Nature of the charge transfer states of the trigonal and tetragonal Eu3+ centers in CdF2 crystals

Hommel, D.; Langer, Judith

doi:10.1016/0022-2313(79)90121-2

Cited by 24 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When constructing the energy level diagram of the CdF 2 : RE 2+ crystal, the energy position of the Eu 2+ 4f level (0.35 eV) with respect to the bottom of the conduction band [16] and a number of spectral characteristics [17,18] served as the main reference point.…”

Section: Resultsmentioning

confidence: 99%

Location of the energy levels of the rare-earth ions in BaF2 and CdF2

2008

View full text Add to dashboard Cite

-The location of the energy levels of rare-earth ( RE ) elements in the energy band diagram of BaF 2 and CdF 2 crystals is determined. The role of RE 3+ and RE 2+ ions in the capture of charge carriers, luminescence, and the formation of radiation defects is evaluated. It is shown that the substantial difference in the luminescence properties of BaF 2 : RE and CdF 2 : RE is associated with the location of the excited energy levels in the band diagram of the crystals.

show abstract

Section: Resultsmentioning

confidence: 99%

Location of the energy levels of the rare-earth ions in BaF2 and CdF2

2008

View full text Add to dashboard Cite

show abstract

“…7). In fact, Hommel et al [8] reported that in CaF 2 the intensity of the "totally forbidden" 5 D 0 -7 F 0 transition increases, if oxygen is present in the vicinity of the Eu 3+ ions.…”

Section: Full Papermentioning

confidence: 99%

“…This has been thoroughly investigated for NaGdF 4 :Eu 3+ [5][6][7] and a variety of other fluoride hosts. [8][9][10][11] The structure of cubic NaYF 4 (and cubic NaGdF 4 , space group Fm3 m, n°225) is isomorphic with CaF 2 in which the calcium ions have been substituted randomly by sodium and yttrium ions. The cationic site in CaF 2 has O h symmetry and it is has been proposed that the O h symmetry is retained in cubic NaYF 4 .…”

Section: Introductionmentioning

confidence: 99%

Crystal Phase Control of Luminescing α‐NaGdF₄:Eu³⁺and β‐NaGdF₄:Eu³⁺ Nanocrystals

Ptáček

Schäfer

Kömpe

et al. 2007

Adv Funct Materials

164

105

View full text Add to dashboard Cite

NaGdF4:Eu3+, NaEuF4, and NaGdF4 nanocrystals were synthesized in the high‐boiling coordinating solvent N‐(2‐hydroxyethyl)‐ethylenediamine (HEEDA). Phase pure nanomaterials, crystallizing either in the cubic α‐phase or the hexagonal β‐phase, were obtained by adjusting one reaction parameter only, i.e., the molar ratio between metal and fluoride ions in the synthesis. The hexagonal β‐phase is formed, if this molar ratio is close to stoichiometric, whereas the cubic α‐phase is obtained in the presence of excess metal ions. The optical properties of the Eu3+ doped samples are different for the two crystal phases. The results indicate an increased number of oxygen impurities close to Eu3+ ions, if excess metal ions are used in the synthesis.

show abstract

Photoluminescence of rare-earth centers in ZnO phosphors

Quang

Liem

Thành

et al. 1983

Phys. Stat. Sol. (a)

View full text Add to dashboard Cite

Nature of the charge transfer states of the trigonal and tetragonal Eu3+ centers in CdF2 crystals

Cited by 24 publications

References 3 publications

Location of the energy levels of the rare-earth ions in BaF2 and CdF2

Location of the energy levels of the rare-earth ions in BaF2 and CdF2

Crystal Phase Control of Luminescing α‐NaGdF₄:Eu³⁺and β‐NaGdF₄:Eu³⁺ Nanocrystals

Photoluminescence of rare-earth centers in ZnO phosphors

Contact Info

Product

Resources

About

Nature of the charge transfer states of the trigonal and tetragonal Eu3+ centers in CdF2 crystals

Cited by 24 publications

References 3 publications

Location of the energy levels of the rare-earth ions in BaF2 and CdF2

Location of the energy levels of the rare-earth ions in BaF2 and CdF2

Crystal Phase Control of Luminescing α‐NaGdF4:Eu3+and β‐NaGdF4:Eu3+ Nanocrystals

Photoluminescence of rare-earth centers in ZnO phosphors

Contact Info

Product

Resources

About

Crystal Phase Control of Luminescing α‐NaGdF₄:Eu³⁺and β‐NaGdF₄:Eu³⁺ Nanocrystals