CdSiO3:Eu3+ nanophosphor: one pot synthesis and enhancement of orange–red emission through Li+ co-doping

Shivakumara, J.; Chikkahanumantharayappa,; Krishna, R. Hari; Ashoka, S.; Nagaraju, G.

doi:10.1007/s10854-018-9419-z

Cited by 11 publications

(5 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Experimental reports have assigned two possible compensation mechanism for CdSiO 3 structure: interstitial oxide ion and Cd-vacancy [12,31]. We can extend this possibility for other cadmium silicate structures taking account results presented in Figures 3 and 4.…”

Section: Resultssupporting

confidence: 59%

Effect of Trivalent Rare Earth Doping in Cadmium Silicates Hosts: A Theoretical Study

Freire¹,

Santos²,

Bispo³

et al. 2022

SSRN Journal

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 59%

Effect of Trivalent Rare Earth Doping in Cadmium Silicates Hosts: A Theoretical Study

Freire¹,

Santos²,

Bispo³

et al. 2022

SSRN Journal

View full text Add to dashboard Cite

“…Experimental reports have assigned two possible compensation mechanism for CdSiO 3 structure: interstitial oxide ion and Cd-vacancy [12,28]. We can extend this possibility for other cadmium silicate structures taking account results presented in figures 3 and 4.…”

Section: Resultssupporting

confidence: 58%

“…The luminescent properties of the material are already widely studied from the experimental point of view, both for intrinsic luminescence and extrinsic luminescence, that is, when the material is doped (generally with trivalent rare Earth ions) [15,19,[26][27][28][29][30]. However, there is no consensus on the defects generated by the inclusion of R 3+ ions.…”

Section: Introductionmentioning

confidence: 99%

Effect of trivalent rare earth doping in cadmium silicates hosts: a theoretical study

Freire¹,

Santos²,

Bispo³

et al. 2022

Phys. Scr.

View full text Add to dashboard Cite

The objective of the present work is to investigate the possibilities for extrinsic defects in the three cadmium silicate matrices, CdSiO3, Cd2SiO4 and Cd3SiO5 and understand the final geometry of the most energetically favourable defects, which are generators of the luminescence centres in the material. This analysis will be performed out through classical and static computer modelling, using the code GULP. A number different mechanisms were modelled and their related solid state reactions were devised allowing the energetic calculations for the incorporation of trivalent rare earth ions(R3+) in these matrixes. The results demonstrated that the trivalent rare earth ions are preferentially incorporated substitutional at Cd sites with cadmium vacancy being created in order to compensate charge unbalance. Careful investigations of the different distances and angles between the ions involved in the defects formation for CdSiO3 found that all investigated R3+ ions have the same lower energetic defect configuration. The lowest energetic costs were found for a configuration where the rare earth ions and the accompanying vacancy are almost aligned with a distance of around 7Å and an angle closer to 180º. These results predict a possible set of two dipoles caused by the position of the cadmium vacancy in defect. Cadmium vacancies were expected to be present in the cadmium silicate due to the low vapor pressure of CdO; however, no previous work was able to pre-establish the final geometric structure of the cadmium silicate matrix in the defective region that can modify the luminescent centres in the material. The study of a wide range of possibilities for the insertion of defects and the proposal for the final configuration of these defects is presented, in order to assist in the identification of the sources and the specific chracteristics of the luminescent emissions presented in cadmium silicates doped with R3+.

show abstract

“…Studies have shown that when Eu 3+ is incorporated into a site without inversion symmetry, the transition of 5 D 0 → 7 F 2 should dominate. In contrast, 5 D 0 → 7 F 1 will dominate at sites with inversion symmetry [21–23] . The intensity ratio red to orange emission (R/O) (I 610nm /I 591nm ) of Eu 3+ : 5 D 0 → 7 F 2 to Eu 3+ : 5 D 0 → 7 F 1 can reflect the local field symmetry of the Eu 3+ site by the matrix [24] .…”

Section: Resultsmentioning

confidence: 99%

“…7 F 1 will dominate at sites with inversion symmetry. [21][22][23] The intensity ratio red to orange emission (R/O) (I 610nm /I 591nm ) of Eu 3 + : 5 D 0 ! 7 F 2 to Eu 3 + : 5 D 0 !…”

Section: The Effects Of Gdf 3 On Luminescent Properties and Cie Coord...mentioning

confidence: 99%

Enhanced Red Emission of Na₅Lu₉F₃₂: Eu³⁺ Single Crystal by Introducing of GdF₃

Zou,

Fang,

Zhou

et al. 2024

Eur J Inorg Chem

View full text Add to dashboard Cite

The bulk Na5Lu9F32 single crystals with high quality Serial Eu3+/Gd3+ co‐doped were grown by an ameliorative Bridgman technique. The measurement of X‐ray diffraction (XRD) and analysis of Rietveld refinement were implemented to validate the crystal phase. The Eu3+ doped Na5Lu9F32 single crystal emits intense red emission at 611 nm excited by 394 nm light. The intensity of 1.8 mol% Gd3+ doped sample is boosted by 3.56 times compared with the un‐doped one. The doping of Gd3+ ions replace competitively Lu3+ lattice sites with Eu3+ ions. Thus, they cause the lattice distortion and reduction of symmetry, enabling Eu3+ ions to overcome their 4f forbidden transitions. The change of Eu3+ ion local environment induced by Gd3+ ion doping was explored by the Eu3+ emission spectra and the variations of ratios between red and orange emission intensities (R/O). The fluorescence lifetime indicate that the introduction of GdF3 decrease the probability of non‐radiative transitions and increases the fluorescence lifetime. These results demonstrated that the Na5Lu9F32: Eu3+ single crystal doped with an appropriate concentration of GdF3 is a type of promising red emission single crystal for related optical devices of detectors and laser due to its strong red emission, high transparency and high physico‐chemical stability.

show abstract

CdSiO3:Eu3+ nanophosphor: one pot synthesis and enhancement of orange–red emission through Li+ co-doping

Cited by 11 publications

References 28 publications

Effect of Trivalent Rare Earth Doping in Cadmium Silicates Hosts: A Theoretical Study

Effect of Trivalent Rare Earth Doping in Cadmium Silicates Hosts: A Theoretical Study

Effect of trivalent rare earth doping in cadmium silicates hosts: a theoretical study

Enhanced Red Emission of Na₅Lu₉F₃₂: Eu³⁺ Single Crystal by Introducing of GdF₃

Contact Info

Product

Resources

About

CdSiO3:Eu3+ nanophosphor: one pot synthesis and enhancement of orange–red emission through Li+ co-doping

Cited by 11 publications

References 28 publications

Effect of Trivalent Rare Earth Doping in Cadmium Silicates Hosts: A Theoretical Study

Effect of Trivalent Rare Earth Doping in Cadmium Silicates Hosts: A Theoretical Study

Effect of trivalent rare earth doping in cadmium silicates hosts: a theoretical study

Enhanced Red Emission of Na5Lu9F32: Eu3+ Single Crystal by Introducing of GdF3

Contact Info

Product

Resources

About

Enhanced Red Emission of Na₅Lu₉F₃₂: Eu³⁺ Single Crystal by Introducing of GdF₃