Advanced Optical Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 4, 2025
Abstract
Low‐dimensional
metal
halides
have
emerged
as
promising
anti‐counterfeiting
materials.
However,
achieving
a
multi‐mode
and
multi‐color
system
in
remains
challenging.
In
this
study,
copper‐halide
(TBP)
2
Cu
4
Br
6
(TBP
+
=
C
16
H
36
P
)
single
crystals
are
synthesized
using
cooling
crystallization
method,
which
exhibits
efficient
dual‐band
emissions
(542
708
nm),
large
Stokes
shifts
(282
330
high
photoluminescence
quantum
yield
(PLQY)
of
92.7%
for
542
nm.
These
exceptional
properties
attributed
to
the
unique
0D
structure
crystals,
facilitates
formation
two
different
self‐trapped
excitons
(STEs).
Furthermore,
based
on
,
digital
integrated
is
designed
with
Morse
code
information
encryption,
demonstrating
applications
security
anti‐counterfeiting.
This
work
not
only
illustrates
an
emitter
copper
but
also
paves
way
systems.
Applied Physics Reviews,
Journal Year:
2024,
Volume and Issue:
11(1)
Published: Jan. 24, 2024
Flat-panel
x-ray
scintillators
with
a
high
spatial
resolution
at
low
radiation
dose
rate
are
desirable
for
efficient
imaging
applications
in
medical
diagnostics,
security
inspection,
and
nondestructive
inspection.
To
promote
the
progress
of
technologies,
it
is
great
interest
to
explore
transparent
reduced
light
scattering,
yields,
uniform
radioluminescence.
Herein,
we
design
prepare
novel
lead-free
(C12H28N)2Cu2I4
metal
halide
featuring
luminescent
efficiency
white
emission
benefiting
from
double
self-trapped
exciton
mechanism,
which
enable
not
only
match
response
semiconductor-based
sensors
but
also
enhance
yields
decrease
exposed
doses
objects.
Furthermore,
transparent,
flexible
large
areas
20.25
cm2
demonstrate
an
outstanding
scintillation
performance
including
19.8
lp
mm−1
ultralow
detection
limit
28.39
nGyair
s−1,
∼4
times
higher
194
lower
than
typical
values
imaging,
respectively.
This
work
provides
new
route
promising
alternatives
broadband
opportunity
develop
technology.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(38)
Published: April 25, 2024
Abstract
Inorganic
scintillators
play
a
pivotal
role
in
diverse
fields
like
medical
imaging,
nondestructive
detection,
homeland
security,
and
high‐energy
physics.
However,
traditional
inorganic
encounter
challenges
such
as
high
fabrication
costs
low
light
yield.
Recently,
low‐dimensional
metal
halide
(LDMHS)
have
witnessed
rapid
progress,
owing
to
their
distinctive
crystal
structure
superior
radioluminescence
performance.
Herein,
an
overview
of
recent
advancements
proposed
instructive
pathways
for
achieving
high‐performance
LDMHS
is
provided.
First,
the
scintillation
physical
mechanism
emphasis
on
essential
requirements
applications
are
elucidated.
Furthermore,
classified
according
B‐site
cations,
respective
characteristics
introduced.
This
encompasses
understanding
structure‐property
relationships
routes
rules
optimizing
Finally,
persisting
this
burgeoning
field
potential
research
directions
future
exploration
discussed.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(8), P. 10325 - 10334
Published: Feb. 15, 2024
In
modern
society,
the
investigation
of
highly
efficient
photoluminescent
bulk
materials
with
excitation-induced
tunable
multicolor
luminescence
and
multiexciton
generation
(MEG)
is
great
significance
to
information
security
application
optoelectronic
devices.
this
study,
two
Cu-based
halide
crystals
(C4H10NO)4Cu2Br5·Br
(C4H10NO)4Cu2I5·I·H2O,
respectively,
one-dimensional
structures
were
grown
by
a
solvent
evaporation
method.
Unexpectedly,
(C4H10NO)4Cu2I5·I·H2O
displayed
dual-color
luminescence;
one
band
brilliant
green-yellow
emission
centered
at
547
nm
high
photoluminescence
quantum
yield
(PLQY)
up
169.67%,
other
red
695
PLQY
75.76%.
Just
as
importantly,
exhibits
strong
broadband
561
under
broad
excitation
ranging
from
252
350
nm,
long
PL
decay
lifetime
106.9
μs,
an
ultrahigh
198.22%.
These
represent
first
examples
1D
Cu(I)-based
halides
that
have
exceeding
100%.
Combining
unusual
characteristics
theoretical
calculations
reveals
MEG
contributes
>
100%,
can
be
ascribed
[Cu2I5]3–
cluster-centered
emission.
Additionally,
encryption
method
was
designed
based
on
Morse
Code.
The
LED
devices
fabricated
using
appear
lead
promising
applications
in
solid-state
lighting.
This
work
extends
catalog
high-performance
luminescent
also
promotes
prospects
low-dimensional
copper-based
optoelectronics.
Advanced Optical Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 13, 2025
Abstract
When
used
as
the
active
layers—either
a
light
absorber
in
photovoltaic
devices
or
an
electroluminescent
material
light‐emitting
devices—lead‐free
perovskites
significantly
impact
performance
of
optoelectronic
devices.
This
study
focuses
on
antimony‐based
perovskites,
which
are
promising
for
lighting
applications.
These
types
enable
formation
self‐trapped
excitons
(STEs)
with
higher
dissociation
energy
than
lead‐based
generate
lower
energy.
The
(CH
3
NH
)
Sb
2
I
9
crystals
synthesized
using
two
methods,
resulting
distinct
spatial
configurations
–
dimer
and
dimer/layered
mixtures,
each
exhibiting
unique
structural
spectroscopic
properties,
revealed
by
comprehensive
multi‐parametric
complementary
analyses.
Their
emissive
properties
underscore
efficiency
STE
photoluminescence,
driven
electron–phonon
interactions
influenced
Sb‐Sb
distances
powder,
whether
dispersed
polymethyl‐methacrylate
solution.
phase
transition
from
monoclinic
to
hexagonal
(dimer)
trigonal
(layered)
structures
enabled
tuning
optical
direct
correlation
electrical
features.
photoluminescence
behavior
STEs,
analyzed
conjunction
Raman
spectroscopy,
elucidates
dynamic
process
electron‐phonon
coupling
effects
(face‐capping
Sb–I
octahedra)
layered
(corner‐sharing
crystallographic
structures.
