Chuiko Institute Of Surface Chemistry Of Nas Of Ukraine 17 General Naumov Str Kyiv 03164 Ukraine

Ukraine

Chuiko Institute Of Surface Chemistry Of Nas Of Ukraine 17 General Naumov Str Kyiv 03164 Ukraine

Ukraine
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Ignatovych M.,Chuiko Institute Of Surface Chemistry Of Nas Of Ukraine 17 General Naumov Str Kyiv 03164 Ukraine | Borysenko M.,Chuiko Institute Of Surface Chemistry Of Nas Of Ukraine 17 General Naumov Str Kyiv 03164 Ukraine | Davydenko L.,Chuiko Institute Of Surface Chemistry Of Nas Of Ukraine 17 General Naumov Str Kyiv 03164 Ukraine | Borysenko L.,Chuiko Institute Of Surface Chemistry Of Nas Of Ukraine 17 General Naumov Str Kyiv 03164 Ukraine | And 3 more authors.
Materialwissenschaft und Werkstofftechnik | Year: 2016

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/SiO2 samples showed two intense and broad bands of charge-transfer (CT) character at 240 and 300 nm that were attributed to the O2- → Ce3+ and O2- → Ce4+ transitions, respectively. For Eu/SiO2 and CeEu/SiO2 samples, CT bands O2- → Eu3+ at 225 nm and non-resolved ones O2- → Ce3+ at 245 nm were registered, respectively. Photoluminescence spectra of Ce/SiO2 samples showed the presence of Ce3+ ions emitting in the range of 413-438 nm caused by the 5d-4f transition. Photoluminescence spectra of Eu/SiO2 and CeEu/SiO2 samples featured the characteristic orange-red emission arising from 5D0 → 7Fn manifolds (570-750 nm) of Eu3+ ions. The electric-dipole 5D0 → 7F2 transition at 615 nm dominated in the Eu/SiO2 samples while the magnetic-dipole transition 5D0 → 7F1 at 591 nm dominated in the CeEu/SiO2 double-doped samples. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim February 2016.

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