Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 6, 2024
Abstract
Advanced
optical
information
encryption
usually
relies
on
the
integration
of
multicolor,
stimulus‐responsive,
and
afterglow
luminescence.
However,
achieving
these
simultaneously
within
a
single‐phase
system
has
posed
challenges,
complicating
design
process.
In
this
study,
an
advanced
3D
strategy
is
presented
based
undoped
alloyed
Cs₂CdCl₄,
encrypted
through
three
distinct
channels:
emission
wavelength,
water
stimulation,
time.
Specifically,
Mn
2+
,
Sb
3+
Ag
+
doped
Cs₂CdCl₄
single
crystals
are
successfully
synthesized
via
modified
hydrothermal
method,
which
exhibit
bright
orange,
green,
blue
emissions,
respectively.
Decryption
specific
can
be
achieved
by
employing
corresponding
narrowband
filters.
Furthermore,
demonstrates
hydrochromism,
attributed
to
water‐induced
sequential
phase
transitions.
Upon
treatment,
2D
will
undergo
transition
Cs
3
Cd
2
Cl
7
finally
cubic
CsCdCl
.
Interestingly,
resultant
exhibits
pronounced
afterglow,
originating
from
triplet
ions.
Leveraging
unique
properties,
highly
secure
adjustable
quick
response
code
designed.
The
encoded
in
coordinates,
decrypted
retrieved
both
compressed
decompressed
modes
as
required.
These
findings
pave
way
for
development
novel
smart
photonic
materials
multimodal
encryption.
Chemical Engineering Journal,
Journal Year:
2024,
Volume and Issue:
485, P. 149741 - 149741
Published: Feb. 16, 2024
Metal
halide
perovskites
showing
responses
to
external
stimuli
have
emerged
as
a
new
class
of
stimulus-responsive
smart
materials.
Specifically,
their
photoluminescence
(PL)
intensity,
color
and
lifetime
can
change
with
different
stimuli.
However,
most
the
existing
metal
only
show
PL
response
single
stimulus.
For
encryption
security
applications,
it
is
desired
selective
multiple
Herein,
we
developed
type
cesium
(Cs)
manganese
(Mn)
bromide
(Br)
perovskite
(Cs2MnBr4(H2O)2)
crystal
temperature,
humidity
solvent
by
taking
advantage
its
structural
phase
transition,
which
causes
intensity
(from
non-luminescent
near
unity
luminescence)
green
red).
Stimuli-responsive
be
achieved
engineering
structure
Cs-Mn-Br
from
Cs2MnBr4(H2O)2
Cs2MnBr4,
Cs3MnBr5,
CsMnBr3(H2O)2
CsMnBr3
via
temperature
solvents.
Such
responsive
material
promising
for
multidimensional
information
encryption.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(33)
Published: May 31, 2024
Abstract
Multi‐excitonic
emitting
materials
in
luminescent
metal
halides
are
emerging
candidates
for
anti‐counterfeiting
and
information
encryption
applications.
Herein,
ATPP
2
SnCl
6
(ATPP=acetonyltriphenylphosphonium)
phase
was
designed
synthesized
by
rationally
choosing
emissive
organic
reagent
of
ATPPCl
non‐toxic
stable
ions
Sn
4+
,
Sb
3+
further
doped
into
to
tune
the
photoluminescence
with
external
self‐trapped
excitons
emission.
The
derived
shows
multi‐excitonic
centers
verified
optical
study
differential
charge‐density
from
density
functional
theory
calculations.
Incorporation
dopants
increasing
concentrations
induce
efficient
energy
transfer
therein,
thus
enhancing
quantum
yield
5.1
%
73.8
%.
emission
inspires
creation
decryption
leveraging
host
:
.
This
facilitates
application
employing
solution‐processable
excitation‐dependent
PL
properties.
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
unknown
Published: May 31, 2024
Abstract
Multi‐excitonic
emitting
materials
in
luminescent
metal
halides
are
emerging
candidates
for
anti‐counterfeiting
and
information
encryption
applications.
Herein,
ATPP
2
SnCl
6
(ATPP=acetonyltriphenylphosphonium)
phase
was
designed
synthesized
by
rationally
choosing
emissive
organic
reagent
of
ATPPCl
non‐toxic
stable
ions
Sn
4+
,
Sb
3+
further
doped
into
to
tune
the
photoluminescence
with
external
self‐trapped
excitons
emission.
