6533b7d6fe1ef96bd1265a4c
RESEARCH PRODUCT
Oxygen influence on luminescence properties of rare-earth doped NaLaF 4
Anatolijs SarakovskisA. TuomelaMarko HuttulaSebastian VielhauerLiga GrinbergaG. DokeVladimir Pankratovsubject
ChemistryDopingBiophysicsAnalytical chemistrychemistry.chemical_element02 engineering and technologyGeneral Chemistry021001 nanoscience & nanotechnologyCondensed Matter PhysicsPhotochemistry01 natural sciencesBiochemistryOxygenAtomic and Molecular Physics and OpticsIonAbsorption band0103 physical sciences010306 general physics0210 nano-technologySpectroscopyLuminescenceEuropiumExcitationdescription
Abstract Luminescence properties of erbium and europium doped NaLaF4 with different oxygen content have been studied. Vacuum ultraviolet (VUV) excitation luminescence spectroscopy technique has been applied by using synchrotron radiation excitation. It was found that oxygen impurity leads to significant degradation of Er3+ or Eu3+ emission under VUV excitation. The intensive O2−–Er3+ charge transfer excitation band has been detected from oxygen abundant NaLaF4 in the 150–165 nm spectral range. This band reveals a competing absorption mechanism in oxygen containing NaLaF4. It is clearly demonstrated that one reason for the Er3+ emission degradation in oxygen abundant NaLaF4 is strong suppression of 4f–5d transitions in Er3+ ion. The degradation of the Eu3+ emission under VUV excitation was explained by diminishing of F−–Eu3+ charge transfer absorption band as well as by competing relaxation centers in the oxygen abundant NaLaF4.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-11-01 | Journal of Luminescence |