Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 7, 2024
High-performance
near-infrared
(NIR)
light
sources
are
highly
sought
after
in
advanced
spectroscopy
techniques,
driving
the
development
of
NIR
phosphor-converted
light-emitting
diodes
(pc-LEDs).
Escalating
luminescence
intensity
and
thermal
stability
NIR-emitting
phosphors,
which
is
a
core
component
pc-LEDs,
paramount
importance.
Herein,
chemical
unit
cosubstitution
cosolvent
addition
tactics
were
implemented
to
simultaneously
boost
performance
synthesized
phosphors.
The
replacement
[Sc
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 3, 2024
Abstract
Ultrabright
broadband
near‐infrared
(NIR)
phosphor‐converted
laser
diode
(pc‐LD)
as
a
light
source
is
increasingly
essential
for
improving
the
sensitivity
and
spatial
resolution
of
intelligent
NIR
spectroscopy
technologies.
However,
performance
pc‐LD
greatly
hindered
by
low
external
quantum
efficiency
(EQE)
poor
thermal
resistance
phosphor
materials.
Herein,
highly
stable
phosphor‐in‐ceramic
(PiC)
film
deposited
on
high
conductivity
substrate,
in
which
NIR‐emitting
Ca
3
MgHfGe
O
12
:Cr
3+
incorporated
into
glass‐crystallized
Ga
2
Ge
ceramic
matrix,
along
with
formation
new
type
PiC
composite
material
efficiency,
absorbance,
conductivity,
designed
prepared.
The
obtained
exhibits
an
impressive
EQE
57.7%,
17.1
W
m
−1
K
,
wheel
demonstrates
emission
exceeding
5
when
excited
450
nm
laser.
Finally,
groundbreaking
electrically
driven
device
based
achieves
1.6
output,
enabling
multiple
applications
archaeology
night
vision
imaging.
This
work
paves
way
advancing
sources
diverse
range
photonic
applications.
Abstract
Developing
tunable
broadband
near‐infrared
(NIR)
fluorescent
materials
with
outstanding
luminescence
properties
and
superior
thermal
robustness
remains
a
significant
challenge
for
next‐generation
intelligent
NIR
light
sources.
Herein,
high‐performance
large‐scale
NIR‐emitting
garnet‐type
phosphor,
SrLu
2
Al
3
ScSiO
12
:Cr
3+
(SLASSO:Cr
),
is
presented.
Upon
450
nm
blue
excitation,
SLASSO:1%Cr
phosphor
yields
emission
full
width
at
half
maximum
of
108
prominent
sharp
peak
694
superimposed
on
radiation,
which
attributed
to
the
co‐occupation
Cr
ions
dominant
[AlO
6
]
octahedral
site
(Cr1
site)
subordinate
[ScO
(Cr2
site).
Remarkably,
as
⁺
content
increases,
red‐shift
in
wavelength
spanning
from
785
bandwidth
broadening
89
152
are
observed,
stems
weakening
crystal
field
strength
energy
redistribution
within
Cr1
Cr2
centers
regulated
by
formation
local
‐Cr
ion
pairs.
Notably,
optimal
sample
boasts
an
excellent
internal
quantum
efficiency
89.4%
exceptional
stability
(97.6%@423
K).
Additionally,
fabricated
phosphor‐converted
light‐emitting
diode
devices
demonstrate
promising
multi‐functional
applications,
including
plant
cultivation,
night
vision,
bioimaging
non‐destructive
detection.
