Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(41)
Published: Aug. 23, 2023
Due
to
the
pronounced
anisotropic
response
circularly
polarized
light,
chiral
hybrid
organic-inorganic
metal
halides
have
been
regarded
as
promising
candidates
for
application
in
nonlinear
chiroptics,
especially
second-harmonic
generation
circular
dichroism
(SHG-CD)
effect.
However,
designing
novel
lead-free
with
large
anisotropy
factors
and
high
laser-induced
damage
thresholds
(LDT)
of
SHG-CD
remains
challenging.
Herein,
we
develop
first
germanium
halide,
(R/S-NEA)3
Ge2
I7
⋅H2
O
(R/S-NGI),
systematically
investigated
its
linear
chiroptical
properties.
S-NGI
R-NGI
exhibit
(gSHG-CD
)
0.45
0.48,
respectively,
along
a
LDT
38.46
GW/cm2
;
these
were
highest
values
among
reported
halides.
Moreover,
effective
second-order
optical
coefficient
could
reach
up
0.86
pm/V,
which
was
2.9
times
higher
than
that
commercial
Y-cut
quartz.
Our
findings
facilitate
new
avenue
toward
halides,
their
implementation
applications.
Science,
Journal Year:
2021,
Volume and Issue:
371(6534), P. 1129 - 1133
Published: March 11, 2021
Spin
injection
sans
magnetism
Light-emitting
diodes
(LEDs)
that
emit
circularly
polarized
light
(spin-LEDs)
have
potential
applications
in
three-dimensional
displays,
bioencoding,
and
tomography.
The
requisite
spin
polarization
of
the
charge
carriers
is
usually
achieved
with
ferromagnetic
contacts
applied
magnetic
fields,
but
Kim
et
al.
report
on
a
room-temperature
spin-LED
relies
instead
chiral-induced
selectivity
organic
layer.
This
layer
selectively
injected
spin-polarized
holes
into
metal
halide
perovskite
nanocrystals,
where
they
radiatively
recombined
unpolarized
electrons
an
efficiency
2.6%.
Science
,
this
issue
p.
1129
Acta Physico-Chimica Sinica,
Journal Year:
2021,
Volume and Issue:
0(0), P. 2108017 - 0
Published: Jan. 1, 2021
Abstract:
Research
on
two-dimensional
(2D)
materials
has
been
explosively
increasing
in
last
seventeen
years
varying
subjects
including
condensed
matter
physics,
electronic
engineering,
science,
and
chemistry
since
the
mechanical
exfoliation
of
graphene
2004.
Starting
from
graphene,
2D
now
have
become
a
big
family
with
numerous
members
diverse
categories.
The
unique
structural
features
physicochemical
properties
make
them
one
class
most
appealing
candidates
for
wide
range
potential
applications.
In
particular,
we
seen
some
major
breakthroughs
made
field
five
not
only
developing
novel
synthetic
methods
exploring
new
structures/properties
but
also
identifying
innovative
applications
pushing
forward
commercialisation.
this
review,
provide
critical
summary
recent
progress
particular
focus
years.
After
brief
background
introduction,
first
discuss
materials,
exfoliation,
liquid
vapor
phase
deposition,
wet-chemical
synthesis
as
well
engineering
belonging
to
nanomaterials
(PEN).
We
then
introduce
superconducting/optical/magnetic
chirality
along
newly
emerging
magic
angle
superlattices.
Following
that,
promising
electronics,
optoelectronics,
catalysis,
energy
storage,
solar
cells,
biomedicine,
sensors,
environments,
etc.
are
described
sequentially.
Thereafter,
present
theoretic
calculations
simulations
materials.
Finally,
after
concluding
current
progress,
personal
discussions
existing
challenges
future
outlooks
rapidly
field.
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
33(26)
Published: May 24, 2021
Chiral
materials
with
intrinsic
inversion-symmetric
structures
possess
many
unique
physicochemical
features,
including
circular
dichroism,
circularly
polarized
photoluminescence,
nonlinear
optics,
ferroelectricity,
and
spintronics.
Halide
perovskites
have
attracted
considerable
attention
owing
to
their
excellent
optical
electrical
properties,
which
are
particularly
suitable
for
realizing
high
power-conversion
efficiency
in
solar
cells.
Recent
studies
shown
that
chirality
can
be
transferred
from
chiral
organic
ligands
into
halide
the
resultant
combine
advantages
of
both
perovskites;
this
provides
an
ideal
platform
design
next-generation
optoelectronic
spintronic
devices.
In
progress
report,
most
recent
advances
summarized
various
chemical
perovskites,
synthesis
strategies,
generation
mechanisms,
physical
properties.
Furthermore,
potential
chiral-halide-perovskite-based
applications
presented
challenges
prospects
discussed.
