TY - JOUR
T1 - Sol-gel synthesis of Eu 3+, Tb 3+ co-doped Y 20 3 scintillating nanopowders
AU - De Jesús Carrillo Romo, Felipe
AU - De Jesús Morales Ramírez, Ángel
AU - Murillo, Antonieta García
AU - Hernández, Margarita García
AU - Vigueras, David Jaramillo
AU - Febles, Vicente Garibay
PY - 2012
Y1 - 2012
N2 - Y 2O 3:Eu 3+, Tb 3+ nanopowders were prepared via the sol- gel process, using yttrium pentadionate, europium, terbium nitrates, and ethanol as precursors. After the sol evaporation at 100 °C, the formed gel was annealed from 300 to 900 °C for 15min, and the obtained nanopowders were analyzed by X-ray diffraction to characterize the microstructural behavior and the crystalline structure, which was determined as mainly cubic. The crystallite size varies from 8.6 to 30.9 nm, at 500 and 900 °C, respectively. Transmission electron microscopy studies were carried out in order to analyze the microstructure and the size of crystallites. Three different Tb 3+ atomic contents (0.005, 0.075, and 0.01 at.%) were used at a fixed Eu 3+ level (2.5 at.%) with the aim of determining the relationship between the co-doping content and the scintillation intensity of the well-known 5D 0→ 7F 2 europium emission band at 611 nm. The results show that at higher Tb 3+ contents, a quenching process occurs between Eu 3+ and Tb 3+; however, even with the lowest Tb 3+ content (0.005 at.%), an increment on the scintillation light yield is observed compared with a Eu 3+ monodoped sample.
AB - Y 2O 3:Eu 3+, Tb 3+ nanopowders were prepared via the sol- gel process, using yttrium pentadionate, europium, terbium nitrates, and ethanol as precursors. After the sol evaporation at 100 °C, the formed gel was annealed from 300 to 900 °C for 15min, and the obtained nanopowders were analyzed by X-ray diffraction to characterize the microstructural behavior and the crystalline structure, which was determined as mainly cubic. The crystallite size varies from 8.6 to 30.9 nm, at 500 and 900 °C, respectively. Transmission electron microscopy studies were carried out in order to analyze the microstructure and the size of crystallites. Three different Tb 3+ atomic contents (0.005, 0.075, and 0.01 at.%) were used at a fixed Eu 3+ level (2.5 at.%) with the aim of determining the relationship between the co-doping content and the scintillation intensity of the well-known 5D 0→ 7F 2 europium emission band at 611 nm. The results show that at higher Tb 3+ contents, a quenching process occurs between Eu 3+ and Tb 3+; however, even with the lowest Tb 3+ content (0.005 at.%), an increment on the scintillation light yield is observed compared with a Eu 3+ monodoped sample.
KW - Co-d|oping
KW - Eu - Tb
KW - Scintillation properties
KW - Sol-gel
KW - Y O
UR - http://www.scopus.com/inward/record.url?scp=84867495892&partnerID=8YFLogxK
U2 - 10.3139/146.110761
DO - 10.3139/146.110761
M3 - Artículo
SN - 1862-5282
VL - 103
SP - 1244
EP - 1250
JO - International Journal of Materials Research
JF - International Journal of Materials Research
IS - 10
ER -