Identification of charge transfer (CT) transition in (Gd,Y)BO3:Eu phosphor under 100–300 nm

Wang, Yuhua; Guo, Xuan; Endo, Tadashi; Murakami, Yukio; Ushirozawa, Mizumoto

doi:10.1016/j.jssc.2004.03.003

Cited by 133 publications

(58 citation statements)

References 19 publications

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“…Third, the H-band intensity in the PLE spectra increases by several times when Gd crystal [19]. The carbonate crystals exhibit, apparently, a similar scenario involving a complex oxyanion CO 3 2À , Table 3.…”

Section: Charge Transfer Transitionsmentioning

confidence: 85%

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Luminescence of Li6Gd(BO3)3 crystals upon ultraviolet and inner-shell excitations

Огородников¹,

Пустоваров²

2013

Journal of Luminescence

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a b s t r a c tThe paper presents the results of the study on luminescence and electronic excitations in Li 6 Gd(BO 3 ) 3 single crystals. The optical and luminescence spectroscopy with a sub-nanosecond time resolution upon selective photoexcitation in the energy range from 3.0 to 650 eV was used to investigate in detail the luminescence of both the Gd 3 þ host ions and Ce 3 þ impurity ions as well as the processes of energy transfer between them. The intrinsic ultraviolet emission at 3.95-3.97 eV due to 6 P j -8 S 7=2 transitions in the Gd 3 þ host ion and the fast luminescence at 2.8-3.0 eV due to 5d-4f 1 dipole-allowed transitions in the Ce 3 þ impurity ion were studied upon excitations through the intracenter, charge transfer, bandto-band, and inner-shell transitions. The specificity of the energy transfer upon excitation of photoluminescence in the energy range of absorption of the inner shells of different atoms of the crystal, as well as in the energy region of the giant resonance of 4d-4f transitions was revealed. On the basis of the experimental data, the bandgap E g ¼9.3 eV, the minimum energy of the 5d-4f 1 and charge transfer transitions were determined. The expected positions of the ground states of the 4f n and 4f nÀ1 5d levels of trivalent lanthanide ions as well as the 4f n þ 1 and 4f n 5d levels of divalent ions were calculated for all the lanthanide ions in Li 6 Gd(BO 3 ) 3 host crystal.

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Section: Charge Transfer Transitionsmentioning

confidence: 85%

“…7. For comparison we present the experimental data for the (Gd,Y)BO 3 crystal, where the CT absorption band O 2À -Gd 3 þ was identified the PLE spectra at 7.47 eV [19].…”

Section: Charge Transfer Transitionsmentioning

confidence: 99%

Luminescence of Li6Gd(BO3)3 crystals upon ultraviolet and inner-shell excitations

Огородников¹,

Пустоваров²

2013

Journal of Luminescence

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“…Recording an excitation spectrum is the preferred method for determining these energy levels in powder samples or in very diluted crystals or solutions, for which measurement of the absorption spectrum is difficult or even impossible. Measurement of the excitation spectrum is also the preferred method for determination of the energy levels of a lanthanide ion in the vacuum ultraviolet (VUV) region [446,[532][533][534][535][536][537][538][539][540]. The main disadvantage of an excitation spectrum is that it cannot be used for studies of intensities of f-f transitions.…”

Section: Excitation Spectramentioning

confidence: 99%

Interpretation of europium(III) spectra

Binnemans

2015

Coordination Chemistry Reviews

2,344

108

1,912

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“…YGB exhibits a high quantum efficiency and is very stable towards heat and radiation, [54,55] in contrast to BAM. However, YGB shows an additional orange emission at 592 nm which is assigned to the 5 …”

Section: The Red Color Pointmentioning

confidence: 99%

Recent Developments in the Field of Inorganic Phosphors

2009

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Because fossil fuels are becoming scarce and because of the expected climate change, our standard of living can only be maintained by a significant increase in energy efficiency. Large amounts of energy are consumed for lighting and during operation of displays. Thus, the targets are the development of economical light sources like white-light-emitting diodes and display panels with enhanced efficiency. Solar energy is converted into electricity by solar cells, and their efficiency must be improved considerably. A possible contribution might be delivered by phosphors which allow the conversion of thermal radiation into electrical energy. Although the target of energy efficiency is very important, we must not overlook that medical imaging diagnostic methods require efficient and sensitive detectors. For the solution of these central questions, inorganic solid-state materials doped with rare-earth ions are very promising and are therefore in the focus of current research activities.

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Identification of charge transfer (CT) transition in (Gd,Y)BO3:Eu phosphor under 100–300 nm

Cited by 133 publications

References 19 publications

Luminescence of Li6Gd(BO3)3 crystals upon ultraviolet and inner-shell excitations

Luminescence of Li6Gd(BO3)3 crystals upon ultraviolet and inner-shell excitations

Interpretation of europium(III) spectra

Recent Developments in the Field of Inorganic Phosphors

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