Evolution of phase composition and luminescent characteristics of the La1-x-ySmxCayVO4-δ nanocrystalline phosphor
This work aims to clarify the relationship between the optical, particularly luminescent, characteristics of the La1-x-ySmxCayVO4-δ powder nanosized compounds with their phase composition and concentration of dopants. According to the high-accuracy XRD data, the samples are a mixture of monoclinic a...
Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-02-01
|
| Series: | Optical Materials: X |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590147824001025 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1825199423335956480 |
|---|---|
| author | S.G. Nedilko O. Chukova A. Dorofieieva S.A. Nedilko V. Shcherbatskyi T. Voitenko M. Etter H.S. Rahimi Mosafer W. Paszkowicz Y. Zhydachevskyy A. Suchocki |
| author_facet | S.G. Nedilko O. Chukova A. Dorofieieva S.A. Nedilko V. Shcherbatskyi T. Voitenko M. Etter H.S. Rahimi Mosafer W. Paszkowicz Y. Zhydachevskyy A. Suchocki |
| author_sort | S.G. Nedilko |
| collection | DOAJ |
| description | This work aims to clarify the relationship between the optical, particularly luminescent, characteristics of the La1-x-ySmxCayVO4-δ powder nanosized compounds with their phase composition and concentration of dopants. According to the high-accuracy XRD data, the samples are a mixture of monoclinic and tetragonal crystal phases. The diffuse reflection and photoluminescence (PL) spectra were measured and analyzed including spectral distributions and intensity ratios of the PL bands, the positions and half-widths of envelopes of the groups of lines in the PL spectra of Sm3+ ions. Estimated from the diffuse reflection data the band gap values are 3.85, and 3.82, 3.75, 3.78 eV for the samples with x = 0.1, y = 0, and (x, y) = 0.05, 0.10, 0.15, respectively. The PL excitation spectra of the La1-x-ySmxCayVO4-δ nanoparticles consist of both the wide UV wavelength band (260–360 nm) caused by transition in the VO43− molecular groups and in a set of narrow lines caused by inner f-f transitions in the Sm3+ ions (spectral range 350–520 nm). The PL spectra of the La1-x-ySmxCayVO4-δ nanoparticles contain four groups of lines (I – IV) resulting from the 4G5/2 → 6H5/2, 6H7/2, 6H9/2, and 6H11/2 transitions, respectively, in the inner f shell of the Sm3+ ions. The concentration behavior of the Sm3+ ions PL characteristics is related to the evaluation of the phase composition of La1-x-ySmxCayVO4-δ samples. It was found that the changes of the Rlum = I(III)/I(I), where I(III) and I(I) are the integrated intensities of the corresponding groups of lines, can be related to the phase composition of the La1-x-ySmxCayVO4-δ compounds. Developed in this work the combined way of structural and optical data analysis may be useful in designing other multiphase phosphor systems containing Sm3+ ions. |
| format | Article |
| id | doaj-art-718edea95ea84fa3b0f4f126430a4a7e |
| institution | Kabale University |
| issn | 2590-1478 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Optical Materials: X |
| spelling | doaj-art-718edea95ea84fa3b0f4f126430a4a7e2025-02-08T05:01:03ZengElsevierOptical Materials: X2590-14782025-02-0125100390Evolution of phase composition and luminescent characteristics of the La1-x-ySmxCayVO4-δ nanocrystalline phosphorS.G. Nedilko0O. Chukova1A. Dorofieieva2S.A. Nedilko3V. Shcherbatskyi4T. Voitenko5M. Etter6H.S. Rahimi Mosafer7W. Paszkowicz8Y. Zhydachevskyy9A. Suchocki10Taras Shevchenko National University of Kyiv, Volodymyrska Str., 64/13, Kyiv, 01601, Ukraine; Corresponding author.Taras Shevchenko National University of Kyiv, Volodymyrska Str., 64/13, Kyiv, 01601, Ukraine; Deutsches Elektronen-Synchrotron (DESY), Notkestr. 85, Hamburg, 22607, GermanyTaras Shevchenko National University of Kyiv, Volodymyrska Str., 64/13, Kyiv, 01601, UkraineTaras Shevchenko National University of Kyiv, Volodymyrska Str., 64/13, Kyiv, 01601, UkraineTaras Shevchenko National University of Kyiv, Volodymyrska Str., 64/13, Kyiv, 01601, UkraineTaras Shevchenko National University of Kyiv, Volodymyrska Str., 64/13, Kyiv, 01601, UkraineDeutsches Elektronen-Synchrotron (DESY), Notkestr. 