Spectral and Cathodoluminescence Decay Characteristics of the Ba<sub>1−x</sub>Ce<sub>x</sub>F<sub>2+x</sub> (x = 0.3–0.4) Solid Solution Synthesized by Precipitation from Aqueous Solutions and Fusion
Sergey V. Kuznetsov,
Darya S. Yasyrkina,
Damir T. Valiev,
Sergey A. Stepanov,
Alexander A. Alexandrov,
Sergey Kh. Batygov,
Valeriy V. Voronov,
Vasilii A. Konyushkin,
Andrey N. Nakladov,
Julia A. Ermakova,
Pavel P. Fedorov
Affiliations
Sergey V. Kuznetsov
Prokhorov General Physics Institute of the Russian Academy of Sciences, Laser Materials and Technology Research Center, Nanotechnology Department, 119991 Moscow, Russia
Darya S. Yasyrkina
Prokhorov General Physics Institute of the Russian Academy of Sciences, Laser Materials and Technology Research Center, Nanotechnology Department, 119991 Moscow, Russia
Damir T. Valiev
Materials Science Department, Tomsk Polytechnic University, 634050 Tomsk, Russia
Sergey A. Stepanov
Materials Science Department, Tomsk Polytechnic University, 634050 Tomsk, Russia
Alexander A. Alexandrov
Prokhorov General Physics Institute of the Russian Academy of Sciences, Laser Materials and Technology Research Center, Nanotechnology Department, 119991 Moscow, Russia
Sergey Kh. Batygov
Prokhorov General Physics Institute of the Russian Academy of Sciences, Laser Materials and Technology Research Center, Nanotechnology Department, 119991 Moscow, Russia
Valeriy V. Voronov
Prokhorov General Physics Institute of the Russian Academy of Sciences, Laser Materials and Technology Research Center, Nanotechnology Department, 119991 Moscow, Russia
Vasilii A. Konyushkin
Prokhorov General Physics Institute of the Russian Academy of Sciences, Laser Materials and Technology Research Center, Nanotechnology Department, 119991 Moscow, Russia
Andrey N. Nakladov
Prokhorov General Physics Institute of the Russian Academy of Sciences, Laser Materials and Technology Research Center, Nanotechnology Department, 119991 Moscow, Russia
Julia A. Ermakova
Prokhorov General Physics Institute of the Russian Academy of Sciences, Laser Materials and Technology Research Center, Nanotechnology Department, 119991 Moscow, Russia
Pavel P. Fedorov
Prokhorov General Physics Institute of the Russian Academy of Sciences, Laser Materials and Technology Research Center, Nanotechnology Department, 119991 Moscow, Russia
Single-phase samples of the Ba1−xCexF2+x solid solution (x = 0.3–0.4) were synthesized by directional crystallization in the form of single crystals and by co-precipitation from aqueous nitrate solutions using potassium fluoride as a fluorinating agent in the form of nanopowders. The cathodoluminescence of the pressed powder samples was studied in comparison with the BaF2: Ce single crystals in 250–460 nm (2.7–5 eV) spectral range upon excitation by an electron accelerator. The cathodoluminescence spectra of the samples revealed a wide band in the range of 3.0–4.0 eV, which consists of two typical components of Ce3+ with decay time 23 ns in the case of single crystals and three decay times 27 ns, 140–170 ns, and ~600 ns in the case of pressed powders. The decay time of the short-wavelength component (27 ns) in the case of pressed powders is close to the lifetime of the excited state of the Ce3+ ion. The developed X-ray phosphors can be applied for embedding in diamonds for diamond–nanoparticle composite preparation.
