Details

Autor(en) / Beteiligte

• Ishchenko, А.V.
• Zuev, M.G.
• Vasin, A.A.
• Yagodin, V.V.
• Viktorov, L.V.
• Shulgin, B.V.

Titel

Synthesis and luminescent properties of Sr2Gd6.8Eu1.2Si6(1−x)P6xO26 oxyapatites

Ist Teil von

• Journal of luminescence, 2016-01, Vol.169, p.137-142

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2016

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The solid solutions Sr2Gd6.8Eu1.2Si6(1−x)P6xO26−δ (where x=0–0.15 and δ is oxygen nonstoichiometry) were synthesized. The structural properties of the crystal lattice of the solid solutions and the peculiarities of Eu3+ and P5+ dopants substitution for matrix ions have been considered. The photo-, X-ray and pulsed cathode luminescence properties have been studied. It has been found that substitution of (SiO4)4− by (PO4)3− tetrahedron in Eu3+-doped oxyapatites does not bring significant changes to bands structure Eu3+ in luminescence spectra under different excitation (UV, X-ray, pulse cathode beam). However, the increase of P5+ concentration in Sr2Gd6.8Eu1.2Si6(1−x)P6xO26–δ compounds leads to a decrease of integral intensity of Eu3+ luminescence bands due to local environment symmetry modifications and covalency degree changes. Two nonequivalent optical Eu3+ centers have been found. These compounds are of interest for efficient X-ray phosphors, display devices and LED engineering material creation. •The luminescence properties were studied upon UV, X-ray and pulse cathode beam.•P5+ doping of Sr2Gd6.8Eu1.2Si6O26 leads to luminescence intensity reduction.•At least two types of optical centers formed by Eu3+ ions were found.•The structural features of Sr2Gd6.8Eu1.2Si6(1−x)P6xO26 were reported.•Partial replacement of Si by P does not change the Sr2Gd6.8Eu1.2Si6O26 structure.