TY - JOUR
T1 - Reducing particle size of persistent luminescent SrAl2O4
T2 - Eu2+,Dy3+ via microwave-assisted, reverse micelle synthesis
AU - Finley, Erin
AU - Paterson, Andrew S.
AU - Cobb, Angelica
AU - Willson, Richard C.
AU - Brgoch, Jakoah
N1 - Publisher Copyright:
© 2017 Optical Society of America.
PY - 2017
Y1 - 2017
N2 - The synthesis of persistent luminescent, monoclinic SrAl2O4:Eu2+,Dy3+ traditionally employs high temperature solid state methods, which tends to generate large particles and agglomerates (>15 μm). Alternatively, soft chemical synthetic routes are conducive to forming significantly smaller particles of SrAl2O4:Eu2+,Dy3+; unfortunately, many of the reported routes lead to impure products, including the presence of the hexagonal SrAl2O4:Eu2+,Dy3+ polymorph and Sr4Al14O25:Eu2+,Dy3+. Here, the combination of a solutionbased reverse micelle microemulusion synthesis route combined with rapid microwaveassisted heating is shown to produce nearly phase pure monoclinic SrAl2O4:Eu2+,Dy3+ with a ≈70% smaller equivalent spherical diameter (4.2 μm) compared to the all solid state prepared materials (14.3 μm). Optical characterization including photon excitation, photon emission, persistent luminescent lifetime, and thermoluminescence measurements support that the optical properties remain almost unchanged, regardless of synthetic route. These results validate that monoclinic SrAl2O4:Eu2+,Dy3+ produced using this pathway is viable as an alternative to the all solid state-prepared materials, with the added advantage of significantly smaller particles that may be desirable when architecting new potential applications.
AB - The synthesis of persistent luminescent, monoclinic SrAl2O4:Eu2+,Dy3+ traditionally employs high temperature solid state methods, which tends to generate large particles and agglomerates (>15 μm). Alternatively, soft chemical synthetic routes are conducive to forming significantly smaller particles of SrAl2O4:Eu2+,Dy3+; unfortunately, many of the reported routes lead to impure products, including the presence of the hexagonal SrAl2O4:Eu2+,Dy3+ polymorph and Sr4Al14O25:Eu2+,Dy3+. Here, the combination of a solutionbased reverse micelle microemulusion synthesis route combined with rapid microwaveassisted heating is shown to produce nearly phase pure monoclinic SrAl2O4:Eu2+,Dy3+ with a ≈70% smaller equivalent spherical diameter (4.2 μm) compared to the all solid state prepared materials (14.3 μm). Optical characterization including photon excitation, photon emission, persistent luminescent lifetime, and thermoluminescence measurements support that the optical properties remain almost unchanged, regardless of synthetic route. These results validate that monoclinic SrAl2O4:Eu2+,Dy3+ produced using this pathway is viable as an alternative to the all solid state-prepared materials, with the added advantage of significantly smaller particles that may be desirable when architecting new potential applications.
KW - Characterization
KW - Dysprosium
KW - Luminescence
KW - Micelles
KW - Optical properties
KW - Photons
KW - High temperature solid state methods
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U2 - 10.1364/OME.7.002597
DO - 10.1364/OME.7.002597
M3 - Article
AN - SCOPUS:85021652497
SN - 2159-3930
VL - 7
SP - 2597
EP - 2616
JO - Optical Materials Express
JF - Optical Materials Express
IS - 7
ER -