Advanced Materials,
Год журнала:
2024,
Номер
36(16)
Опубликована: Янв. 10, 2024
Conventional
circularly
polarized
light
(CPL)
detectors
necessitate
several
optical
elements,
posing
difficulties
in
achieving
miniature
and
integrated
devices.
Recently
developed
organic
CPL
require
no
additional
elements
but
usually
suffer
from
low
detectivity
or
asymmetry
factor
(g-factor).
Here,
an
detector
with
excellent
a
high
g-factor
is
fabricated.
By
employing
inverted
quasi-planar
heterojunction
(IPHJ)
structure
incorporating
liquid
crystal
film,
outstanding
of
1.62
developed.
Unfavorable
charge
injection
effectively
suppressed
by
the
IPHJ
structure,
which
reduces
dark
current
photodetector.
Consequently,
left
6.16
×
10
Angewandte Chemie International Edition,
Год журнала:
2021,
Номер
60(36), С. 20021 - 20026
Опубликована: Июль 5, 2021
Abstract
The
introduction
of
chirality
into
organic–inorganic
hybrid
perovskites
(OIHPs)
is
expected
to
achieve
excellent
photoelectric
and
nonlinear
materials
related
circular
dichroism.
Owing
the
existence
asymmetric
center
intrinsic
in
chiral
OIHPs,
different
efficiencies
second
harmonic
generation
(SHG)
signal
occurs
when
circularly
polarized
light
(CPL)
with
phases
passes
through
crystal,
which
defined
as
dichroism
(SHG‐CD).
Here,
SHG‐CD
effect
developed
bulk
single
crystals
one‐dimensional
(1D)
[(
R
/
S
)‐3‐aminopiperidine]PbI
4
.
It
first
time
that
CPL
distinguished
using
chirality‐dependent
OIHPs
crystals.
Such
technology
extends
detection
range
near
infrared
region
(NIR).
In
this
way,
anisotropy
factor
(g
)
high
0.21.
Advanced Functional Materials,
Год журнала:
2023,
Номер
34(6)
Опубликована: Окт. 27, 2023
Abstract
Halide
perovskites,
in
the
form
of
thin
films
and
colloidal
nanocrystals,
have
recently
taken
semiconductor
optoelectronics
research
by
storm,
emerged
as
promising
candidates
for
high‐performance
solar
cells,
light‐emitting
diodes
(LEDs),
lasers,
photodetectors,
radiation
detectors.
The
impressive
optical
optoelectronic
properties,
along
with
rapid
increase
efficiencies
cells
LEDs,
greatly
attracted
researchers
across
many
disciplines.
However,
most
advances
made
so
far
terms
preparation
(colloidal
nanocrystals
films),
devices
highest
are
based
on
Pb‐based
halide
which
raised
concerns
over
their
commercialization
due
to
toxicity
Pb.
This
has
triggered
search
lower‐toxicity
Pb‐free
perovskites
led
significant
progress
last
few
years.
In
this
roadmap
review,
different
expertise
joined
together
summarize
latest
progress,
outstanding
challenges,
future
directions
perovskite
regarding
synthesis,
spectroscopy,
devices,
guide
currently
working
area
well
those
that
will
join
field
future.
Angewandte Chemie International Edition,
Год журнала:
2021,
Номер
60(39), С. 21434 - 21440
Опубликована: Июль 28, 2021
Abstract
Through
the
incorporation
of
various
halogen‐substituted
chiral
organic
cations,
effects
molecules
on
chiroptical
properties
hybrid
organic–inorganic
perovskites
(HOIPs)
are
investigated.
Among
them,
HOIP
having
a
Cl‐substituted
cation
exhibits
highest
circular
dichroism
(CD)
and
polarized
luminescence
(CPL)
intensities,
indicating
existence
largest
rotatory
strength,
whereas
F‐substituted
HIOP
shows
weakest
intensities.
The
observed
modulation
can
be
correlated
to
varied
magnetic
transition
dipole
HOIPs,
which
is
sensitive
d‐spacing
between
inorganic
layers
halogen–halogen
interaction
cations
sheets.
These
counteracting
meet
optimal
CD
CPL
intensity
with
chlorine
substitution,
rendering
strength
HOIPs
arranged
in
order
(ClMBA)
2
PbI
4
>(BrMBA)
>(IMBA)
>(MBA)
>(FMBA)
.
Angewandte Chemie International Edition,
Год журнала:
2021,
Номер
60(46), С. 24549 - 24557
Опубликована: Авг. 23, 2021
Abstract
The
occurrence
and
transmission
of
chirality
is
a
fascinating
characteristic
nature.
However,
the
intermolecular
efficiency
circularly
polarized
luminescence
(CPL)
remains
challenging
due
to
poor
through‐space
energy
transfer.
We
report
unique
CPL
from
inducing
achiral
acceptor
emit
within
specific
liquid
crystal
(LC)‐based
system
through
fluorescence
resonance
transfer
(
C
‐FRET),
wherein
luminescent
cholesteric
LC
employed
as
donor,
rationally
designed
long‐wavelength
aggregation‐induced
emission
(AIE)
fluorophore
acts
well‐assembled
acceptor.
In
contrast
photon‐release‐and‐absorption,
channel
‐FRET
highly
dependent
upon
in
intrinsic
chiral
assembly
LC,
verified
by
deliberately
separating
donor
keep
it
far
beyond
distance.
