (Jϭ7/2, 5/2) levels is described.

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“…1b are much more similar which suggests that they have the same structure as the hexagonal rubidium yttrium double phosphates. Absorption spectra at room and liquid helium temperatures show the 2 F 7/2 Ǟ 2 F 5/2 transition in absorption in the lutetium double phosphates similar to the analogous yttrium compounds as studied previously [9]. The f-f tran- , the additional components observed in the spectra at 4 K can be due to the strong electron-phonon coupling and can be of vibronic and/or of cooperative origin.…”

Section: Methodssupporting

confidence: 72%

Structural and Optical Characterization of Ytterbium Doped Lutetium Double Phosphates.

Guzik

¹

,

Legendziewicz

²

,

Szuszkiewicz

³

et al. 2007

Self Cite

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Abstract. Powder samples of the ternary phosphates A 3 Lu(PO 4 ) 2 :Yb 3ϩ (A ϭ Na, Rb) have been synthesised by solid state reactions. The spectroscopic properties of Yb 3ϩ in double phosphate host lattices were investigated using absorption, emission and excitation spectra at 4, 10 and 293 K in the VUV to IR range. The results obtained for both types of phosphates are compared. Together with the fundamental 2 F 5/2 Ǟ 2 F 7/2 emission in the IR range, a broad band emission with two peaks in the UV region Compounds containing Yb 3ϩ ions have potential applications as laser devices because of their simple electronic structure. There is no concentration quenching and no excited state absorption reducing the effective laser crossrelaxation process. The Yb 3ϩ ion exhibits intense and broad absorption bands in the IR region which is suitable for a diode-pumped laser. It was reported that ytterbium-doped lasers have longer emission lifetimes than the Nd 3ϩ -doped materials. All these properties of Yb 3ϩ indicate that the ytterbium-doped materials seem to be more promising than the neodymium-doped systems, already employed in laser materials. The fundamental luminescence of the Yb 3ϩ ion originating from the 2 F 5/2 Ǟ 2 F 7/2 transitions between the manifold of Stark-splitted levels occur in the IR range around 1000 nm.While searching for interesting laser host materials for solid state lasers, alkali rare-earth double phosphates of the M 3 RE(PO 4 ) 2 type were studied by several authors [1Ϫ10]. These compounds have their host absorption edge at a rather short wavelength which makes them suitable as host lattices for various luminescent materials.In addition to the intraconfigurational 4f-4f transitions, a broad emission band (called charge transfer band, CT)

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“…The results obtained have been compared with the same type of yttrium double phosphates which have been already reported in our earlier paper [13].…”

Section: Introductionmentioning

confidence: 75%

“…Also, in the red phosphor used in fluorescent tubes (Y 2 O 3 :Eu 3+ ) UV radiation is efficiently absorbed by a transition to the charge transfer state of the Eu 3+ ion. The properties of alkali rare earth double phosphates of the M 3 RE(PO 4 ) 2 type have been studied as photoluminescent materials by several authors [5][6][7][8][9][10][11][12][13][14]. These double phosphates have their host absorption edge at a rather short wavelength which make them suitable as the host lattices for various luminescent materials including laser devices.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and optical properties of powders of lutetium and yttrium double phosphates-doped by ytterbium

Guzik

¹

,

Legendziewicz

²

,

Szuszkiewicz

³

et al. 2007

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This contribution is devoted to the new ytterbium-doped alkali metal lutetium double phosphates and their structural and spectroscopic characterisations. The absorption, emission and excitation spectra have been measured at 4, 10 and 293 K in the VUV to IR range. The results have been compared with the analogous yttrium phosphates. The luminescence spectra of the double phosphates have been recorded using various excitation lines, including the synchrotron radiation. The low temperature absorption and emission spectra in the region of the 2 F 7/2 ! 2 F 5/2 transition together with the IR spectra have been used to assign the electronic and vibronic components. Detailed analysis of the Yb 3+ -doped sodium lutetium double phosphates has been performed to determine the energy levels in these hosts and to compare their optical behaviour with analogous sodium yttrium double phosphates. The emission and excitation spectra have been investigated using synchrotron radiation and the origin of the emission has been analysed proving that the emission occurs from the charge transfer state.

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Properties of ytterbium and neodymium doped alkali metal yttrium double phosphates of the M3Y1−Ln (PO4)2 type

Cited by 34 publications

References 22 publications

Structural and Optical Characterization of Ytterbium Doped Lutetium Double Phosphates

Structural and Optical Characterization of Ytterbium Doped Lutetium Double Phosphates

Structural and Optical Characterization of Ytterbium Doped Lutetium Double Phosphates.

Synthesis and optical properties of powders of lutetium and yttrium double phosphates-doped by ytterbium

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