Luminescence of Ce3+ in Ca0.65La0.35F2.35 host

Pote, S.S.; Joshi, C. P.; Moharil, S. V.; Muthal, P. L.; Dhopte, S.M.

doi:10.1016/j.jlumin.2009.11.013

Cited by 11 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CaF 2 can also incorporate either divalent ions at Ca 2+ sites, or trivalent ions by incorporation of F − interstitials. Such substitutions lead to significant modifications of luminescence spectra .…”

Section: Introductionmentioning

confidence: 99%

Modification of luminescence spectra of CaF₂: Eu²⁺

Singh

Joshi²,

Moharil

et al. 2015

Luminescence

View full text Add to dashboard Cite

CaF2:Eu(2+) is a well known phosphor having efficient excitation in the near ultraviolet (NUV) range. Phosphors with NUV excitation are required in newly emerging applications such as photoluminescence liquid crystal displays (PLLCD), solid-state lighting (SSL), and down-conversion for solar cells. However, emission of CaF2:Eu(2+) is around 424 nm. Eye sensitivity drops considerably at these wavelengths. It is thus not useful for display applications for which emission in one of the primary colours (blue - 450 nm, green - 540 nm or red - 610 nm) is required. Efforts were made to modify the Photoluminescence (PL) spectra of CaF2:Eu(2+) to meet these requirements using co-dopants. A Ca0.49 Sr0.50 Eu0.01 F2 phosphor showing better colour coordinates and having an emission maximum around 440 nm was discovered during these studies.

show abstract

Section: Introductionmentioning

confidence: 99%

Modification of luminescence spectra of CaF₂: Eu²⁺

Singh

Joshi²,

Moharil

et al. 2015

Luminescence

View full text Add to dashboard Cite

show abstract

“…These findings cumulatively suggest substitutional doping of Ln at Ca sites. Various other researchers also discussed that Ln can displace Ca sites in CaF 2 with introduction of fluoride at interstitial positions. − …”

Section: Resultsmentioning

confidence: 99%

Maximizing Terbium–Europium Electronic Interaction: Insight from Variation of Excitation Energy

2023

View full text Add to dashboard Cite

This work investigates the tuning of electronic interaction between excited Tb3+ (Tb3+*) and Eu3+ by varying the excitation wavelengths, which consist of different electronic origins spanning the entire range of excitation spectra. Direct excitation bands of trivalent lanthanide cations (Ln3+) are accessed in the Ln-doped calcium fluoride, Ca(Ln)F2, nanoparticles (NPs). The experimental outcomes from the NPs are compared to that in the bulk solvent with freely floating entities. Remarkable excitation wavelength-dependent Tb3+–Eu3+ electronic interaction is observed in the NPs, with 370 nm excitation of Tb3+ being found to provide the optimum energy to maximize the Eu3+ emission. This excitation energy dependence is found to be less prominent in the bulk medium. Different mechanisms for Tb3+–Eu3+ electronic interaction are argued to be operative in the confined NP and bulk environments. The energy transfer efficiency from Tb3+* to Eu3+ in NPs can be maximized by (i) sole excitation of Tb3+ and (ii) maintaining the energy difference between the excitation energy and the Eu2+ ground energy level in the range of 4500–7500 cm–1. Additionally, we suggest the necessity of concomitant consideration of the steady-state and time-resolved response of both Tb3+ and Eu3+ emissions to decipher the Tb3+* → Eu3+ electronic interactions, instead of considering a single parameter to gauge such a process. These findings collectively provide important insights to design Tb–Eu-containing luminophores for their potential use in multiplex assays.

show abstract

“…Recently, rare earth (RE)-doped nanomaterials have attracted much attention [1][2][3][4][5], due to their potential applications such as advanced phosphor [6], display monitors [7], light amplification [8], and biological labeling [9,10], etc. Among these host materials, calcium fluoride (CaF 2 ) is an attractive host for RE doping because of its high transparency in a wide wavelength region and low phonon energy [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

The Electrical Properties of Tb-Doped CaF2 Nanoparticles under High Pressure

Cui

Wang

et al. 2018

Crystals

View full text Add to dashboard Cite

The high-pressure transport behavior of CaF 2 nanoparticles with 3 mol% Tb concentrations was studied by alternate-current impedance measurement. All of the electrical parameters vary abnormally at approximately 10.76 GPa, corresponding to the fluorite-cotunnite structural transition. The substitution of Ca 2+ by Tb 3+ leads to deformation in the lattice, and finally lowers the transition pressure. The F − ions diffusion, electronic transport, and charge-discharge process become more difficult with the rising pressure. In the electronic transport process, defects at grains play a dominant role. The charge carriers include both F − ions and electrons, and electrons are dominant in the transport process. The Tb doping improves the pressure effect on the transport behavior of CaF 2 nanocrystals.

show abstract

Luminescence of Ce3+ in Ca0.65La0.35F2.35 host

Cited by 11 publications

References 23 publications

Modification of luminescence spectra of CaF₂: Eu²⁺

Modification of luminescence spectra of CaF₂: Eu²⁺

Maximizing Terbium–Europium Electronic Interaction: Insight from Variation of Excitation Energy

The Electrical Properties of Tb-Doped CaF2 Nanoparticles under High Pressure

Contact Info

Product

Resources

About

Luminescence of Ce3+ in Ca0.65La0.35F2.35 host

Cited by 11 publications

References 23 publications

Modification of luminescence spectra of CaF2: Eu2+

Modification of luminescence spectra of CaF2: Eu2+

Maximizing Terbium–Europium Electronic Interaction: Insight from Variation of Excitation Energy

The Electrical Properties of Tb-Doped CaF2 Nanoparticles under High Pressure

Contact Info

Product

Resources

About

Modification of luminescence spectra of CaF₂: Eu²⁺

Modification of luminescence spectra of CaF₂: Eu²⁺