The
derived
shows
multi‐excitonic
centers
verified
optical
study
differential
charge‐density
from
density
functional
theory
calculations.
Incorporation
dopants
increasing
concentrations
induce
efficient
energy
transfer
therein,
thus
enhancing
quantum
yield
5.1
%
73.8
%.
emission
inspires
creation
decryption
leveraging
host
:
.
This
facilitates
application
employing
solution‐processable
excitation‐dependent
PL
properties.
Materials
capable
of
dynamic
persistent
luminescence
(PersL)
within
the
visible
spectrum
are
highly
sought
after
for
applications
in
display,
biosensing,
and
information
security.
However,
PersL
materials
with
eye-detectable
excitation-wavelength-dependent
characteristics
rarely
achieved.
Herein,
a
nonstoichiometric
compound
CaGa
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: May 21, 2024
Abstract
Stimuli‐responsive
luminescent
materials
have
attracted
much
research
attention
due
to
their
wide
application
potential
in
various
fields.
Typically,
the
family
of
hydrated
double
perovskite
A
2
M
III
X
5
·H
O
shows
unique
emission
color
transformation
between
and
dehydrated
complexes,
highlighting
advanced
anti‐counterfeiting.
Herein,
two
zero‐dimensional
perovskites
Cs
YbCl
3
6
,
are
reported
broad‐band
self‐trapped
exciton
recombination
can
be
realized
via
external
Sb
3+
doping.
Intriguingly,
transformed
counterpart
through
a
facile
methanol
treatment
at
room
temperature,
leading
from
yellow
green.
Notably,
green‐emissive
:Sb
delivers
high
photoluminescence
quantum
yield
67.3%.
Leveraging
advantages
obvious
methanol‐induced
used
field
high‐security‐level
Journal of Applied Polymer Science,
Journal Year:
2024,
Volume and Issue:
141(23)
Published: March 17, 2024
Abstract
Photochromic
inks
have
been
a
tempting
authentication
method
to
make
commercial
items
more
resistant
counterfeiting.
However,
recent
studies
shown
that
photochromic
major
drawbacks,
such
as
expensiveness
and
low
durability.
Herein,
we
report
the
development
of
new
nanofibers
for
cutting‐edge
anti‐counterfeiting
uses.
Lanthanide‐doped
strontium
aluminate
nanoparticles
(LSAN)
were
synthesized
immobilized
onto
electrospun
polyurethane
(PUNF).
Anti‐counterfeiting
materials
encapsulated
with
inorganic
agent
can
guarantee
photostability
LSAN
function
an
efficient
whereas
PUNF
hosting
matrix.
Both
reversibility
prepared
UV‐induced
LSAN@PUNF
found
be
rather
high.
Applying
varying
ratios
resulted
in
distinct
emission
properties
depending
on
content.
The
nanofibrous
films
showed
green
under
UV
illumination,
no
traces
detected
visible
daylight.
displayed
diameters
3–6
nm,
had
150–450
nm.
Transparency
was
indicated
by
excitation
peak
at
347
color
530
current
approach
presented
technology
prevent
forgery
products.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
12(30)
Published: Aug. 13, 2024
Abstract
Recently,
all‐inorganic
halide
double
perovskites
(DPs)
with
a
chemical
formula
of
Cs
2
B
I
III
X
6
have
been
emerging
as
shinning
star
to
be
used
in
modern
optoelectronic
devices,
due
their
unique
advantages
such
environmentally
friendly,
high
absorption
coefficient,
low
trap
densities,
tunable
bandgap,
variable
constituent
elements
and
valences
states
through
or
sites
engineering.
In
this
review,
first,
the
impact
cation
doping
on
electronic
structure
optical
properties
DPs
are
systematically
overviewed,
which
cover
several
key
issues
including
interconversion
between
direct
indirect
band
gaps,
enhancement
light
absorption,
promotion
exciton
localization,
elucidation
energy
transfer
mechanisms,
regulation
defect
density
improvement
both
stability
luminescence
efficiency.
Subsequently,
state‐of‐the‐art
research
activities
regarding
interesting
device
applications
discussed,
light‐emitting
diodes,
anticounterfeiting
encryption,
X‐ray
scintillators,
thermometry.
Finally,
existing
difficulties,
prospects,
directions
field
proposed.
