Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 26, 2024
Abstract
Chiral
organic
small
molecules
are
promising
for
circularly
polarized
light
(CPL)
detection
due
to
their
easy
modifiability,
strong
intermolecular
interactions,
and
straightforward
manipulation
of
the
transition
dipole
moments.
However,
they
often
exhibit
a
low
absorption
asymmetry
factor
(
g
abs
)
since
magnetic
moment
m
is
overshadowed
by
electric
μ
),
alignment
θ
not
optimized,
limiting
performance
CPL
photodetectors.
This
study
introduces
an
ortho
‐substitution
strategy
significantly
enhance
in
chiral
perylene
diimides
(PDIs)
tuning
crystal
packing
motif.
Incorporating
cyano
group
at
ortho‐position
markedly
reduces
angle
between
within
crystal,
thus
amplifying
.
The
fabricated
single‐crystal
film
devices
R
)‐4CN‐PDI‐Ph
demonstrated
superior
photodetecting
performance,
with
photocurrent
ph
0.362
—
three
times
larger
than
that
its
counterpart
)‐4PH‐PDI‐Ph.
These
findings
underscore
pivotal
role
molecular
stacking,
enhancing
detection,
deepening
understanding
structure‐performance
relationship
optoelectronics.
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 15, 2025
Precise
patterning
of
sensing
materials,
particularly
the
long-range-ordered
assembly
micro/nanostructures,
is
pivotal
for
improving
sensor
performance,
facilitating
miniaturization,
and
enabling
seamless
integration.
This
paper
examines
importance
interfacial
confined
in
patterning,
including
gas-liquid
liquid-liquid
assembly,
wettability-assisted
or
microstructure-assisted
solid-liquid
tip-induced
assembly.
The
application
capillary
bridge
technology
chemical
sensors,
flexible
electronics,
optoelectronics
highlighted.
advantages
include
ability
to
achieve
high-resolution
scalability,
material
arrangement
long-range
order.
It
is,
therefore,
an
ideal
processing
platform
next-generation
sensors.
Finally,
broad
prospects
this
miniaturization
integration
high-performance
multifunctional
sensors
are
discussed.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 26, 2025
Abstract
2D
Dion−Jacobson
(DJ)
chiral
perovskite
materials
exhibit
significant
promise
for
developing
high‐performance
circularly
polarized
light
(CPL)
photodetectors.
However,
the
inherently
thick
nature
of
DJ‐phase
single
crystal
limits
their
ability
to
differentiate
CPL
photons
with
two
opposite
polarization
states.
In
addition,
growth
thin
films
(SCTFs)
has
proven
challenging
due
strong
interlayer
electronic
coupling.
Here,
a
nucleation‐controlled
strategy
is
employed
grow
novel
[(
R
/
S
)‐3APr]PbI
4
)‐3APr
=
(
)‐3‐Aminopyrrolidine]
SCTFs
large
area,
low
thickness
and
hence
high
aspect
ratios.
Structural
photoluminescence
analyses
reveal
that
introducing
divalent
organic
cations
into
framework
reduce
distance,
resulting
in
exciton
binding
energy.
This
facilitates
charge
separation
transport.
The
SCTF
photodetector
showcases
excellent
detection
performance
anisotropy
factor
photocurrent
as
0.65,
responsivity
1.97
A
W
−1
,
detectivity
5.3
×
10
13
Jones,
3‐dB
frequency
2940
Hz,
demonstrating
its
potential
promising
candidate
CPL‐sensitive
approach,
therefore,
provides
advances
applications
sensitive
photodetection.
Inorganic Chemistry Frontiers,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
A
3D
perovskitoid
(NMPDA)Pb
2
I
4
Br
(NMPDA
=
N
-methyl
propane
diammonium)
with
strong
anisotropic
merits
was
constructed
via
the
incorporation
of
−
ions,
which
enables
photoconductivity
and
polarization-sensitive
photodetection.
Nature Communications,
Journal Year:
2025,
Volume and Issue:
16(1)
Published: March 14, 2025
Chiral
organic-inorganic
hybrid
metal
halides
as
promising
circularly
polarized
luminescence
(CPL)
emitter
candidates
hold
great
potential
for
high-definition
displays
and
future
spin-optoelectronics.
The
recent
challenge
lies
primarily
in
developing
high-performance
red
CPL
emitters.
Here,
coupling
the
f-f
transition
characteristics
of
trivalent
europium
ions
(Eu3+)
with
chirality,
we
construct
chiral
Eu-based
halides,
(R/S-3BrMBA)3EuCl6,
which
exhibit
strong
predictable
emission
large
photoluminescence
quantum
yield
(59.8%),
narrow
bandwidth
(≈2
nm),
long
lifetime
ms),
together
dissymmetry
factor
|glum|
1.84
×
10−2.
