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:
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.
