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.
Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
63(12), P. 5743 - 5752
Published: March 13, 2024
Phosphor-converted
white-light-emitting
diodes
(WLEDs)
with
superhigh
color
rendering
index
(CRI)
are
the
ongoing
pursuit
of
next-generation
solid-state
lighting.
One
most
important
challenges
is
limited
improvement
in
CRI
on
account
absence
a
cyan
component
typical
commercial
combination.
Here,
bright
broad-band
cyan-green-emitting
phosphor
cubic
garnet
structure,
SrLu2Al3ScSiO12:Ce3+
(SLASSO:Ce3+),
was
successfully
reported,
which
can
compensate
for
cavity
480–520
nm
blue-green
emission
region.
With
439
blue-light
irradiation,
as-fabricated
SLASSO:Ce3+
yields
cyan-green
maximum
peak
positioned
at
525
and
an
appropriate
full
width
half-maximum
(fwhm)
111
nm,
capable
providing
more
without
sacrificing
green
emission.
Meanwhile,
optimal
SLASSO:2%Ce3+
features
CIE
coordinates
(0.3254,
0.5470)
hue,
along
high
internal
quantum
efficiency
up
to
93%.
Additionally,
thermal
stability
measurements
different
temperatures
reveal
that
luminescence
intensity
proposed
retains
44%
its
original
integral
423
K
respect
room
temperature,
while
also
demonstrating
excellent
(ΔE
=
5.4
×
10–3).
This
work
shows
highly
efficient
be
utilized
as
potential
filling
gap,
resulting
construction
high-quality
warm
WLED
"human-centric"
sunlight-like
full-spectrum
illumination.
Journal of Advanced Ceramics,
Journal Year:
2023,
Volume and Issue:
12(5), P. 954 - 971
Published: Feb. 17, 2023
Novel
rare-earth
(RE;
e.g.,
europium
(Eu3+),
samarium
(Sm3+),
and
praseodymium
(Pr3+))
transition
metal
(TM4+;
manganese
(Mn4+))
ion
single-/co-doped
double-perovskite
Ca2InTaO6
(CITO)
phosphors
were
prepared
investigated
with
respect
to
their
crystal
structure
photoluminescence
(PL)
properties.
Among
them,
the
CITO:Eu3+
found
exhibit
an
ultra-high
internal
PL
quantum
yield
(89.1%)
good
thermal
stability
(78.7%
at
423
K
relative
initial
value
303
K).
As
such,
corresponding
packaged
white
light-emitting
diode
(LED)
was
able
display
a
remarkable
color
rendering
index
(CRI;
=
91.51@10
mA).
Besides,
potential
in
applications
of
anti-counterfeiting
fields
novel
LED
based
on
flexible
phosphor-converted
films
also
studied.
Moreover,
due
different
quenching,
trivalent
lanthanide
(Ln3+)/Mn4+
co-doped
CITO
designed
for
optical
thermometry
luminescence
intensity
ratio
(LIR)
between
4f
transitions
various
Ln3+
ions
2Eg
→
4A2g
(Mn4+)
transition.
Particularly,
LIR
4G5/26H9/2
peaks
activated
5
mol%
Sm3+
0.3
Mn4+
exhibited
most
excellent
sensitivity
(Sr;
3.80
%·K−1)
beneficial
temperature
uncertainty
0.0648
K.
Overall,
these
results
are
significance
offer
valuable
databases
constructing
multifunctional
high-performance
platforms
using
tantalates.
Journal of Materials Chemistry C,
Journal Year:
2024,
Volume and Issue:
12(6), P. 2037 - 2047
Published: Jan. 1, 2024
A
Na
2
Y
TeO
4
(BO
3
)
:Eu
3+
red
phosphor
was
developed.
Layered
structure-induced
concentration
quenching
delay
and
good
temperature
resistance
are
achieved
simultaneously.
