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Cerium and europium nanospecies in quartz glass: synthesis and spectral study
Author(s) -
Ignatovych M.,
Borysenko M.,
Davydenko L.,
Borysenko L.,
Veres M.,
Himics L.,
Koos M.
Publication year - 2016
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201600475
Subject(s) - europium , cerium , quartz , materials science , mineralogy , analytical chemistry (journal) , nuclear chemistry , chemistry , chemical engineering , environmental chemistry , metallurgy , luminescence , engineering , optoelectronics
Quartz glass doped with cerium (0.02–0.36 wt%) and europium (0.01–0.04 wt%) nanoparticles were prepared by a modified sol‐gel method. Ultraviolet‐visible optical absorption and steady‐state photoluminescence excitation‐emission techniques were applied for spectral characterization of samples. Absorption spectra for Ce/SiO 2 samples showed two intense and broad bands of charge‐transfer (CT) character at 240 and 300 nm that were attributed to the O 2– → Ce 3+ and O 2– → Ce 4+ transitions, respectively. For Eu/SiO 2 and CeEu/SiO 2 samples, CT bands O 2– → Eu 3+ at 225 nm and non‐resolved ones O 2– → Ce 3+ at 245 nm were registered, respectively. Photoluminescence spectra of Ce/SiO 2 samples showed the presence of Ce 3+ ions emitting in the range of 413–438 nm caused by the 5d–4f transition. Photoluminescence spectra of Eu/SiO 2 and CeEu/SiO 2 samples featured the characteristic orange‐red emission arising from 5 D 0 → 7 F n manifolds (570–750 nm) of Eu 3+ ions. The electric‐dipole 5 D 0 → 7 F 2 transition at 615 nm dominated in the Eu/SiO 2 samples while the magnetic‐dipole transition 5 D 0 → 7 F 1 at 591 nm dominated in the CeEu/SiO 2 double‐doped samples.