TY - JOUR
T1 - Luminescent aerogels of Gd2O3:Eu3+ and Gd2O3:(Eu3+, Tb3+)
AU - García Ramírez, Victor M.
AU - García Murillo, Antonieta
AU - Carrillo Romo, Felipe de J.
AU - Cervantes Tobón, Arturo
AU - Cayetano Castro, Nicolás
N1 - Publisher Copyright:
© 2023, Indian Academy of Sciences.
PY - 2023/6
Y1 - 2023/6
N2 - This study reports on the fabrication and characterization of luminescent aerogels of Gd2O3:Eu3+ and Gd2O3:(Eu3+, Tb3+), synthetized by the sol–gel method and the supercritical drying technique. The mol% concentration of the Eu3+ and Tb3+ ions in the synthesis were varied to study the effects of concentration on the luminescent properties of the aerogels. The results show that the Gd2O3:Eu3+ and the Gd2O3:(Eu3+, Tb3+) aerogels exhibited a maximum emission at λ = 613 nm. For all the samples, a decay in light intensity occurred when a concentration of 8 mol% of Eu3+ was exceeded, regardless of whether the Tb3+ ion was present. The analysis by X-ray diffraction showed that the aerogels of Gd2O3:Eu3+, like those of Gd2O3:(Eu3+, Tb3+), had a cubic crystalline structure with no change even at high concentrations of Eu3+. The microscopy analyses showed that the aerogels present a porous structure made up of interconnected quasi-spherical nanoparticles that formed a three-dimensional network. Quantum yield analysis shows that Tb3+ acts as a sensitizer of Eu3+, increasing the light intensity in the aerogels. The results reveal that it is possible to manufacture luminescent aerogels of rare-earth oxides that can be used in opto-electronic devices.
AB - This study reports on the fabrication and characterization of luminescent aerogels of Gd2O3:Eu3+ and Gd2O3:(Eu3+, Tb3+), synthetized by the sol–gel method and the supercritical drying technique. The mol% concentration of the Eu3+ and Tb3+ ions in the synthesis were varied to study the effects of concentration on the luminescent properties of the aerogels. The results show that the Gd2O3:Eu3+ and the Gd2O3:(Eu3+, Tb3+) aerogels exhibited a maximum emission at λ = 613 nm. For all the samples, a decay in light intensity occurred when a concentration of 8 mol% of Eu3+ was exceeded, regardless of whether the Tb3+ ion was present. The analysis by X-ray diffraction showed that the aerogels of Gd2O3:Eu3+, like those of Gd2O3:(Eu3+, Tb3+), had a cubic crystalline structure with no change even at high concentrations of Eu3+. The microscopy analyses showed that the aerogels present a porous structure made up of interconnected quasi-spherical nanoparticles that formed a three-dimensional network. Quantum yield analysis shows that Tb3+ acts as a sensitizer of Eu3+, increasing the light intensity in the aerogels. The results reveal that it is possible to manufacture luminescent aerogels of rare-earth oxides that can be used in opto-electronic devices.
KW - Aerogels
KW - EuO
KW - GdO
KW - luminescence
KW - sol–gel
UR - http://www.scopus.com/inward/record.url?scp=85153324930&partnerID=8YFLogxK
U2 - 10.1007/s12034-023-02906-6
DO - 10.1007/s12034-023-02906-6
M3 - Artículo
AN - SCOPUS:85153324930
SN - 0250-4707
VL - 46
JO - Bulletin of Materials Science
JF - Bulletin of Materials Science
IS - 2
M1 - 75
ER -