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.
ACS Materials Letters,
Год журнала:
2024,
Номер
6(10), С. 4555 - 4563
Опубликована: Сен. 3, 2024
Presently,
there
are
very
limited
options
for
a
broad-band
long-wavelength
near-infrared
phosphor-converted
light-emitting
diode
(LWNIR
pc-LED)
with
wavelengths
above
∼1500
nm,
and
most
LWNIR
phosphors
have
low
luminescence
quantum
efficiency.
Here,
Ni2+-doped
MgIn2O4
antispinel
were
prepared
by
high-temperature
solid-state
reaction
method.
Under
365
nm
excitation,
they
exhibited
emission
in
the
range
of
1200–2100
an
peak
∼1490
full
width
at
half-maximum
∼313
indicating
weak
crystal
field
environment
high
electron
polarization
around
center
[MgO6]
octahedron.
The
IQE
EQE
MgIn2O4:Ni2+
∼47.93%
∼34.66%,
respectively.
optimized
phosphor
was
encapsulated
LED
chip
to
obtain
pc-LED
device
night
vision
lighting,
nonvisual
detection,
biological
imaging.
Our
results
confirmed
that
lighting
based
imaging
technology
showed
clear
safety
advantages
over
traditional
high-energy
ray
Inorganic Chemistry Frontiers,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
We
developed
a
Cr
3+
-doped
Cs
2
NaLuCl
6
by
grinding–sintering
method,
which
exhibited
emission
peaked
at
around
960
nm,
with
FWHM
of
∼182
and
the
IQE
EQE
optimized
phosphor
were
as
high
∼92.9%
∼60.75%,
respectively.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(36), С. 47952 - 47960
Опубликована: Авг. 27, 2024
Long-wavelength
near-infrared
(LWNIR)
imaging
technology
has
exciting
application
potential
across
various
fields
due
to
its
ability
of
deeper
penetration
and
unique
properties
related
emission
wavelength,
when
compared
short-wavelength
imaging.
However,
the
limited
availability
materials
for
LWNIR
light
sources,
lack
suitable
host
that
constitute
luminescence
centers,
been
a
major
challenge
technical
obstacle
in
realizing
such
applications.
Here,
we
developed
MgIn
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
We
developed
Ni
2+
-doped
(Sr/Ba)
2
MgMoO
6
double
perovskite
molybdate-based
solid-solution
long
wavelength
near-infrared
luminescence
(1000–2000
nm)
phosphors,
which
shiftss
in
the
range
of
1400–1610
nm
by
simple
adjustment
Sr/Ba
ratio.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(46), С. 63831 - 63839
Опубликована: Ноя. 12, 2024
Near-infrared
(NIR)
light
allows
fast
and
nondestructive
detection
with
deep
penetration
into
biological
tissues
is
widely
used
in
food
inspection,
biomedical
imaging,
night
vision
security,
other
fields.
Cr3+-doped
NIR
first
region
(NIR-I)
phosphors
have
many
interesting
features
that
attracted
a
lot
of
attention
recently.
However,
practical
issues,
such
as
low
photoluminescence
quantum
efficiency
poor
thermal
stability,
need
to
be
addressed.
We
synthesized
Lu2SrAl4SiO12
garnet-type
using
high-temperature
solid-state
reaction
method.
Under
blue-light
(@
430
nm)
excitation,
the
exhibited
broadband
NIR-I
emission
range
600–1000
nm,
an
peak
at
710
nm.
This
system
unique,
had
multipeak
sharp-line
superposition
Cr3+
ions
were
situated
relatively
strong
crystal
field
environment,
opposed
weak
environment
for
matrix.
The
optimal
doping
content
was
2
mol
%,
its
internal
∼76.8%.
Surprisingly,
this
phosphor
showed
antithermal
quenching
effect,
integrated
luminescence
intensity
measured
573
K
206.3%
303
K.
found
caused
by
extremely
expansion
coefficient
rigid
structure
matrix
temperature
range,
well
weakening
electron–phonon
coupling
increasing
temperature.
optimized
packaged
blue
chip
phosphor-converted
light-emitting
diode
device.
source
device
output
power
119.02
mW
electro-optical
conversion
11.02%
under
driving
current
300
mA.
application
potential
demonstrated
high-resolution
imaging.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(44), С. 60599 - 60607
Опубликована: Окт. 22, 2024
Near-infrared
phosphor-converted
light-emitting
diodes
(NIR
pc-LEDs)
as
a
new
NIR
light
source
has
outstanding
application
potential
in
the
fields
of
spectroscopy
analysis,
sensing,
imaging,
and
pattern
recognition.
Therefore,
development
phosphors
with
good
luminescence
thermal
stability
attracted
much
attention.
To
this
end,
we
developed
LiAlO2:Cr3+
garnet-type
by
high-temperature
solid-state
reaction
method.
Under
405
nm
excitation,
Cr3+
ions
located
tetrahedrons
LiAlO2
emit
emission
broadband
that
covers
650-900
mixed
several
sharp
narrowband
R-line
emissions,
which
showed
excellent
integrated
intensity
measured
at
573
K
is
∼90.86%
303
caused
structural
rigidity
low
expansion
coefficient
matrix
material.
An
pc-LED
device
assembled
optimized
commercially
available
purple
LED
chip
emitted
output
power
∼98.172
mW
driving
current
300
mA
demonstrated
an
electro-optical
conversion
efficiency
∼9.09%,
while
it
night
vision
monitoring
biomedical
imaging.
