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@ARTICLE{Nedilko:620000,
      author       = {Nedilko, S. G. and Chukova, O. and Dorofieieva, A. and
                      Nedilko, S. A. and Shcherbatskyi, V. and Voitenko, T. and
                      Etter, M. and Mosafer, H. S. Rahimi and Paszkowicz, W. and
                      Zhydachevskyy, Y. and Suchocki, A.},
      title        = {{E}volution of phase composition and luminescent
                      characteristics of the
                      {L}a$_{1-x-y}${S}m$_x${C}a$_y${VO}$_{4-δ}$ nanocrystalline
                      phosphor},
      journal      = {Optical materials: X},
      volume       = {25},
      issn         = {2590-1478},
      address      = {Amsterdam},
      publisher    = {Elsevier},
      reportid     = {PUBDB-2024-08083},
      pages        = {100390},
      year         = {2025},
      abstract     = {This work aims to clarify the relationship between the
                      optical, particularly luminescent, characteristics of the
                      La$_{1-x-y}$Sm$_x$Ca$_y$VO$_{4-δ}$ 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 Sm$^{3+}$ 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
                      La$_{1-x-y}$Sm$_x$Ca$_y$VO$_{4-δ}$ nanoparticles consist of
                      both the wide UV wavelength band (260–360 nm) caused by
                      transition in the VO$_4$$^{3−}$ molecular groups and in a
                      set of narrow lines caused by inner $f$-$f$ transitions in
                      the Sm$^{3+}$ ions (spectral range 350–520 nm). The PL
                      spectra of the La$_{1-x-y}$Sm$_x$Ca$_y$VO$_{4-δ}$
                      nanoparticles contain four groups of lines (I – IV)
                      resulting from the $^4$G$_{5/2}$ → $^6$H$_{5/2}$,
                      $^6$H$_{7/2}$, $^6$H$_{9/2}$, and $^6$H$_{11/2}$
                      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 La$_{1-x-y}$Sm$_x$Ca$_y$VO$_{4-δ}$ samples.
                      It was found that the changes of the R$_{lum}$ =
                      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
                      La$_{1-x-y}$Sm$_x$Ca$_y$VO$_{4-δ}$ compounds. Developed in
                      this work the combined way of structural and optical data
                      analysis may be useful in designing other multiphase
                      phosphor systems containing Sm$^{3+}$ ions.},
      cin          = {DOOR ; HAS-User / FS-PETRA-D / FS-PETRA-S},
      ddc          = {530},
      cid          = {I:(DE-H253)HAS-User-20120731 /
                      I:(DE-H253)FS-PETRA-D-20210408 /
                      I:(DE-H253)FS-PETRA-S-20210408},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3) /
                      NEP - Nanoscience Foundries and Fine Analysis - Europe|PILOT
                      (101007417) / MSCA4Ukraine - MSCA4Ukraine (101101923)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3 /
                      G:(EU-Grant)101007417 / G:(EU-Grant)101101923},
      experiment   = {EXP:(DE-H253)P-P02.1-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1016/j.omx.2024.100390},
      url          = {https://bib-pubdb1.desy.de/record/620000},
}