X-ray luminescence of diamond composite films containing yttrium-aluminum garnet nanoparticles with varied composition of Sc–Ce doping

Cerium-doped gadolinium-scandium-aluminum garnet powders: synthesis and use in X-ray luminescent diamond composites

“…The common trend for GD2, GD8, GD12, and GD21 samples were the fact that the increase in scandium content results in decreasing XRL intensity. This phenomenon was in accordance with the results seen previously [6] for the garnets, yttrium-aluminum and yttrium-scandium-aluminum, doped with cerium. The highest intensity of XRL among all the studied compositions was registered for Gd2.73Ce0.02Sc0.5Al4.75O12 composition (GD2).…”

“…5. The main feature for all the samples was an intense peak at ~575 nm, which is attributed to 5d 4f transition in Ce 3+ ions [6,7]. The XRL intensities for different compositions are summarized in Table 1.…”

“…It is based on the introduction of luminescent rare-earth microand nanoparticles into a transparent diamond matrix. Such diamond composites with Eu(III) tri-(2,6-pyridine dicarboxylic acid [1], EuF3 [2], HoF3 [3], CeF3 [4], β-NaGdF4:Eu [5], YSAG:Ce and YAG:Ce [6,7] already have shown intense electro-, photo-and X-ray luminescence (XRL).…”

“…The developed composites are promising for use as electroluminescent films [3,4], visualizers and scintillators of high-intensity X-ray radiation in free-electron lasers (XFELs) and synchrotrons [7,8]. For efficient use in high-power XFEL-type devices, nanosecond decay time and luminescence in the visible range are highly desirable, which was achieved in our previous works on the basis of diamond-based composites with cerium-doped yttrium-aluminum (YAG:Ce) and yttrium-scandium-aluminum garnets (YSAG:Ce) [6,7]. In a previous study [6] by the authors, for both YAG:Ce and YSAG:Ce, the concentration-temperature limits of the existence of single-phase solid solutions were determined.…”

“…For efficient use in high-power XFEL-type devices, nanosecond decay time and luminescence in the visible range are highly desirable, which was achieved in our previous works on the basis of diamond-based composites with cerium-doped yttrium-aluminum (YAG:Ce) and yttrium-scandium-aluminum garnets (YSAG:Ce) [6,7]. In a previous study [6] by the authors, for both YAG:Ce and YSAG:Ce, the concentration-temperature limits of the existence of single-phase solid solutions were determined. The composition [Y2.98Ce0.02]{Al2}Al3O12, showed the highest XRL intensity among all tested samples.…”