Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 12, 2024
Abstract
Room
temperature
phosphorescence
(RTP)
materials
are
of
significant
attentions
due
to
their
unique
optical
properties
and
potential
applications
in
anti‐counterfeiting
information
security.
However,
single
spatial
resolution
decryption
methods
fail
meet
high‐level
security
demands.
A
novel
dual‐mode
encryption
strategy
based
on
self‐trapped
exciton
(STE)
fluorescence
is
proposed.
By
introducing
ns
2
metal
ions
into
the
zero‐dimensional
organic–inorganic
hybrid
halide
(Ph
3
S)
SnCl
6
,
energy
transfer
pathways
from
S
1
T
n
levels
STEs
constructed,
enabling
precise
control
performance.
This
material
exhibited
STE
fluorescence‐phosphorescence
with
different
afterglow
time,
which
can
be
utilized
develop
high‐performance
time‐resolved
cryptographic
systems.
Femtosecond
transient
absorption
experiments
indicated
that
rate
significantly
affected
characteristics
long
materials.
The
this
systems
demonstrated,
enhancing
through
multi‐level
providing
a
new
avenue
for
advanced
Materials Horizons,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Metal
halides
are
widely
applied
in
solid-state
lighting
(SSL),
optoelectronic
devices,
information
encryption,
and
near-infrared
(NIR)
detection
due
to
their
superior
photoelectric
properties
tunable
emission.
However,
single-component
phosphors
that
can
be
efficiently
excited
by
light-emitting
diode
(LED)
chips
cover
both
the
visible
(VIS)
NIR
emission
regions
still
very
rare.
To
address
this
issue,
(TPA)2ZnBr4:Sn2+/Mn2+
(TPA
=
[(CH3CH2CH2)4N]+)
were
synthesized
using
solvent
evaporation
method.
The
Sn2+
doping
significantly
enhances
luminescence
of
(TPA)2ZnBr4,
shifts
weak
blue
light
efficient
emissions
red
zones.
Spectroscopic
studies
density
functional
theory
(DFT)
calculations
reveal
attributed
different
levels
3P1-1S0
[SnBr4]2-
tetrahedron
caused
Jahn-Teller
distortion.
More
importantly,
energy
transfer
from
Mn2+
enables
ultra-broadband
VIS-NIR
across
400-1000
nm
range,
with
excitation-dependent
characteristics.
These
suggest
has
great
potential
as
a
high-performance,
luminescent
material
for
applications
general
lighting,
source,
anti-counterfeiting
labels.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 1, 2025
Abstract
In
this
study,
a
simple
and
rapid
strategy
is
developed
for
the
gram‐scale
synthesis
of
zinc(II)
halide
complexes
with
ultralong
afterglow
under
mild
conditions.
Crystalline,
high‐purity
are
synthesized
using
N
‐methylbenzimidazole
(
Bz
)
common
zinc
salts
(ZnX
2
,
X
=
Cl,
Br,
I)
as
cheap
industrial
raw
materials
by
stirring
at
room
temperature
atmospheric
pressure.
By
exploiting
steric
effect
terminal‐coordinated
halogen
ions
to
regulate
arrangements
ligands
in
structure
complexes,
namely
cis
‐butterfly,
trans
cross
‐arrangement,
completely
differentiated
stacking
modes
obtained.
Zn(Bz)Cl
‐butterfly‐shaped
arrangement
has
longest
room‐temperature
phosphorescence
(RTP)
lifetime
(505.01
ms
298
K)
long
up
1.4
s.
This
study
proposes
first
time
use
end
group
coordination
fluorophores
within
resulting
considerably
improved
RTP
afterglow,
thus
providing
new
platform
large‐scale
afterglow.
The
development
of
charge
transfer
materials
have
been
extensively
studied
in
recent
years
owing
to
their
potential
applications
the
field
photodetector,
photocatalytic
and
solid-state
lighting.
Herein,
assembly
acridine
(AD)
organic
cations
[ZnCl4]2-
anions
afforded
one
organic–inorganic
hybrid
complex
[(AD)2(ZnCl4)]
(1),
which
can
be
facilely
synthesized
ethanol
solution
at
room
temperature
for
a
few
minutes.
alternately
arranged
AD
cation
π-conjugated
chains
inorganic
anion
tetrahedrons
enable
this
characteristic.
It
shows
bright
green
light
emission
with
long
lifetime
16.31
ns
quantum
yield
53%.
