Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 21, 2025
Abstract
Near‐infrared
second
region
(NIR‐II,
1000–1600
nm)
has
deeper
penetration
depth,
higher
sensitivity,
and
spatial
resolution
than
NIR
first
(NIR‐I,
700–1000
nm).
However,
Cr
3+
Ni
2+
‐doped
NIR‐I/NIR‐II
phosphor
with
serious
pollution
toxicity
issues
pose
limitations
for
the
application
of
these
phosphors.
Here,
Fe
Cs
2
NaLuCl
6
is
reported
by
grinding‐sintering
method,
which
shows
broadband
emission
in
range
nm
a
FWHM
≈309
nm,
while
PLQY
as
17.29%,
under
395
excitation.
The
unique
this
originates
from
activation
center
located
an
environment
extremely
weak
octahedral
crystal
field
provided
lattice.
A
pc‐LED
device
assembled
optimal
encapsulated
commercially
available
ultraviolet
LED
chip.
Which
output
23.5
mW
electro‐optical
conversion
efficiency
6.53%
100
mA
driving
current,
potential
demonstrated
night
vision,
bio‐imaging,
large‐scale
detection,
information
anti‐counterfeiting
high‐resolution
imaging.
Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 19, 2025
Abstract
Fe
3+
as
an
activator
for
Near‐infrared
(NIR)
phosphors
has
the
advantages
over
Cr
and
Ni
2+
due
to
its
abundant
resource,
low
cost,
nontoxic,
eco‐friendly
features,
making
it
a
luminescence
candidate
with
huge
commercial
potential.
However,
most
reported
‐activated
have
relatively
narrow
NIR
emission
of
600–950
nm
may
limit
their
applications.
Here,
new
strategy
is
expand
bandwidth
by
co‐doping
Yb
in
MgGa
2
O
4
phosphor
exhibited
broadband
that
covering
nm,
attributed
transition
:
T
1
(4G)→
6
A
(6S),
sharp
band
950–1100
F
5/2
→
7/2
,
which
extended
range
nearly
≈
150
compared
phosphor,
while
energy
transfer
between
demonstrated.
It
internal
quantum
efficiency
48.9%,
thermal
stability
measured
intensity
at
423
K
69.57%
293
K.
An
pc‐LED
device
prepared
lighting
source
night‐vision,
non‐destructive
imaging,
plant
cultivation
are
This
study
provides
extend
wavelength
nontoxic
phosphors.
Laser & Photonics Review,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 19, 2025
Abstract
Lead‐free
halide
double
perovskites
are
rapidly
gaining
prominence
as
a
nontoxic,
highly
stable,
and
versatile
alternative
to
traditional
lead‐based
perovskites,
notable
for
their
superior
optoelectronic
properties.
Among
these,
rare‐earth‐based
(RHDPs)
notably
stand
out.
Comprising
fifteen
lanthanide
elements
with
distinctive
electron
configurations
of
[Xe]
4f
n−1
5d
0−1
6s
2
(
n
=
1–15),
alongside
the
group‐IIIB
Yttrium
(Y)
Scandium
(Sc),
rare‐earth
(RE)
exhibit
great
potential.
These
17
RE
ions
(Sc
3+
,
Y
La
–Lu
)
offer
vast
landscape
crafting
numerous
RHDPs,
poised
properties
that
surpass
diversify
beyond
current
perovskite
standards.
Key
functionality
unique
luminescence
driven
by
self‐trapped
exciton
(STE)
recombination,
4f→4f
5d→4f
transitions,
enabling
applications
in
visible
infrared
light
emission
through
downshifting
up‐conversion.
This
review
thoroughly
articulates
foundational
including
structural‐property
relationships,
synthesis
methods,
optical
characteristics,
durability.
It
highlights
recent
advancements
across
range
fields
such
near‐infrared
emitting
diodes
(Vis&NIR
LEDs),
sensors,
anti‐counterfeiting
technologies.
Additionally,
discusses
prevailing
challenges
associated
RHDP
materials
applications,
offering
insights
future
directions.
Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 21, 2025
Abstract
Near‐infrared
second
region
(NIR‐II,
1000–1600
nm)
has
deeper
penetration
depth,
higher
sensitivity,
and
spatial
resolution
than
NIR
first
(NIR‐I,
700–1000
nm).
However,
Cr
3+
Ni
2+
‐doped
NIR‐I/NIR‐II
phosphor
with
serious
pollution
toxicity
issues
pose
limitations
for
the
application
of
these
phosphors.
Here,
Fe
Cs
2
NaLuCl
6
is
reported
by
grinding‐sintering
method,
which
shows
broadband
emission
in
range
nm
a
FWHM
≈309
nm,
while
PLQY
as
17.29%,
under
395
excitation.
The
unique
this
originates
from
activation
center
located
an
environment
extremely
weak
octahedral
crystal
field
provided
lattice.
A
pc‐LED
device
assembled
optimal
encapsulated
commercially
available
ultraviolet
LED
chip.
Which
output
23.5
mW
electro‐optical
conversion
efficiency
6.53%
100
mA
driving
current,
potential
demonstrated
night
vision,
bio‐imaging,
large‐scale
detection,
information
anti‐counterfeiting
high‐resolution
imaging.
