Photoluminescence and optical properties of Eu3+/Eu2+-doped transparent Al2O3 ceramics

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F21%3APU140876" target="_blank" >RIV/00216305:26620/21:PU140876 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0955221921001783" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0955221921001783</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2021.03.029" target="_blank" >10.1016/j.jeurceramsoc.2021.03.029</a>

Result language
angličtina
Original language name
Photoluminescence and optical properties of Eu3+/Eu2+-doped transparent Al2O3 ceramics
Original language description
Transparent Eu3+-doped (0.05–0.15 at. %) alumina ceramics with fine-grained microstructure were prepared and studied in terms of optical properties and photoluminescence (PL). The light transmission through ceramics up to dopant concentrations 0.125 at. % is dominated by birefringence scattering at grain boundaries. As confirmed by HRTEM/EDS element mapping, high photoluminescence intensity was achieved as the result of the dopant segregation at grain boundaries. The PL emission spectra of Al2O3:Eu3+ ceramics exhibited red light emissions with the highest intensity (394 nm excitation) for material containing 0.125 at. % of Eu3+. The luminescence decay was single-exponential with a lifetime ∼1.5 ms. The post-sintering reduction of Eu3+→Eu2+ under an H2 atmosphere (at 1300 °C) was difficult. Two simultaneously coexisting Eu2+ emitting PL centers were identified, one emitting blue light with average decay constant of 150 ns, and the other green light (more intense) with average decay constant of 1.3 μs.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20504 - Ceramics

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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