A series of Dy3+/Eu3+ co-doped BaLa4Si3O13 phosphors
were synthesized by a solid-state
reaction method. The Dy3+/Eu3+ co-doped BaLa4Si3O13 phosphors exhibit superior thermal
behavior to the corresponding Dy3+ singly doped and Eu3+ singly doped BaLa4Si3O13 phosphors. A remarkable enhancement of thermal stability is observed
as the Eu3+ concentration increases. The emission intensity
is enhanced by a factor of ∼1.1 at 423 K compared to that at
298 K for the 11 mol % Eu3+ doped sample. The improved
thermal stability is ascribed to the enhanced energy transfer from
Dy3+ to Eu3+ at high temperature, which enhances
the Eu3+ emission and effectively compensates the thermal
quenching-induced emission reduction. The synthesized phosphors can
further be employed as optical thermometry materials, with the highest
relative sensitivity (S
r) of 1.462% K–1 at 497 K. The results demonstrate that employing
energy transfer is an effective strategy to design anti-thermal phosphors
and the synthesized Dy3+/Eu3+ co-doped BaLa4Si3O13 phosphors show great potential
as red phosphors for white-light-emitting diodes and optical temperature
sensing applications.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.