Compared
previously
reported
these
show
highest
brightness.
Furthermore,
degree
polarization
(R/S-3BrMBA)3EuCl6
can
be
manipulated
by
external
magnetic
field.
Particularly,
benefiting
from
field-generated
Zeeman
splitting
spin
mixing
at
exciton
states,
an
anomalously
positive
magneto-photoluminescence
was
observed
room
temperature.
This
work
provides
efficient
strategy
constructing
both
pure-red
It
also
opens
door
rare-earth
toward
optoelectronic
spintronic
applications.
perovskites
are
materials
luminescence.
Here
authors
present
leading
to
magneto-chiroptical
properties.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 30, 2025
Chiral
hybrid
metal-halide
perovskites
show
low-symmetry
crystal
structures,
large
Rashba
splitting,
spin-filtering,
and
strong
chiroptical
activity.
Circular
dichroism
circularly
polarized
photoluminescence
have
been
investigated
in
chiral
with
increasingly
distorted
structures.
Here,
we
report
the
fabrication
of
(R/S)-EBAPbI3
(EBA
=
α-ethylbenzylamine)
single
crystals,
which
possess
highly
octahedral
structures
a
high
angle
variance
value
∼68
degree2.
Using
control
conditions,
transfer
crystals
to
thin
films
achieve
different
orientation
preferences
that
induce
tunable
properties
their
heterostructures
PbI2
nanodomains,
characterize
situ
X-ray
diffraction
grazing-incidence
wide-angle
scattering
measurements.
transient
spectroscopies,
resolve
photoexcited
charge
carrier
dynamics
chirality
processes
such
down
cryogenic
temperatures.
We
observe
rapid
along
in-plane
(002)
facets
perovskite
phases
nanostructures
within
initial
few
picoseconds,
while
out-of-plane
occurs
at
slower
rate.
This
fast
process
leads
intensities
degrees
circular
polarization
emission
from
nanodomains
Our
findings
multidimensional
chiral-achiral
heterostructure
takes
advantage
controllable
offers
new
routes
for
future
spintronic
applications.
Metal
halide
perovskites
have
emerged
as
outstanding
X-ray
detection
absorption
candidates,
benefiting
from
their
excellent
carrier
mobility,
strong
radiation
capability,
and
ease
of
preparation.
However,
the
realization
highly
anisotropic
with
a
tunable
performance
has
rarely
been
investigated.
Two-dimensional
(2D)
chiral-polar
hybrid
natural
multiple
quantum
wells
(MQWs)
structure
bulk
photovoltaic
effect
(BPVE)
present
prospective
solution
to
meet
requirement
detection.
The
pair
2D
synthesized
in
this
work,
termed
(R-β-MPA)PAPbI4
(S-β-MPA)PAPbI4
(1R
1S,
MPA
=
methylphenethylamine
PA
propylamine),
aiming
achieve
unique
resulting
coupling
distinctive
MQWs
BPVE.
As
expected,
photodetectors
based
on
high-quality
single
crystals
1R
result
high
dichroism
ratio
(Imax/Imin
≈
7)
for
self-powered
polarized-light
Strikingly,
these
ratios,
reaching
up
9
under
irradiation.
This
work
reveals
correlation
between
specially
oriented
BPVE,
opening
new
possibilities
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 30, 2024
Abstract
State‐of‐the‐art
inverted
perovskite
solar
cells
(PSCs)
have
exhibited
considerable
promise
for
commercialization
due
to
their
prospective
stability.
However,
the
intricate
crystallization
of
halide
perovskite,
especially
multi‐component
perovskites,
not
only
distorts
surface
lattice
from
its
ideal
form
but
also
introduces
numerous
unsaturated
dangling
bonds
defects,
which
can
easily
lead
reduced
stability
and
poor
performance.
Herein,
a
engineering
is
developed
by
coupling
ions
regulating
ion
bonding
lengths/angles
achieve
efficient
stable
PSCs.
The
renovated
eliminates
shallow/deep
level
defects
on
enhances
photo/thermal
materials.
Moreover,
contributes
uniform
potential
surface,
improves
energy‐level
alignment
at
interfaces
C
60
carrier
transport
layer,
enhancing
charge
extraction
transportation.
Finally,
champion
PSC
delivers
an
impressive
efficiency
25.82%
(certified
25.5%).
these
PSCs
exhibit
excellent
operational
stability,
retaining
94%
initial
after
more
than
≈1
000h
maximum
power
point
test.
Chemical Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
A
3D
perovskite
analog
is
constructed
by
using
hydrogen
bond
to
reduce
electrostatic
repulsion
of
two
monovalent
cations.
The
study
highlights
the
potential
overcome
cation
selection
limitations
on
novel
perovskite-like
materials.
