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.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(15)
Published: Feb. 13, 2024
Abstract
Achieving
tunable
emissions
spanning
the
spectrum,
from
blue
to
near‐infrared
(NIR)
light,
within
a
single
component
is
formidable
challenge
with
significant
implication,
particularly
in
tailoring
multicolor
luminescence
for
anti‐counterfeiting
purposes.
In
this
study,
we
demonstrate
broad
spectrum
of
emissions,
covering
red
and
extending
into
NIR
light
[BPy]
2
Cd
X
4
:
x
Sb
3+
(BPy=Butylpyridinium;
=Cl,
Br;
=0
0.08)
through
precise
multisite
structural
fine‐tuning.
Notably,
CdBr
manifest
distinctive
pattern,
transitioning
yellow
tandem
host
further
its
homologous
CdCl
,
resulting
simultaneous
presence
intersecting
independent
emission
colors.
Detailed
modulation
chemical
composition
enables
partial
switching,
facilitating
creation
diverse
patterns
by
employing
as
phosphors.
This
study
first
time
successfully
implements
several
groups
colors
matrix
via
Such
an
effective
strategy
not
only
develops
specific
relationships
between
adjustable
compositions,
but
also
introduces
cost‐effective
straightforward
approach
achieving
unique,
high‐level,
plentiful‐color
multiple‐information‐storage
labels
advanced
applications.
Crystal Growth & Design,
Journal Year:
2024,
Volume and Issue:
24(8), P. 3355 - 3369
Published: March 27, 2024
In
the
process
of
studying
newfangled
phosphor-converted
white-light-emitting
diodes
(pc-wLEDs),
some
basic
and
important
objectives
phosphor,
i.e.,
high
chemical/thermal
stability,
color
rendering
index
(CRI),
low
correlated
temperature
(CCT),
should
pass
muster
simultaneously.
Herein,
for
first
time,
a
series
photoluminescence
(PL)
color-tunable
single-phase
Ca3Y(GaO)3(BO3)4:
Dy3+/Sm3+/La3+
(CYGB:
Dy/Sm/La)
phosphors
with
good
dispersivity,
crystallinity,
size
uniformity
have
been
designed
synthesized
via
facile
solid-state
reaction
method.
Structurally,
based
on
XRD
Rietveld
refinements,
tendentious
occupations
Dy/Sm/La
Y3+
site
9-coordinated
number
(CN)
over
other
cationic
sites
are
in
line
facts
that
ionic
radius
charge
difference
much
closer
to
9-CN
than
7-CN
Ca2+
both
9-
7-CN.
Spectrally,
thanks
"cool"
white
PL
from
4f–4f
transitions
Dy
red-emitting
Sm,
polychromatic
including
"warm"
light
efficiency
could
be
realized
CYGB:
Dy/Sm
regulation
doping
content
energy
transfer
(ET).
Intriguingly,
"abnormal"
phenomena
zero-thermal-quenching
range
room
(RT)
573
K
were
observed,
probably
owing
synergistic
effects
electron–phonon
coupling,
ET,
structural
defects.
Moreover,
by
tridoping
La3+
legitimately
adjust
environments,
further
tuned
because
they
all
include
hypersensitive
closely
related
crystal
field
environment.
Finally,
as
proof-of-concept
fabrication,
pc-wLED
assembled
combination
composition-optimized
an
n-UV
LED
chip
remote
"capping"
packaging
shows
attractive
performances,
indicating
its
potential
efficient
phosphor
wLEDs.
Nano Materials Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 1, 2024
Developing
high
efficient
and
stable
red-emitting
phosphors
is
very
important
in
the
areas
of
white
lighting-emitting
diode
(white-LED)
plant
growth.
Herein,
series
Eu3+-activated
MF2
(M2+
=
Ca2+,
Sr2+,
Ba2+)
nanoparticles
(NPs)
were
synthesized
at
room
temperature.
Excited
394
nm,
these
resulting
NPs
can
emit
dazzling
red
emissions
their
fluorescence
intensities
are
sensitive
to
both
dopant
content
host
compound.
Moreover,
it
found
that
studied
samples
have
admirable
thermal
stability,
quantum
efficiencies
color
purities,
which
be
regulated
via
changing
material.
To
assess
possible
application
final
products,
three
different
white-LEDs
packaged
by
using
NPs.
Clearly,
manufactured
produce
glaring
warm
with
satisfied
electroluminescence
behaviors,
i.e.
low
correlated
temperature
(<5000
K)
rendering
index
(>80).
Furthermore,
designed
NPs,
LEDs
also
fabricated
so
as
identify
applications
Our
findings
imply
well-suited
for
dual-functional
lighting
converters
realms
white-LED
artificial
growth
LED.