85, Hamburg, 22607, GermanyInstitute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, Warsaw, 02-668, PolandInstitute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, Warsaw, 02-668, PolandInstitute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, Warsaw, 02-668, PolandInstitute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, Warsaw, 02-668, PolandThis work aims to clarify the relationship between the optical, particularly luminescent, characteristics of the La1-x-ySmxCayVO4-δ powder nanosized compounds with their phase composition and concentration of dopants. According to the high-accuracy XRD data, the samples are a mixture of monoclinic and tetragonal crystal phases. The diffuse reflection and photoluminescence (PL) spectra were measured and analyzed including spectral distributions and intensity ratios of the PL bands, the positions and half-widths of envelopes of the groups of lines in the PL spectra of Sm3+ ions. Estimated from the diffuse reflection data the band gap values are 3.85, and 3.82, 3.75, 3.78 eV for the samples with x = 0.1, y = 0, and (x, y) = 0.05, 0.10, 0.15, respectively. The PL excitation spectra of the La1-x-ySmxCayVO4-δ nanoparticles consist of both the wide UV wavelength band (260–360 nm) caused by transition in the VO43− molecular groups and in a set of narrow lines caused by inner f-f transitions in the Sm3+ ions (spectral range 350–520 nm). The PL spectra of the La1-x-ySmxCayVO4-δ nanoparticles contain four groups of lines (I – IV) resulting from the 4G5/2 → 6H5/2, 6H7/2, 6H9/2, and 6H11/2 transitions, respectively, in the inner f shell of the Sm3+ ions. The concentration behavior of the Sm3+ ions PL characteristics is related to the evaluation of the phase composition of La1-x-ySmxCayVO4-δ samples. It was found that the changes of the Rlum = I(III)/I(I), where I(III) and I(I) are the integrated intensities of the corresponding groups of lines, can be related to the phase composition of the La1-x-ySmxCayVO4-δ compounds. Developed in this work the combined way of structural and optical data analysis may be useful in designing other multiphase phosphor systems containing Sm3+ ions.http://www.sciencedirect.com/science/article/pii/S2590147824001025Lanthanum vanadatePhase compositionCrystal structureLuminescenceSm3+ ions |
| spellingShingle | S.G. Nedilko O. Chukova A. Dorofieieva S.A. Nedilko V. Shcherbatskyi T. Voitenko M. Etter H.S. Rahimi Mosafer W. Paszkowicz Y. Zhydachevskyy A. Suchocki Evolution of phase composition and luminescent characteristics of the La1-x-ySmxCayVO4-δ nanocrystalline phosphor Optical Materials: X Lanthanum vanadate Phase composition Crystal structure Luminescence Sm3+ ions |
| title | Evolution of phase composition and luminescent characteristics of the La1-x-ySmxCayVO4-δ nanocrystalline phosphor |
| title_full | Evolution of phase composition and luminescent characteristics of the La1-x-ySmxCayVO4-δ nanocrystalline phosphor |
| title_fullStr | Evolution of phase composition and luminescent characteristics of the La1-x-ySmxCayVO4-δ nanocrystalline phosphor |
| title_full_unstemmed | Evolution of phase composition and luminescent characteristics of the La1-x-ySmxCayVO4-δ nanocrystalline phosphor |
| title_short | Evolution of phase composition and luminescent characteristics of the La1-x-ySmxCayVO4-δ nanocrystalline phosphor |
| title_sort | evolution of phase composition and luminescent characteristics of the la1 x ysmxcayvo4 δ nanocrystalline phosphor |
| topic | Lanthanum vanadate Phase composition Crystal structure Luminescence Sm3+ ions |
| url | http://www.sciencedirect.com/science/article/pii/S2590147824001025 |
| work_keys_str_mv | AT sgnedilko evolutionofphasecompositionandluminescentcharacteristicsofthela1xysmxcayvo4dnanocrystallinephosphor AT ochukova evolutionofphasecompositionandluminescentcharacteristicsofthela1xysmxcayvo4dnanocrystallinephosphor AT adorofieieva evolutionofphasecompositionandluminescentcharacteristicsofthela1xysmxcayvo4dnanocrystallinephosphor AT sanedilko evolutionofphasecompositionandluminescentcharacteristicsofthela1xysmxcayvo4dnanocrystallinephosphor AT vshcherbatskyi evolutionofphasecompositionandluminescentcharacteristicsofthela1xysmxcayvo4dnanocrystallinephosphor AT tvoitenko evolutionofphasecompositionandluminescentcharacteristicsofthela1xysmxcayvo4dnanocrystallinephosphor AT metter evolutionofphasecompositionandluminescentcharacteristicsofthela1xysmxcayvo4dnanocrystallinephosphor AT hsrahimimosafer evolutionofphasecompositionandluminescentcharacteristicsofthela1xysmxcayvo4dnanocrystallinephosphor AT wpaszkowicz evolutionofphasecompositionandluminescentcharacteristicsofthela1xysmxcayvo4dnanocrystallinephosphor AT yzhydachevskyy evolutionofphasecompositionandluminescentcharacteristicsofthela1xysmxcayvo4dnanocrystallinephosphor AT asuchocki evolutionofphasecompositionandluminescentcharacteristicsofthela1xysmxcayvo4dnanocrystallinephosphor |