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May 20-21, 2019 | Vienna, Austria
Biomaterials and Nanomaterials &
Materials Physics and Materials Science
2
nd
International Conference on
Journal of Materials Science and Nanotechnology | Volume 3
Strontium Aluminate based aerogel phosphors for the enhanced afterglow properties
Gaganpreet Kaur Behrh
ETH Zurich, Switzerland
O
wing to the excellent afterglow properties of
SrAl2O4:Eu2+Dy3+, there have been several efforts
put into the synthesis of this material. Conventionally,
this was synthesized via solid state method to obtain bulk
scale materials. Recently, nanoscale-based Strontium
Aluminates have also grabbed the attention of many
researchers. This is due to the size induced changes in
the structural, optical and electrical properties of the
nanophosphors. However, there is some controversy in
the literature with the context of phosphorescence for
this material. Some of the groups strongly believe that
the afterglow enhances for the nanoscale materials in
comparison to the bulk ones due to the confinement of
most activators at the surface and enhanced trap depth
reasons. On the other hand, there are other groups which
suppose that quenching of luminescence occurs for such
nanomaterials due to enhanced number of defects. To
clearly understand the current controversy and enhance
further the afterglow properties, we decided to assemble
these nanoscale materials and form it into 3D mesoporous
solids or aerogels. Aerogels are expected to ameliorate the
phosphorescence of this material as they are highly porous
(giving rise to mid gap states, hence better afterglow),
along with the higher surface area (leading to better
absorption properties, henceforth emission). Considering
these advantages, SrAl2O4:Eu2+Dy3+ based aerogels will
be synthesized and post-processed to obtain high quantum
yield nanophosphors.
e
:
gaganpreet.behrh@empa.ch