ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(36), P. 47952 - 47960
Published: Aug. 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
Abstract
The
performance
of
the
near‐infrared
phosphor‐converted
light‐emitting
diodes
(NIR
pc‐LEDs)
mainly
depends
on
NIR
emitting
phosphors
used.
Cr
3+
doped
materials
can
be
excited
by
blue
light
chips,
but
their
emission
is
located
in
NIR‐I
region
(650–1000
nm).
Ni
2+
are
NIR‐II
(1000–1700
nm),
they
cannot
effectively
chips.
Herein,
,
mono‐doped,
and
co‐doped
Sr
2
GaTaO
6
prepared
investigated.
ions
occupy
two
octahedral
sites
Ga
Ta
5+
.
co‐doping
has
achieved
breakthroughs.
One
to
shift
optimal
excitation
wavelength
from
violet
due
energy
transfer
(efficiency
up
70%)
other
achieve
broadband
continuous
across
regions
(650–1700
nm,
with
a
full
width
at
half
maximum
(FWHM)
410
nm
(173
+
237
nm)).
:
0.02Cr
0.01Ni
phosphor
combined
commercial
460
chip
realize
its
application
organic
compounds
identification,
night
vision,
biological
imaging.
This
work
points
out
direction
for
future
development
efficient
super
NIR‐emitting
phosphors.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(44)
Published: May 22, 2024
Abstract
The
double
perovskite
material
of
Cs
2
NaRECl
6
‐type,
utilizing
rare‐earth
(RE)
ions
as
trivalent
element,
has
attracted
widespread
interest
due
to
its
unique
optoelectronic
properties
and
wide
range
applications.
It
displays
rich
optical
properties,
including
visible
infrared
light
emission
through
down‐shifting,
well
up‐conversion
radiation‐induced
emission.
These
exceptional
make
it
a
promising
for
devices
such
detectors,
light‐emitting
diodes,
lasers
energy
storage
batteries
but
also
show
advantages
in
anti‐counterfeiting
technology
imaging.
In
this
article,
the
latest
progress
is
reported
challenges
crystal
structure,
preparation,
performance,
various
applications
lead‐free
halide
(HLDPs)
compounds.
This
outline
prospective
research
directions
existing
materials,
with
aim
facilitating
discovery
new
HLDPs
materials.
InfoMat,
Journal Year:
2024,
Volume and Issue:
6(5)
Published: March 28, 2024
Abstract
Near‐infrared
(NIR)
luminescent
metal
halide
(LMH)
materials
have
attracted
great
attention
in
various
optoelectronic
applications
due
to
their
low‐temperature
solution‐processable
synthesis,
abundant
crystallographic/electronic
structures,
and
unique
properties.
However,
some
challenges
still
remain
luminescence
design,
performance
improvement,
application
assignments.
This
review
systematically
summarizes
the
development
of
NIR
LMHs
through
classifying
origins
into
four
major
categories:
band‐edge
emission,
self‐trapped
exciton
(STE)
ion
defect‐related
emission.
The
mechanisms
different
types
are
discussed
detail
by
analyzing
typical
examples.
Reasonable
strategies
for
designing
optimizing
luminescence/optoelectronic
properties
summarized,
including
bandgap
engineering,
self‐trapping
state
chemical
composition
modification,
energy
transfer,
other
auxiliary
such
as
improvement
synthesis
scheme
post‐processing.
Furthermore,
prospects
based
on
devices
revealed,
phosphor‐converted
light‐emitting
diodes
(LEDs),
electroluminescent
LEDs,
photodetectors,
solar
cells,
x‐ray
scintillators,
well
demonstrations
related
practical
applications.
Finally,
existing
future
perspectives
LMH
critically
proposed.
aims
provide
general
understanding
guidance
design
high‐performance
materials.
image
Materials Horizons,
Journal Year:
2024,
Volume and Issue:
11(9), P. 2230 - 2241
Published: Jan. 1, 2024
We
developed
three
NIR
emitters
of
Sb
3+
-doped
0D
organic
metal
chlorides
and
demonstrated
their
night
vision
applications
in
vision.
One
shows
tunable
emission
characteristics
quintuple-mode
fluorescence
anti-counterfeiting
information
encryption.
Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
63(14), P. 6555 - 6563
Published: March 26, 2024
Near-infrared
(NIR)
phosphor
conversion
light-emitting
diodes
(pc-LEDs)
have
great
application
potential
as
NIR
light
sources
in
many
fields
such
food
analysis,
night
vision
illumination,
and
bioimaging
for
noninvasive
medical
diagnosis.
In
general,
phosphors
synthesized
by
a
high-temperature
solid-phase
method
large
particle
sizes
to
be
processed
fine
powders
grinding
process,
which
may
introduce
surface
defects
lower
the
luminous
efficiency.
Here,
we
report
sol–gel
sintering
with
ammonium
nitrate
citric
acid
sacrificing
agents
synthesize
high
purity,
nanosized
(less
than
50
nm)
Zr4+/Ni2+
codoped
MgAl2O4
spinel
phosphors,
is
matrix,
Ni2+
center,
Zr4+
acts
charge
compensator.
We
systematically
characterized
crystal
structures
luminescence
properties
of
Ni2+-doped
MgAl2O4.
Under
390
nm
excitation,
emission
spectrum
covers
900–1600
nm,
half-peak
width
251
peak
position
located
at
1230
nm.
demonstrated
that
incorporating
small
amounts
compensator,
intensity
was
doubled
over
phosphor.
The
optimal
content
compensator
2
mol
%.
More
importantly,
inclusion
led
improved
thermal
stability
properties,
measured
100
°C
33.83%
room
temperature
(20
°C).
This
study
demonstrates
nanomaterials
high-purity
enhanced
optical
can
designed
through
compensation
strategy
method.
