Visible quantum cutting in Eu3+-doped gadolinium fluorides via downconversion

Wegh, R. T.; Donker, H.; Oskam, K.D; Meijerink, Andries

doi:10.1016/s0022-2313(99)00042-3

Cited by 165 publications

(109 citation statements)

References 21 publications

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“…The third set of 4f5d bands has a 4f5d onset at 208 nm. By comparison of the luminescence spectra of the intraconfigurational 4f 2 transitions with literature data, these transitions are assigned to Pr 3+ on an L site. Excitation in these 4f5d band yields 1 …”

Section: Dmentioning

confidence: 91%

“…Excitation in the 4f5d bands of this site yields strong 4f5d emissions in the UV/VIS part of the spectrum and also weaker intraconfigurational 4f 2 emissions. By comparing the intraconfigurational 4f emissions and their decay times with data from the literature, these 4f5d bands are assigned to transitions on Pr 3+ ions on a site with C 4V symmetry.…”

Section: Dmentioning

confidence: 93%

“…[1][2][3][4][5][6]. Such phosphors are called quantum cutters and can be applied to convert VUV radiation efficiently into visible light, for instance in mercury-free fluorescent tubes and plasma display panels.…”

Section: Introductionmentioning

confidence: 99%

“…Up to now, a few compounds have been found that show visible quantum cutting (e.g. LiGdF 4 : Eu 3+ [1,2] and LiGdF 4 : Er 3+ , Tb 3+ [3]). Visible quantum cutting is accomplished in these substances via downconversion processes, in which energy transfer between different types of rare earth ions is involved.…”

Section: Introductionmentioning

confidence: 99%

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Site selective 4f5d spectroscopy of CaF2:Pr3+

Oskam

Houtepen

Meijerink

2002

Journal of Luminescence

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Spectroscopic investigations were performed on a single crystal of CaF 2 doped with 0.05% Pr 3+ . Three different Pr 3+ sites with different luminescent properties were identified. The 4f 2 -4f 1 5d 1 excitation spectrum of the first site has a sharp maximum at 221.3 nm. Excitation in the 4f5d bands of this site yields strong 4f5d emissions in the UV/VIS part of the spectrum and also weaker intraconfigurational 4f 2 emissions. By comparing the intraconfigurational 4f emissions and their decay times with data from the literature, these 4f5d bands are assigned to transitions on Pr 3+ ions on a site with C 4V symmetry. The fd excitation spectrum of the second site has a zero phonon line at 223.3 nm. Upon selective excitation in this band, only 4f5d emission is observed. Probably, these 4f5d bands correspond to Pr 3+ ions on a O h site. The third set of 4f5d bands has a 4f5d onset at 208 nm. By comparison of the luminescence spectra of the intraconfigurational 4f 2 transitions with literature data, these transitions are assigned to Pr 3+ on an L site. Excitation in these 4f5d band yields 1 S 0 emission followed by emission from the 3 P 0 state. The present results clarify some contradictions reported in the literature. r

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Section: Dmentioning

confidence: 91%

Section: Dmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Site selective 4f5d spectroscopy of CaF2:Pr3+

Oskam

Houtepen

Meijerink

2002

Journal of Luminescence

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“…The finding of multi-photon emission through downconversion has provided new excitement in the search for phosphors with quantum efficiencies exceeding unity [105,106,107]. The couple Gd 3+ -Eu 3+ offers the possibility to obtain efficiencies near 200%.…”

Section: Introductionmentioning

confidence: 99%

Multi-Photon Phosphor Feasibility Research

Graham¹,

Chow²

2003

199

341

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Luminescence

Fouassier¹

2005

Encyclopedia of Inorganic Chemistry

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This chapter is devoted to the luminescence of inorganic compounds. Luminescence characteristics are strongly host‐dependent. This is illustrated by various examples of the influence of covalency, crystal field, phonon energies, and structural features. The chapter is organized as follows. Section 2 describes the fundamentals of luminescence: probability of electronic transitions, shape of emission bands, quantum efficiency, energy transfer, and factors governing the position of the emitting level (nephelauxetic effect and crystal field splitting). Section 3 reviews the main families of luminescent ions: transition metal ions, lanthanide ions, and s 2 ions. The various types of electronic transitions responsible for the luminescence of transition and lanthanide ions are presented: nd → nd, (n + 1)s → nd, and charge transfer (CT) transitions for the former, 4f → 4f, 5d → 4f, and CT transitions for the latter. Data are given on the luminescence wavelength range, excited‐state lifetimes, thermal stability, and concentration quenching. Section 4 deals with donor‐acceptor transitions in ZnS. Section 5 presents the luminescence mechanisms for excitation through the host lattice. Vacuum ultraviolet (VUV), electron beam, X‐ray, and γ‐ray excitation are considered. The most efficient luminescent materials are given for the various types of excitation. Section 6 deals with electroluminescent materials.

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Visible quantum cutting in Eu3+-doped gadolinium fluorides via downconversion

Cited by 165 publications

References 21 publications

Site selective 4f5d spectroscopy of CaF2:Pr3+

Site selective 4f5d spectroscopy of CaF2:Pr3+

Multi-Photon Phosphor Feasibility Research

Luminescence

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