Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(25)
Опубликована: Апрель 10, 2024
Abstract
Circularly
polarized
luminescence
(CPL)‐active
molecular
materials
have
drawn
increasing
attention
due
to
their
promising
applications
for
next‐generation
display
and
optoelectronic
technologies.
Currently,
it
is
challenging
obtain
CPL
with
both
large
dissymmetry
factor
(
g
lum
)
high
quantum
yield
Φ
).
A
pair
of
enantiomeric
N
C‐type
Pt(II)
complexes
L/D
)‐
1
modified
chiral
Leucine
methyl
ester
are
presented
herein.
Though
the
solutions
these
CPL‐inactive,
spin‐coated
thin
films
exhibit
giantly‐amplified
circularly
phosphorescences
|
0.53
at
560
nm
air
~50
%,
as
well
appealing
circular
dichroism
(CD)
signals
maximum
absorption
abs
0.37–0.43
480
nm.
This
superior
performance
benefits
from
hierarchical
formation
crystalline
fibrillar
networks
upon
spin
coating.
Comparative
studies
another
2
a
symmetric
C
coordination
mode
suggest
that
asymmetric
favorable
efficient
exciton
delocalization
amplify
performance.
Optical
in
CPL‐contrast
imaging
inducing
CP
light
generation
achiral
emitters
common
light‐emitting
diode
lamps
been
successfully
realized.
ACS Nano,
Год журнала:
2024,
Номер
18(24), С. 15888 - 15897
Опубликована: Июнь 6, 2024
Distinguished
from
traditional
physical
unclonable
functions
(PUFs),
optical
PUFs
derive
their
encoded
information
the
properties
of
materials,
offering
distinct
advantages,
including
solution
processability,
material
versatility,
and
tunable
luminescence
performance.
However,
existing
research
on
has
predominantly
centered
visible
photoluminescence,
while
advanced
based
higher-level
covert
light
remain
unexplored.
In
this
study,
we
present
utilization
near-infrared
circularly
polarized
(NIR-CPL).
This
interesting
property
is
achieved
by
incorporating
Yb-doped
metal
halide
perovskite
nanocrystals
(Yb-PeNCs)
possessing
NIR
emission
into
chiral
imprinted
photonic
(CIP)
films.
By
employing
a
solvent
immersion
method,
successfully
integrated
Yb-PeNCs
these
CIP
films,
thereby
creating
an
optically
surface.
The
resulting
NIR-CPL
adds
layer
security
to
PUF
systems.
These
findings
underscore
potential
solution-processable
films
play
pivotal
role
in
advancing
next
generation
PUFs.
Advanced Optical Materials,
Год журнала:
2024,
Номер
12(19)
Опубликована: Март 14, 2024
Abstract
1D
photonic
crystals
(1DPCs)
with
hierarchically
structured
lamellar
periodic
frameworks
that
enable
precise
control
of
light‐matter
interactions
and
contribute
robust
structural
colors
represent
a
groundbreaking
advancement
in
optical
materials.
The
microstructural
characteristics
the
constituent
material
properties
these
materials
play
pivotal
roles
determining
their
performance
functionality.
In
recent
years,
diverse
array
novel
structures
crafted
from
various
emerged,
showcasing
tremendous
potential
advanced
applications.
This
article
provides
an
in‐depth
review
developments
1DPCs,
emphasizing
morphological
designs,
fabrication
strategies,
detail,
1DPCs
featuring
distinct
geometrical
morphologies,
including
lamellar,
helical,
fibrous,
spherical,
nanochained
are
systematically
introduced,
highlighting
unique
arising
microstructures.
Then,
methods,
involving
some
innovative
techniques
utilizing
standing‐wave
optics,
UV
dual
photopolymerization,
inkjet
printing,
succinctly
summarized
for
constructing
different
by
using
building
Subsequently,
typical
application
examples
listed
discussed
visual
sensing,
intelligent
displays,
anti‐counterfeiting
technology,
pigments,
devices.