This
mode
provides
de
novo
strategy
concept
for
high‐level
information
processing
applications
such
high‐density
data
storage,
combinatorial
logic
calculation,
multilevel
encryption
decryption.
Advanced Materials,
Год журнала:
2022,
Номер
34(51)
Опубликована: Сен. 21, 2022
Direct
detection
of
circularly
polarized
light
(CPL)
is
a
challenging
task
due
to
limited
materials
and
ambiguous
structure-property
relationships
that
lead
low
distinguishability
the
helicities.
Perovskite
ferroelectric
semiconductors
incorporating
chirality
provide
new
opportunities
in
dealing
with
this
issue.
Herein,
pair
2D
chiral
perovskite
ferroelectrics
reported,
which
have
enhanced
CPL
performance
interplays
among
lattice,
photon,
charge,
spin,
orbit.
The
chirality-transfer-induced
chiral&polar
phase
enhances
asymmetric
nature
photoactive
sublattice
achieves
switchable
self-powered
via
bulk
photovoltaic
effect.
single-crystal-based
device
exhibits
CPL-sensitive
under
430
nm
an
factor
0.20
for
left-
right-CPL
differentiation,
about
two
times
pure
counterparts.
ascribed
Rashba-Dresselhaus
effect
originates
from
inversion
asymmetry
strong
spin-orbit
coupling,
shown
large
Rashba
coefficient,
demonstrated
by
density
functional
theory
calculation
excited
photoluminescence
measurement.
These
results
perspectives
on
direct
ferroelectrics-based
chiroptics
spintronics.
ACS Nano,
Год журнала:
2022,
Номер
16(2), С. 2682 - 2689
Опубликована: Фев. 2, 2022
Circularly
polarized
light
(CPL)
has
considerable
technological
potential,
from
quantum
computing
to
bioimaging.
To
maximize
the
opportunity,
high
performance
photodetectors
that
can
directly
distinguish
left-handed
and
right-handed
circularly
are
needed.
Hybrid
organic-inorganic
perovskites
containing
chiral
organic
ligands
an
emerging
candidate
for
active
material
in
CPL
photodetecting
devices,
but
current
studies
suggest
there
be
a
trade-off
between
ability
differentially
absorb
photocurrent
responsivity
devices.
Here,
we
report
detector
based
on
quasi
two-dimensional
(quasi-2D)
perovskite
films.
We
find
it
is
possible
generate
materials
where
circular
dichroism
(CD)
comparable
both
2D
quasi-2D
films,
while
of
photodetector
improves
latter.
Given
this,
able
showcase
exhibits
dissymmetry
factor
0.15
15.7
A
W-1.
believe
our
data
further
advocates
potential
CPL-dependent
photonic
technologies.
National Science Review,
Год журнала:
2022,
Номер
10(2)
Опубликована: Ноя. 2, 2022
ABSTRACT
Molecular
ferroelectrics
have
gradually
aroused
great
interest
in
both
fundamental
scientific
research
and
technological
applications
because
of
their
easy
processing,
light
weight
mechanical
flexibility.
Hybrid
organic–inorganic
perovskite
(HOIPFs),
as
a
class
molecule-based
ferroelectrics,
diverse
functionalities
owing
to
unique
structure
become
hot
spot
molecular
research.
Therefore,
they
are
extremely
attractive
the
field
ferroelectrics.
However,
there
seems
be
lack
systematic
review
design,
performance
potential
applications.
Herein,
we
recent
development
HOIPFs
from
lead-based,
lead-free
metal-free
perovskites,
outline
versatility
these
including
piezoelectricity
for
energy-harvesting
optoelectronic
properties
photovoltaics
detection.
Furthermore,
perspective
view
challenges
future
directions
is
also
highlighted.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(39)
Опубликована: Авг. 14, 2023
Harnessing
the
potential
of
thermally
activated
delayed
fluorescence
(TADF)
and
room
temperature
phosphorescence
(RTP)
is
crucial
for
developing
light-emitting
diodes
(LEDs),
lasers,
sensors,
many
others.
However,
effective
strategies
in
this
domain
are
still
relatively
scarce.
This
study
presents
a
new
approach
to
achieving
highly
efficient
deep-blue
TADF
(with
PLQY
25
%)
low-energy
orange
RTP
90
through
fabrication
lead-free
hybrid
halides.
class
monomeric
dimeric
0D
antimony
halides
can
be
facilely
synthesized
using
bottom-up
solution
process,
requiring
only
few
seconds
minutes,
which
offer
exceptional
stability
nontoxicity.
By
leveraging
adaptable
molecular
arrangement
crystal
packing
modes,
demonstrate
ability
self-assemble
into
regular
1D
microrod
2D
microplate
morphologies.
self-assembly
facilitated
by
multiple
non-covalent
interactions
between
inorganic
cores
organic
shells.
Notably,
these
microstructures
exhibit
outstanding
polarized
luminescence
function
as
low-dimensional
optical
waveguides
with
remarkably
low
optical-loss
coefficients.
Therefore,
work
not
pioneering
demonstration
halides,
but
also
introduces
micro/nanostructures
that
hold
promising
applications
white
LEDs
photonic
systems.