Abstract
Photostimulated
luminescence
in
the
ultraviolet
(PSL‐UV)
holds
promise
for
high‐security
anti‐counterfeiting
applications,
especially
brightly
lit
environments.
Despite
its
potential,
research
on
PSL‐UV
is
relatively
limited.
Here,
properties
of
a
NaYF
4
:Gd
3+
fluoride‐based
phosphor
explored,
demonstrating
suitability
advanced
purposes.
This
effectively
captures
excitation
energy
from
X‐rays
and
subsequently
emits
UV
light
at
311
nm
when
stimulated
by
visible
ambient
light.
Remarkably,
material
exhibits
exceptional
reliability
durability,
maintaining
effectual
output
even
after
enduring
exposure
to
100
cycles
subsequent
decay.
Furthermore,
imaging
experiments
highlight
practicality
real‐world
implementation,
presenting
fresh
robust
strategy
enhancing
security
authentication
processes.
Applied Physics Reviews,
Journal Year:
2024,
Volume and Issue:
11(4)
Published: Oct. 31, 2024
Discovering
light
dosimeters
that
can
function
effectively
from
liquid
nitrogen
temperature
to
700
K
presents
significant
challenges.
Such
facilitate
a
range
of
cutting-edge
applications,
including
anti-counterfeiting
measures
at
low
for
cryo-preservation.
To
such
discovery,
stacked
vacuum
referred
binding
energy
diagrams
the
LiYGeO4
cluster
crystals
have
been
first
constructed.
They
offer
robust
method
controlling
both
electron
and
hole
trapping
depth
in
crystals.
Wide
shifting
Bi2+
Eu2+
thermoluminescence
(TL)
glow
bands
emerges
200
500
LiYxLu1-xGeO4:0.01Bi3+
LiYxLu1-xGeO4:0.01Bi3+,
0.001Eu3+,
by
changing
x,
facilitating
conduction
band
tailoring.
Bi4+
TL
300
LiYGezSi1-zO4:0.01Bi3+,
tuning
z,
valence
peaks
near
135,
185,
232,
311
emerge
LiyNa1-yYGeO4:
0.001Bi3+.
Particularly,
discovered
Bi3+
or/and
lanthanide
modified
exhibit
superior
charge
carrier
storage
capacity
minimal
fading
properties.
For
instance,
ratio
intensity
optimized
LiYGe0.75Si0.25O4:0.001Bi3+
industrial
BaFBr(I):Eu2+
is
as
high
∼4.
Interestingly,
imaging
intense
optically
driven
ultraviolet-A
(UVA)
luminescence
has
validated
254
nm
energized
LiY0.25Lu0.75GeO4:0.01Bi3+
with
100
lux
white
LED
illumination.
Together
ZnS:Mn2+,
LiTaO3:Bi3+,
Sm3+,
Cs2ZrCl6:Sb3+
perovskites,
realization
wide
offers
promising
use
versatile
anti-counterfeiting,
information
storage,
delayed
x-ray
purposes.
Journal of Materials Chemistry C,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
A
new
type
of
niobate
perovskite
structure
Sr
4
GaNbO
8
:Mn
4+
has
been
prepared
by
us,
which
is
different
from
previous
compounds
and
excellent
relative
absolute
sensitivities
as
well
good
repeatability.
Journal of Materials Chemistry C,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
We
successfully
developed
a
series
of
LLGO
Bi
3+
:Ln
phosphors
with
multicolour
and
multimode
luminescence
for
information
storage
anti-counterfeiting
by
deliberately
manipulating
the
trap
state
carrier
transport
process.
Journal of Materials Chemistry C,
Journal Year:
2024,
Volume and Issue:
12(34), P. 13268 - 13278
Published: Jan. 1, 2024
A
cation
site
modulation
strategy
is
proposed
to
regulate
the
emission
wavelength
of
Fe
3+
-activated
spinel
phosphors
with
superior
anti-quenching
properties.
Abstract
Photochromic/thermochromic
materials
face
challenges
in
practical
applications
due
to
limited
stability
and
single‐mode
responses.
Herein,
a
strategy
is
presented
achieve
both
highly
stable
photochromism
thermochromism
single‐phase
Cs₂ZrCl₆
halide
perovskite
through
trap
energy
level
manipulation
via
Bi
3
⁺
doping
thermal
recrystallization.
Strikingly,
the
synthesis
of
this
allochroic
expeditious,
requiring
only
≈10
s
co‐precipitation
method.
creates
unique
defects
with
broad
depth
distribution,
resulting
photochromic
properties.
Upon
UV
irradiation
(254
or
365
nm),
color
Cs₂ZrCl₆:0.02Bi
changes
from
white
pink,
which
can
be
physically
visible
naked
eye
luminance
≈50
cd
m
−
2
maintained
>20
days
under
ambient
light.
Additionally,
thermochromic
response
observed,
photoluminescence
shifting
blue
cyan
after
being
kept
at
523
K,
associated
≈20
nm
redshift
emission
band.
These
dual
properties
enable
potential
use
for
multimodal
information
storage
advanced
anti‐counterfeiting
applications.
This
work
not
introduces
novel
capabilities
but
also
provides
new
insights
into
design
strategic
engineering.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 3, 2025
Abstract
Optimizing
charge
carrier
storage
in
trap‐controlled
halide
perovskites
poses
a
significant
challenge,
particularly
due
to
the
varying
electronic
properties
and
trap
dynamics
across
temperature
range
from
≈100
400
K.
This
dependence
affects
both
efficiency
of
generation
their
retention.
In
this
study,
substantial
advancements
performance
zirconium
stannum
are
reported
through
targeted
defect
engineering.
By
modulating
composition
Cs
2
Sn
1‐x
Zr
x
Cl
6
incorporating
dopants
Cr
3+
,
Ga
Bi
Te
4+
remarkable
enhancements
X‐ray
triggered
capacity
realized.
Notably,
ZrCl
doped
with
or
exhibits
three
fold
increase
100
300
K,
significantly
outperforming
state‐of‐the‐art
BaFBr(I):Eu
2+
red
afterglow
Y
O
S:Eu
phosphor.
The
:yTe
demonstrates
over
40
times
greater
wide
K
achieves
low
detection
limit
99.16
nGy
for
dosimetry
applications.
Furthermore,
:0.03Te
exceptional
persistent
luminescence
lasting
14
h
at
180
295
research
underscores
high‐performance
capabilities
engineered
perovskites,
paving
way
application
advanced
technologies
temperatures.
