Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 10, 2025
Phosphors
for
white
light-emitting
diodes
(WLEDs)
would
suffer
from
inadequate
luminescent
thermal
stability,
especially
at
high
temperatures,
affecting
both
the
reliability
and
lifespan
of
devices.
Thus,
development
phosphors
with
excellent
stability
is
a
crucial
task.
By
use
high-temperature
solid-state
reaction
method,
series
Tb3+
Eu3+
codoped
NaGd2Ga3Ge2O12
(abbreviated
as
NGGGO)
has
been
successfully
synthesized.
With
an
appropriate
doping
concentration
Eu3+,
NGGGO:Tb3+,Eu3+
can
provide
color
tunable
emissions;
simultaneously,
energy
transfer
(ET)
efficiency
to
reach
nearly
100%.
Notably,
high-concentration
in
NGGGO
could
induce
oxygen
vacancies,
giving
significant
enhancement
on
luminescence.
For
NGGGO:60%
Tb3+,1.6%
phosphor,
emission
intensity
450
K
remained
even
higher
than
that
observed
under
room-temperature
conditions.
as-synthesized
phosphor
red
converter,
near-ultraviolet
pumped
WLED
device
be
fabricated.
Under
driving
current
20
mA,
exhibits
rendering
index
(CRI)
∼
89,
low
correlated
temperature
(CCT)
4603
K,
bright
light
CIE
chromaticity
coordinates
(0.3569,
0.3587),
which
demonstrates
potential
application.
Dalton Transactions,
Journal Year:
2024,
Volume and Issue:
53(16), P. 6941 - 6949
Published: Jan. 1, 2024
Phosphors
with
intrinsic
white
light
emission
are
of
great
potential
in
constructing
high-quality
LEDs
(WLEDs).
In
this
work,
we
propose
the
use
energy
transfer
from
Bi
Materials Chemistry Frontiers,
Journal Year:
2024,
Volume and Issue:
8(23), P. 3962 - 3972
Published: Jan. 1, 2024
Structural
confinement
in
sodium-rich
garnets
enables
more
accurate
Tb
3+
–Eu
energy
transfer,
enhancing
luminescence
performance.
The
Na
+
-doped
system
shows
an
transfer
efficiency
of
95%
and
stable
emission
for
WLED
applications.
Luminescence,
Journal Year:
2024,
Volume and Issue:
39(1)
Published: Jan. 1, 2024
Abstract
Recently,
long
persistent
phosphors
(LPPs)
have
attracted
significant
attention
as
promising
candidates
for
biomedical
applications.
However,
the
serious
decrease
in
luminescence
intensity
tissue
still
remains
a
major
challenge.
Therefore,
exploring
more
competitive
LPPs
and
achieving
reproducible
imaging
is
crucial.
In
this
study,
new
series
of
near‐infrared
(NIR)
La
3
Ga
5
Sn
1‐x
O
14
:xCr
3+
(x
=
0.005–0.05)
were
synthesized
using
high‐temperature
solid‐state
method.
The
as‐synthesized
samples
characterized
X‐ray
diffraction,
diffuse/photoluminescence
spectroscopy,
fluorescence
decay
curves,
thermoluminescence
spectroscopy.
Upon
excitation
with
ultraviolet
light,
strong
emission
bands
observed
range
600–1200
nm
an
optimal
doping
concentration
x
0.02
mol.
Moreover,
SnO
:Cr
exhibits
due
to
presence
suitable
energy
traps,
which
prompted
phosphor
emit
NIR
light
even
after
removal
source.
