Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 16, 2024
Abstract
Cr
3+
‐doped
near‐infrared
(NIR)
phosphors
have
attracted
significant
attention
in
recent
years.
Despite
this,
achieving
high‐performance
NIR
with
broadband
emission
and
excellent
thermal
stability
remains
a
considerable
challenge.
This
study
presents
Lu
3
Ga
5
O
12
:Cr
,
which
demonstrates
tunable
peak
ranging
from
705
to
759
nm
an
increased
full‐width
at
half‐peak
maximum
(FWHM)
46
139
by
substituting
the
[Mg
2+
‐Ge
4+
]
chemical
unit
for
[Ga
‐Ga
unit.
Additionally,
MgGa
GeO
Yb
energy
transfer
channel
(Cr
‐Yb
)
is
constructed.
Under
blue
light
excitation,
characteristic
peaks
of
(600–900
nm)
(900–1100
are
observed
simultaneously.
However,
band
between
850
900
relatively
weak,
resulting
discontinuous
spectrum.
To
address
Nd
proposed,
exhibit
continuous
FWHM
253
internal
quantum
efficiency
47.3%.
The
luminescence
intensity
retains
81%
its
room
temperature
value
even
423
K.
Combining
this
new
phosphor
LED
chip
results
portable
source
potential
applications
non‐destructive
detection,
information
encryption,
bio‐imaging,
remote
control.
work
offers
novel
perspective
developing
phosphors.
Journal of Materials Chemistry C,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
The
NIR
pc-LED
prepared
with
LMSS:Cr
3+
,Yb
performed
well
in
night
vision,
nondestructive
testing,
multiple
anti-counterfeiting
and
information
encryption
technologies.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 24, 2024
Abstract
The
skillful
combination
of
luminescent
thermometry
and
optical
heating
has
enabled
the
development
density
meters.
However,
developing
such
sensing
materials
with
predefined
performance
requires
an
understanding
which
material
parameters
play
a
dominant
role
in
response
system.
In
this
study,
systematic
investigation
is
conducted
on
influence
host
composition
crystal
field
strength
affecting
Cr
3+
ions
ratiometric
meter
based
2
E→
4
A
to
T
→
luminescence
intensity
ratio
(LIR)
Y
3
Al
5‐
x
Ga
O
12
:Cr
.
As
shown,
LIR
reveals
thermal
variation
according
Boltzmann
distribution
these
over
160
500
K
range.
at
higher
temperatures,
monotonic
changes
are
still
observed.
This
meters
high
sensitivity,
operating
wide
range
power
densities
(<5500
W
cm
−
).
maximum
sensitivity
found
for
,
reaching
0.086%
−1
highest
value
reported
date
among
all
‐based
It
demonstrated
that
strong
favorably
influences
analyzed
systems,
thereby
achieving
low
(<1000
it
also
limits
material.
Conversely,
extend
meter,
intermediate
or
strengths
preferred.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 18, 2024
Abstract
Night‐time
individual
identification
requires
recognizing
a
specific
object
from
bunch
of
homogeneous
entities
through
night‐vision
devices.
It
will
facilitate
more
effective
coordinated
actions
in
night‐time
disaster
rescue
or
enforcement
actions.
In
this
work,
the
near
infrared
(NIR)
persistent
luminescent
materials
are
proposed
as
technology
solution,
which
can
emit
non‐visible
photons
continuously
for
hours
without
external
excitation.
magnetoplumbite‐type
structure,
Cr
3+
ions
incorporated
to
realize
NIR
emissions.
By
co‐doping
lanthanide
and
constitutional
modulation,
afterglow
signal
be
clearly
traced
under
device
over
144
h.
A
series
spectral
measurements
utilized
reveal
mechanism
behind
prolonged
duration,
quantum
tunneling
accounts
carrier
pumping
deep
traps.
avoids
quick
exhaust
carriers
stored
shallow
traps,
extends
duration.
proof‐of‐concept
demonstration,
synthesized
powders
used
make
response
pattern,
visualized
dark
room
by
This
work
is
expected
promote
research
development
within
region,
accelerate
applications
monitoring
recognition.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 16, 2024
Abstract
Cr
3+
‐doped
near‐infrared
(NIR)
phosphors
have
attracted
significant
attention
in
recent
years.
Despite
this,
achieving
high‐performance
NIR
with
broadband
emission
and
excellent
thermal
stability
remains
a
considerable
challenge.
This
study
presents
Lu
3
Ga
5
O
12
:Cr
,
which
demonstrates
tunable
peak
ranging
from
705
to
759
nm
an
increased
full‐width
at
half‐peak
maximum
(FWHM)
46
139
by
substituting
the
[Mg
2+
‐Ge
4+
]
chemical
unit
for
[Ga
‐Ga
unit.
Additionally,
MgGa
GeO
Yb
energy
transfer
channel
(Cr
‐Yb
)
is
constructed.
Under
blue
light
excitation,
characteristic
peaks
of
(600–900
nm)
(900–1100
are
observed
simultaneously.
However,
band
between
850
900
relatively
weak,
resulting
discontinuous
spectrum.
To
address
Nd
proposed,
exhibit
continuous
FWHM
253
internal
quantum
efficiency
47.3%.
The
luminescence
intensity
retains
81%
its
room
temperature
value
even
423
K.
Combining
this
new
phosphor
LED
chip
results
portable
source
potential
applications
non‐destructive
detection,
information
encryption,
bio‐imaging,
remote
control.
work
offers
novel
perspective
developing
phosphors.
