Charge transfer transitions in the transition metal oxides ABO4:Ln3+ and APO4:ln3+ (A=La, Gd, Y, Lu, Sc; B=V, Nb, Ta; Ln=lanthanide)

Krumpel, Andreas H.; Boutinaud, Philippe; Kolk, Erik van der; Dorenbos, P.

doi:10.1016/j.jlumin.2010.02.035

Cited by 79 publications

(47 citation statements)

References 75 publications

(76 reference statements)

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“…Ref. [29] is the last publication that summarizes ionization and CT energies for Ln 3+ ions in ABO 4 lattices. This paper defines three types of charge transfer transitions, (i) band to band transition, (ii) ionization of Ln 3+ ion and (iii) transition of electron from VB to the Ln 3+ .…”

Section: Discussionmentioning

confidence: 99%

Excited states dynamics under high pressure in lanthanide-doped solids

Grinberg

2011

Journal of Luminescence

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Section: Discussionmentioning

confidence: 99%

Excited states dynamics under high pressure in lanthanide-doped solids

Grinberg

2011

Journal of Luminescence

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“…45,46 Specific compositions were developed for applications in the field of electronic and optical applications. [47][48][49] The authors demonstrated that the light emission properties are directly linked to the doping elements substituted in the structure.…”

Section: Introductionmentioning

confidence: 99%

Crystal chemistry of the monazite structure

Clavier

Podor

Dacheux

2011

Journal of the European Ceramic Society

344

243

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“…The E CT of Eu 3+ doped phosphors with different host lattices has been widely studied. [12][13][14][15][16][17][18][19] Blasse 12 suggested that the electrostatic potential at the O 2− ligand is largely determining the energy of the CT-band, whereas Hoefdraad 13 indicated that the E CT in some classes of phosphors may be described with Jørgensen …”

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Red Shift of CT-Band in Cubic Y₂O₃:Eu³⁺upon Increasing the Eu³⁺Concentration

Engelsen

Ireland

Dhillon

et al. 2016

ECS J. Solid State Sci. Technol.

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In this article we describe the redshift of the charge transfer band of nanosized cubic (Y 1−x Eu x ) 2 O 3 upon increasing the Eu 3+ concentration. This redshift amounts to 0.43 eV (25 nm) in going from 0.1 Mol % Eu 3+ to 100 Mol % (which is pure Eu 2 O 3 ). The charge transfer band consists of two broad sub-bands; both shift almost parallel with the Eu 3+ concentration and are related to the two symmetry sites for the cation, C 2 and C 3i , in the bixbyite-type lattice. The area ratio of the bands is 3:1 and is the first direct evidence for the population of the two lattice sites by the Eu 3+ cations being in accord with the crystal structure ratio. A model is presented that quantitatively describes the redshift of the charge transfer band of (Y The red luminescent phosphor Y 2 O 3 :Eu 3+ has been studied extensively, because of its rather high efficiency and high stability to electron bombardment, UV-irradiation and ion bombardment. These attributes led cubic Y 2 O 3 :Eu 3+ to be widely employed in cathode ray tubes (projection tubes) and it is still used in fluorescent lamps. Many properties of this phosphor have been studied by photoluminescence (PL) and cathodoluminescence (CL) spectrometry and have been well documented, because of its industrial applications. Notwithstanding the extensive literature on Y 2 O 3 :Eu 3+ , voids still exist in our knowledge on this phosphor. One of these voids is related to the position of the charge transfer (CT) band in the excitation spectrum, although this subject has been widely studied. In the present study we shall focus on the position of the CT-band, which is located at 253 nm in Y 2 O 3 when doped with 0.1 Mol % Eu 3+ . 1 The wavelength of the maximum of the CT-band in Y 2 O 3 :Eu 3+ , indicated by the E CT in this study and expressed in nanometers (nm) or electron-volts (eV) depends on the concentration of the Eu 3+ dopant and the size of the phosphor particles.2-10 Upon increasing the Eu 3+ concentration between 1 and 15 Mol % a redshift of the E CT of about 6 nm has been observed, [2][3][4] whereas Kang et al. 5 did not observe a change of E CT in increasing the Eu 3+ dope from 2 to 10 Mol %. Some peculiar observations were reported on the effect of the particle size of Y 2 O 3 :Eu 3+ . Igarashi et al. 6 reported a blueshift of the E CT of 6 nm in reducing the particle size from 2.1 μm to 56 nm; Fu et al.7 measured a blueshift of 5 nm in reducing the particle size from 2.1 μm down to 10 nm. The opposite trend was found by others. Jia et al.8 measured a redshift of the E CT of 6 nm upon particle size reduction from 2-3 μm to 7 nm. Shang et al. 9 and Zhang et al. 10 reported large red shifts, 11 nm and 7 nm, in reducing the size of Y 2 O 3 :Eu 3+ nanoparticles from 40 nm to 9 nm and from 40 nm to 5 nm respectively. Semiconductor particles are expected to show a blueshift of their absorption peaks in reducing the particle size from 15 to 5 nm because of quantum confinement.11 The observed opposite trend indicates that quantum confinement cannot explain the reported ...

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Charge transfer transitions in the transition metal oxides ABO4:Ln3+ and APO4:ln3+ (A=La, Gd, Y, Lu, Sc; B=V, Nb, Ta; Ln=lanthanide)

Cited by 79 publications

References 75 publications

Excited states dynamics under high pressure in lanthanide-doped solids

Excited states dynamics under high pressure in lanthanide-doped solids

Crystal chemistry of the monazite structure

Red Shift of CT-Band in Cubic Y₂O₃:Eu³⁺upon Increasing the Eu³⁺Concentration

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Charge transfer transitions in the transition metal oxides ABO4:Ln3+ and APO4:ln3+ (A=La, Gd, Y, Lu, Sc; B=V, Nb, Ta; Ln=lanthanide)

Cited by 79 publications

References 75 publications

Excited states dynamics under high pressure in lanthanide-doped solids

Excited states dynamics under high pressure in lanthanide-doped solids

Crystal chemistry of the monazite structure

Red Shift of CT-Band in Cubic Y2O3:Eu3+upon Increasing the Eu3+Concentration

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Red Shift of CT-Band in Cubic Y₂O₃:Eu³⁺upon Increasing the Eu³⁺Concentration