Finally,
passage
addresses
current
challenges
presents
forward‐looking
perspective
on
future
1DPCs.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(7), С. 9323 - 9332
Опубликована: Фев. 9, 2024
Chiral
luminescent
liquid
crystals
have
attracted
widespread
attention
from
researchers
due
to
their
unique
advantages
in
constructing
circularly
polarized
(CPL)
materials
with
large
asymmetry
factor
(glum)
values.
However,
how
effectively
prepare
nondoped
CPL
chiral
remains
a
challenge.
In
this
article,
we
developed
an
effective
and
universal
method
crystal
materials.
To
achieve
our
strategy,
copolymerized
monomer
M0Mt
α-cyanostilbene-based
monomers
MmPVPCN
(m
=
6,
8,
10)
bearing
different
flexible
spacer
lengths
obtain
series
of
copolymers
poly(MmPVPCN(x)-co-M0Mt(y)).
Under
the
induction
component,
α-cyanostilbene
component
assembles
form
crystals.
Meanwhile,
also
exhibits
aggregation-induced
emission
enhancement
characteristics.
Therefore,
help
selective
reflection
effect
crystals,
copolymer
films
can
emit
efficient
CPL.
For
poly(M8PVPCN(0.85)-co-M0Mt(0.15)),
glum
solid
luminescence
quantum
yield
−2.61
×
10–2
25.04%,
respectively.
addition,
by
altering
chemical
structure
copolymers,
phase
be
controlled,
thereby
regulating
properties.
Advanced Optical Materials,
Год журнала:
2024,
Номер
12(19)
Опубликована: Апрель 30, 2024
Abstract
Functional
materials
that
exhibit
circularly
polarized
luminescence
(CPL)
have
shown
immense
potential
in
applications
such
as
3D
optical
displays
and
advanced
information
encryption.
However,
facile
efficient
regulation
of
the
multiple
emission
properties
chiral
systems
has
remained
a
challenge
due
to
scarcity
suitable
complexity
systems.
Herein,
CPL
platform
is
fabricated
by
helical
co‐assembly
an
aldehyde‐functionalized
fluorane
dye
(Rhodol‐CHO,
6′‐(diethylamino)‐3′‐hydroxy‐3‐oxo‐3H‐spiro[isobenzofuran‐1,9′‐xanthene]‐4′‐carbaldehyde)
liquid
crystals,
which
can
efficiently
combine
stimuli‐responsive
characteristics
high
activity.
By
introducing
acid,
base,
compounds
containing
primary
amino
(─NH
2
)
groups,
property
system
be
easily
modified.
The
obtained
apparent
asymmetry,
with
g
lum
values
reaching
0.54–0.75).
Further,
these
modules
are
successfully
applied
multi‐mode
encryption,
highlighting
their
practical
utility.
Therefore,
this
study
presents
novel
strategy
for
developing
diverse
behaviors
based
on
simple‐designed
platform,
advancing
further
materials.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 28, 2025
Abstract
In
this
study,
the
development
of
first
fully‐organic
circularly
polarized
near‐infrared
organic
light–emitting
diode
(CP‐NIR‐OLED)
is
presented.
The
devices
are
made
by
using
a
co‐assembled
active
layer
consisting
commercially
available
NIR‐emitting
indacenodithienothiophene‐based
molecule
(ITIC)
and
chiral
inducer.
Here,
ITIC,
which
traditionally
utilized
as
non‐fullerene
acceptor
in
photovoltaics
for
its
superior
characteristics,
demonstrated
to
act
an
effective
NIR
emitter
solution‐processed
OLEDs.
By
incorporating
additive
into
layer,
emission
successfully
polarized,
achieving
CP‐NIR‐OLEDs
with
dissymmetry
values
up
0.074
maximum
radiance
1.65
Wsr
−1
m
−2
.
Additionally,
study
shows
that
manipulating
position
radiative
exciton
recombination
zone
within
circular
polarization
sign
can
be
switched,
while
maintaining
even
enhancing
device
performance.
This
also
exhibit
remarkable
operational
stability,
indicating
their
potential
short‐term
applications.
work
provides
significant
step
forward
CP‐OLEDs
opens
new
avenues
use
advanced
optoelectronic
devices.
