A comparison of the transition metal 3d1 crystal field splitting with the lanthanide 5d1 crystal field splitting in compounds

Rogers, E.G.; Dorenbos, P.

doi:10.1016/j.jlumin.2014.06.039

Cited by 17 publications

(15 citation statements)

References 77 publications

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“…While the position of the 4f n level remains at more or less the same energy, the 5d 1 position shifts significantly, leading to changes in the energy difference between ground and excited state. The effects that influence the 5d levels are the same as those reported for the 3d states of transition metal ions‐number and type of ligands, coordination arrangement, crystal field splitting, nephelauxetic effect or degree of covalency and, in the solid state, also the type of cation site. Consequently, for instance, Eu 2+ in some nitrides, emits in the orange or red color region, while UV emission can be found in some fluorides .…”

Section: Introductionmentioning

confidence: 58%

Recent Advances in Rare Earth‐Doped Hydrides

Kunkel

Wylezich

2018

Zeitschrift anorg allge chemie

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The optical properties of rare earth ions in different inorganic host materials, for instance oxides, silicates, borates, or nitrides, have been used in applications for many years, from color TV to fluorescent tubes, lasers, or pc-LEDs. However, rare earth metal ion-doped hydrides have not really been considered as host lattices and up to now only been studied in a relatively small number of investigations. Yet, for certain metal hydrides these studies, e.g., allowed the determination * Dr. N. Kunkel 137of the crystal field strength and nephelauxetic effect of the hydride anion using the Eu 2+ 5d excited state. In air-sensitive hydrides, the use may be restricted to fundamental studies and local probes. But recently more and more air-stable mixed anionic hydrides have been discovered, which may serve as hosts. This short review summarizes the synthesis and characterization of rare earth metal ion-doped hydrides reported so far.

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Section: Introductionmentioning

confidence: 58%

Recent Advances in Rare Earth‐Doped Hydrides

Kunkel

Wylezich

2018

Zeitschrift anorg allge chemie

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“…[170][171][172] Positive correlations showed up, however with an accuracy which is worse than for similar rules for the lanthanides, standard errors being typically of the order of 0.5 eV. Rogers and Dorenbos gathered data to extend the chemical shift model to transition metal ions with a nd 1 ground state configuration (n = 3, 4, 5).…”

Section: Roads For Improvementmentioning

confidence: 99%

Energy level modeling of lanthanide materials: review and uncertainty analysis

Joos

Poelman

Smet

2015

Phys. Chem. Chem. Phys.

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Energy level schemes are an essential tool for the description and interpretation of atomic spectra. During the last 40 years, several empirical methods and relationships were devised for constructing energy level schemes of lanthanide defects in wide band gap solids, culminating in the chemical shift model by Thiel and Dorenbos. This model allows us to calculate the electronic and optical properties of the considered materials. However, an unbiased assessment of the accuracy of the obtained values of the calculated parameters is still lacking to a large extent. In this paper, error margins for calculated electronic and optical properties are deduced. It is found that optical transitions can be predicted within an acceptable error margin, while the description of phenomena involving conduction band states is limited to qualitative interpretation due to the large error margins for physical observables such as thermal quenching temperature, corresponding to standard deviations in the range 0.3-0.5 eV for the relevant energy differences. As an example, the electronic structure of lanthanide doped calcium thiogallate (CaGa2S4) is determined, taking the experimental spectra of CaGa2S4:Ln(Q+) (Ln(Q+) = Ce(3+), Eu(2+), Tm(3+)) as input. Two different approaches to obtain the shape of the zig-zag curves connecting the 4f levels of the different lanthanides are explored and compared.

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“…E V2+ and E Sc2+ in YAGG were spread near -3.30±0.22 eV and -2.88±0.06eV, respectively. The VRBE of the single electron in the lowest energy 3d, 4d, and 5d levels in group IIIa, IVa, Va and VIa transition metal (TM) and lanthanide (Ln) ions spread ±1 eV around a mean value[20][21][22][23]. Therefore, it is regarded that the VRBE of each TM 2+ in Y 3 Al 5-x Ga x O 12 has the reasonable range.…”

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confidence: 99%