Theoretical
calculations
provided
detailed
energy
level,
band
gap
distribution
information
1,
further
certified
its
behavior.
Successful
fabrication
light-emitting
diode
(LED)
device
making
perfect
candidate
lighting
material.
Organic–inorganic
metal
halides
(OIMHs)
exhibiting
superior
optoelectronic
properties
have
shown
broad
applications
in
sensing,
photovoltaic
devices,
information
storage,
and
biological
imaging.
Compared
with
pure
inorganic
or
organic
materials,
OIMHs
are
distinguished
by
their
hybrid
feature,
processability
of
components
robustness
units,
as
well
plentiful
luminescent
sources
derived
from
ligands,
self‐trapped
excitons
(STEs)
lattices,
the
energy
transfer
between
species.
Thereinto,
chemical
composition
tunability
component,
ions,
halogen
provides
multiple
adjustable
sites
to
tailor
structures
physicochemical
properties.
However,
how
realizing
effective
tunable
luminescence
for
desired
through
rational
regulation
has
become
a
challenge.
In
this
review,
starting
structurally
OIMHs,
feasible
methods
regulating
summarized,
which
include
change
components,
dimensionality
configurations
species,
heterometal
systematic
multisite
fine‐tuning
based
on
specific
matrix.
Finally,
challenges
synthesize
promising
performance
discussed.
Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 17, 2025
Abstract
Metal
halide
perovskites
have
attracted
much
attention
due
to
their
properties
and
wide
applications
in
optoelectronic
devices.
B‐site
ion
substitution,
especially
heterovalency
is
proven
be
one
of
the
practical
approaches
modulate
lattice
structure
improve
physicochemical
properties.
Here,
bandgap
modulation
all‐inorganic
CsPbX
3
are
achieved
by
substituting
Pb
2+
with
Bi
3+
.
A
series
CsPb
1‐
x
Br
(0
≤
1)
microplates
values
precisely
tuned
prepared
a
chemical
vapor
deposition
(CVD)
method.
The
varies
from
single
crystal
CsPbBr
cubic
Cs
2
9
hexagonal
structure.
Correspondingly,
three
photoluminescence
(PL)
bands
gradually
emerge
during
substituting:
green,
blue,
broad
red‐to‐near‐infrared
emission.
From
micro‐area
spectra
as
function
excitation
power
temperature,
combined
time‐resolved
PL
characterization,
emission
confirmed
band‐edge
self‐trapped
excitons
(STEs)
density
functional
theory
(DFT)
calculations,
STE
0.9
0.1
highly
related
defect
contributed
bromide
vacancy
substitution
ions.
This
study
paves
new
way
for
expanding
spectral
range
perovskite
emitters
even
preparing
white
light‐emitting
Inorganic Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 18, 2025
Multisite
modulation
for
organic-inorganic
hybrid
metal
halides
(OIMHs)
plays
an
important
role
in
the
optimization
of
their
photophysical
performance.
Herein,
we
proposed
organic
cation
modification
strategy
on
phosphorus
sites
based
1,2-Bis(diphenylphosphino)ethane
(DPPE)
by
a
simple
one-pot
solvothermal
method.
Three
zero-dimensional
(0D)
manganese-based
OIMHs,
two
novel
MdppeMnCl4·H2O
and
EdppeMnCl4,
as
well
byproduct
[Mn(dppeO2)3][MnCl4]
were
obtained
(Mdppe
=
methyl-coordinated
with
DPPE;
Edppe
ethyl-coordinated
dppeO2
is
oxidation
DPPE).
All
samples
possess
four-coordinated
[MnCl4]2-
polyhedron,
while
contains
another
six-coordinated
[Mn(dppeO2)3]2+
complex.
According
to
relevant
optical
measurements,
EdppeMnCl4
both
show
bright
green
emissions
photoluminescence
quantum
yields
55.66%
80.42%,
respectively.
By
contrast,
shows
orange
emission
that
confirmed
be
associated
Mn2+
ions
temperature-dependent
PL
spectra.
Based
good
stability
solution
processability
luminescent
ink
was
developed
potential
application
display
information
encryption
fields.
The
unique
this
work
opens
up
ways
designing
developing
OIMHs
extends
prospects
halides.
Chemical Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Tuning
Mn
2+
doping
in
the
novel
1D
hybrid
metal
halide
enables
afterglow
color
transitions
from
yellow-green
to
yellow,
orange,
and
red,
resulting
efficient
energy
transfer
stable
organic
triplet
states
4
T
1
level
of
dopants.
