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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of the European Ceramic Society

ISSN

0955-2219

e-ISSN

1873-619X

Svazek periodika

41

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

4896-4906

Kód UT WoS článku

000640703200002

EID výsledku v databázi Scopus

2-s2.0-85103504399