TY - JOUR
T1 - Luminescent properties of Y(OH)3
T2 - Tb nanopowders synthesized by microwave-assisted hydrothermal method
AU - Garduño-Wilches, I. A.
AU - Alarcón-Flores, G.
AU - Carmona-Téllez, S.
AU - Guzmán, J.
AU - Aguilar-Frutis, M.
N1 - Publisher Copyright:
© 2019, Springer Nature B.V.
PY - 2019/5/1
Y1 - 2019/5/1
N2 - In the present work, terbium-doped yttrium hydroxide was successfully synthesized by the microwave-assisted hydrothermal method using yttrium nitrate, terbium chloride, and lithium hydroxide as precursors; the study is based on samples with different terbium concentrations. X-ray diffraction indicates a pure hexagonal structure corresponding with the Y(OH)3 structure, as well as a preferential growth along (110) planes for the Tb-doped samples. FTIR confirms the presence of Y–OH bonds and no adsorbed nitrogen or N–O bonds. SEM images indicate the formation of rods smaller than 1 μm in length and diameters ranging from 80 to 55 nm while TEM images confirm the presence of large areas corresponding to (110) planes. The sample doped at 4 at.% presented the maximum photoluminescent intensity, though the sample doped at 2 at.% presented the highest values of quantum yield (23.5%). Quantum yield values decay with terbium concentration to a value of 7.89% for the 10 at.% concentration, such changes are attributed to a quenching effect and to differences in the photon-extraction efficiency. Photoluminescence decay time values decrease monotonically from 1.133 for the 2 at.% sample to 0.453 ms for the sample doped at 10 at.%, such behavior is attributed to a self-stimulated emission.
AB - In the present work, terbium-doped yttrium hydroxide was successfully synthesized by the microwave-assisted hydrothermal method using yttrium nitrate, terbium chloride, and lithium hydroxide as precursors; the study is based on samples with different terbium concentrations. X-ray diffraction indicates a pure hexagonal structure corresponding with the Y(OH)3 structure, as well as a preferential growth along (110) planes for the Tb-doped samples. FTIR confirms the presence of Y–OH bonds and no adsorbed nitrogen or N–O bonds. SEM images indicate the formation of rods smaller than 1 μm in length and diameters ranging from 80 to 55 nm while TEM images confirm the presence of large areas corresponding to (110) planes. The sample doped at 4 at.% presented the maximum photoluminescent intensity, though the sample doped at 2 at.% presented the highest values of quantum yield (23.5%). Quantum yield values decay with terbium concentration to a value of 7.89% for the 10 at.% concentration, such changes are attributed to a quenching effect and to differences in the photon-extraction efficiency. Photoluminescence decay time values decrease monotonically from 1.133 for the 2 at.% sample to 0.453 ms for the sample doped at 10 at.%, such behavior is attributed to a self-stimulated emission.
KW - Crystal size
KW - Decay time
KW - Luminescent materials
KW - Microwave-assisted hydrothermal method
KW - Quantum yield
KW - Terbium doped
UR - http://www.scopus.com/inward/record.url?scp=85065922973&partnerID=8YFLogxK
U2 - 10.1007/s11051-019-4546-x
DO - 10.1007/s11051-019-4546-x
M3 - Artículo
AN - SCOPUS:85065922973
SN - 1388-0764
VL - 21
JO - Journal of Nanoparticle Research
JF - Journal of Nanoparticle Research
IS - 5
M1 - 96
ER -