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@ARTICLE{Bartosiewicz:630952,
      author       = {Bartosiewicz, Karol and Smortsova, Yevheniia and Radmoski,
                      Piotr and Witkowski, Marcin E. and Drozdowski, Konrad J. and
                      Yoshino, Masao and Horiai, Takahiko and Szymański, Damian
                      and Dewo, Wioletta and Zeler, Justyna and Socha, Paweł and
                      Buryi, Maksym and Prokhorov, Andrey and John, David and
                      Volf, Jakub and Runka, Tomasz and Pędziński, Tomasz and
                      Hauza, Karol and Jarý, Vítězslav and Shoji, Yasuhiro and
                      Kamada, Kei and Zych, Eugeniusz and Drozdowski, Winicjusz
                      and Yoshikawa, Akira},
      title        = {{S}haping scintillation and {UV}-{VIS}-{NIR} luminescence
                      properties through synergistic lattice disordered
                      engineering and exciton-mediated energy transfer in
                      {P}r$^{3+}$ -doped {L}u$_{1.5}${Y}$_{1.5}$ {A}l$_{5−
                      x}${S}c$_{x}${O}$_{12}$ ( x = 0.0–2.0) garnets},
      journal      = {Journal of materials chemistry / C},
      volume       = {13},
      number       = {27},
      issn         = {2050-7526},
      address      = {London ˜[u.a.]œ},
      publisher    = {RSC},
      reportid     = {PUBDB-2025-01912},
      pages        = {13691 - 13712},
      year         = {2025},
      abstract     = {This study investigated the crystallization behavior,
                      luminescence and scintillation properties of Pr$^{3+}$-doped
                      Lu$_{1.5}$Y$_{1.5}$Al$_{5−x}$Sc$_x$O$_{12}$ (0.0, 0.5,
                      1.0, 1.5, 2.0) garnets, grown using the micro-pulling-down
                      method, to address challenges associated with the
                      substitution of Sc$^{3+}$ for Al$^{3+}$ ions due to their
                      mismatched ionic radii in the same octahedral
                      crystallographic site. A specially engineered crucible with
                      five independent crystallization capillaries was used, which
                      revealed that Sc$^{3+}$ substitution caused localized melt
                      heterogeneity, resulting in non-uniform melt ejection during
                      crystallization. The threshold of Sc$^{3+}$ ions
                      concentration (x = 1.5) was identified, beyond which further
                      substitution led to the formation of a garnet/bixbyite-like
                      distorted perovskite hypoeutectic structure. This discovered
                      a novel method for crystallization of hypoeutectic crystal
                      growth by exploiting ionic radii mismatches. Vibrational
                      spectroscopy confirmed that Sc3+ ions incorporation
                      disrupted lattice symmetry, increasing structural disorder
                      around Pr3+ ions. This structural modification significantly
                      enhanced luminescence, particularly in the visible and
                      near-infrared (NIR) ranges, achieving a sixteenfold increase
                      in NIR luminescence intensity. Synchrotron radiation
                      excitation spectra revealed that the band gap energy
                      progressively decreased with increasing Sc$^{3+}$ ions
                      concentration. This finding provided crucial insights for
                      designing materials based on band gap engineering
                      strategies. A sixfold improvement in scintillation light
                      yield, reaching 11 200 photons per MeV, was observed in
                      the Lu$_{1.5}$Y$_{1.5}$Al$_{3.5}$Sc$_{1.5}$O$_{12}$ crystal
                      (x = 1.5). The enhancement resulted from a
                      Sc$^{3+}$-mediated energy transfer pathway $(Sc_{e^- \to
                      h^-}$$^{3+}$$\to Pr^{3+})$, which optimized charge carrier
                      dynamics by reducing deep trapping center density by an
                      order of magnitude while preserving shallow traps. The EPR
                      spectroscopy showed that Sc$^{3+}$ incorporation reduced
                      concentration of trace impurities, enhancing scintillation
                      light yield. It also confirmed that F$^{+}$–Pr$^{3+}$
                      interactions intensified Pr$^{3+}$ emission at 370 nm and
                      identified the 410–420 nm band as originating from
                      F$^+$–O$^−$ defect pairs. These findings demonstrate
                      that controlled lattice modification through Sc$^{3+}$
                      incorporation allows for tuning structural and luminescent
                      properties, offering a new approach for the design of
                      advanced scintillators and luminescent materials with
                      improved performance for targeted applications.},
      cin          = {DOOR ; HAS-User / FS-PETRA-S},
      ddc          = {530},
      cid          = {I:(DE-H253)HAS-User-20120731 /
                      I:(DE-H253)FS-PETRA-S-20210408},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3) /
                      P4F - Physics For Future (101081515)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3 /
                      G:(EU-Grant)101081515},
      experiment   = {EXP:(DE-H253)P-P66-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1039/D5TC01411E},
      url          = {https://bib-pubdb1.desy.de/record/630952},
}