A Novel 3D Architecture
of GdPO<sub>4</sub> Nanophosphors:
Multicolored and White Light Emission
Ana I. Becerro
Sonia Rodríguez-Liviano
Alberto J. Fernández-Carrión
Manuel Ocaña
10.1021/cg301023k.s001
https://acs.figshare.com/articles/journal_contribution/A_Novel_3D_Architecture_of_GdPO_sub_4_sub_Nanophosphors_Multicolored_and_White_Light_Emission/2445748
Homogeneous monoclinic GdPO<sub>4</sub> particles composed
of three
intersecting lance-shaped crystals forming a penetration twin have
been synthesized following a very restrictive, simple, and fast (10
min) method consisting of the hydrothermal reaction of gadolinium
acetylacetonate with H<sub>3</sub>PO<sub>4</sub> in a mixture of ethylene
glycol and water at 180 °C. Slightly increasing the amount of
water in the solvent mixture leads to hexagonal rodlike GdPO<sub>4</sub>·0.5H<sub>2</sub>O nanoparticles, whereas the variation of the
Gd source, PO<sub>4</sub> source, aging temperature, and polyol type
gave rise to heterogeneous particles. The synthesis procedure is also
suitable for the preparation of Eu<sup>3+</sup>-, Tb<sup>3+</sup>-,
and Dy<sup>3+</sup>-doped GdPO<sub>4</sub> particles with the same
morphology and crystalline structure as the undoped materials. The
effect of the doping level on the luminescent properties of the twinlike
nanophosphors was evaluated, finding optimum doping levels of 5, 5,
and 1% for the Eu<sup>3+</sup>-, Tb<sup>3+</sup>-, and Dy<sup>3+</sup>-doped materials, respectively. The twinlike GdPO<sub>4</sub> nanophosphors
were found to be more efficient than the rodlike GdPO<sub>4</sub> ones
in terms of emission intensity. Finally, a solid-state single-phase
white-light-emitting nanophosphor has been fabricated for the first
time in this system by triply doping the GdPO<sub>4</sub> twined particles
with appropriate concentrations of Eu<sup>3+</sup>, Tb<sup>3+</sup>, and Dy<sup>3+</sup> and exciting through the Gd–Ln energy-transfer
band at 273 nm. In addition to this energy transfer band, other energy
charge transfer processes among the three dopants (Eu<sup>3+</sup>, Tb<sup>3+</sup>, and Dy<sup>3+</sup>) have been observed in the
triply doped material.
2013-02-06 00:00:00
triply doping
energy transfer band
rodlike GdPO 4 ones
twinlike GdPO 4 nanophosphors
doping level
energy charge transfer processes
Novel 3 D Architecture
gadolinium acetylacetonate
ethylene glycol
GdPO 4 particles
GdPO 4 Nanophosphors
hydrothermal reaction
doping levels
273 nm
Eu
H 3PO
synthesis procedure
twinlike nanophosphors
emission intensity
undoped materials
Gd source
Tb
polyol type
Dy
White Light EmissionHomogeneous
PO 4 source
GdPO 4