This
report
outlines
diverse
construction
strategies
proposes
research
directions
thus,
it
insights
novel
facilitates
investigation
employ
chirality.
ACS Energy Letters,
Journal Year:
2023,
Volume and Issue:
8(2), P. 1152 - 1191
Published: Jan. 26, 2023
Lead
halide
perovskite
nanocrystals
(LHP
NCs)
have
emerged
as
next-generation
semiconductor
materials
with
outstanding
optical
and
optoelectronic
properties.
Because
of
the
high
surface-to-volume
ratio,
performance
colloidal
stability
LHP
NCs
largely
depend
on
their
surface
chemistry,
especially
ligands
termination.
On
one
hand,
capping
improve
luminescence;
other
hand
highly
dynamic
binding
nature
is
detrimental
to
photoluminescence
NCs.
In
addition,
functionalization
desired
molecules
induces
new
functionalities
such
chirality,
light
harvesting,
triplet
sensitization
through
energy/electron
transfer
or
use
X-ray
detectors.
this
review,
we
present
current
understanding
an
atomic
view
chemistry
NCs,
including
crystal
termination,
vacancies,
different
types
ligands.
Furthermore,
discuss
ligand-induced
functionalities,
photocatalysis
chirality.
Nature Communications,
Journal Year:
2021,
Volume and Issue:
12(1)
Published: Aug. 17, 2021
Abstract
Two-dimensional
(2D)
hybrid
metal
halide
perovskites
have
emerged
as
outstanding
optoelectronic
materials
and
are
potential
hosts
of
Rashba/Dresselhaus
spin-splitting
for
spin-selective
transport
spin-orbitronics.
However,
a
quantitative
microscopic
understanding
what
controls
the
magnitude
is
generally
lacking.
Through
crystallographic
first-principles
studies
on
broad
array
chiral
achiral
2D
perovskites,
we
demonstrate
that
specific
bond
angle
disparity
connected
with
asymmetric
tilting
distortions
octahedra
breaks
local
inversion
symmetry
strongly
correlates
computed
spin-splitting.
This
distortion
metric
can
serve
descriptor
rapid
discovery
candidate
strong
Our
work
establishes
that,
rather
than
global
space
group,
inorganic
layer
induced
via
appropriate
organic
cations
provide
key
design
objective
to
achieve
in
perovskites.
New
reported
here
couple
sizeable
degrees
freedom
offer
unique
paradigm
interest
spintronics.
Journal of the American Chemical Society,
Journal Year:
2021,
Volume and Issue:
143(22), P. 8437 - 8445
Published: May 17, 2021
Structural
engineering
in
multiple
scales
permits
the
integration
of
exotic
properties
into
a
single
material,
which
boosts
development
ultracompact
multifunctional
devices.
Layered
perovskites
are
capable
cross-linking
efficient
carrier
transport
originating
from
few-layer
perovskite
frameworks
with
extended
functionalities
contributed
by
designable
bulky
organic
cations
and
nanostructures,
thus
providing
platform
for
multiscale
material
engineering.
Herein,
high-performance
Stokes-parameter
photodetectors
arbitrary
polarized
light
detection
realized
on
basis
solution-processed
chiral-perovskite
nanowire
arrays.
The
chiral
ammonium
intercalated
between
layers
responsive
to
circularly
maximum
anisotropy
factor
0.15,
while
strictly
aligned
nanowires
anisotropic
dielectric
function
result
large
ratio
1.6
linearly
light.
Single
crystallinity
pure
crystallographic
orientation
permit
in-plane
along
nanowires,
yielding
responsivity
47.1
A
W–1
detectivity
1.24
×
1013
Jones.
By
synergy
linear-
circular-polarization
response
high
optoelectronic
performance
sufficient
photocurrent
contrasts,
photodetection
is
demonstrated
these
nanowires.
Our
small
footprint
performances
present
promising
applications
toward
polarization
imaging.
Chemical Science,
Journal Year:
2021,
Volume and Issue:
13(3), P. 633 - 656
Published: Nov. 9, 2021
This
review
shows
how
chirality
may
be
used
for
the
design,
construction
and
evolution
of
higher
ordered
complex
chiral
nanostructures
through
hierarchical
self-assembly.
Angewandte Chemie International Edition,
Journal Year:
2021,
Volume and Issue:
60(19), P. 10730 - 10735
Published: March 1, 2021
Abstract
Chiral
perovskites
have
emerged
as
a
significant
class
of
materials
showing
promising
optoelectronic
and
spintronic
applications.
Reports
chiral
perovskite
ferroelectrics,
however,
been
scarce.
In
this
work,
we
successfully
synthesized
homochiral
lead–iodide
ferroelectrics
[(
R
)‐
N
‐(1‐phenylethyl)ethane‐1,2‐diaminium]PbI
4
S
by
introducing
methyl
group
into
the
organic
cation
parent
(
‐benzylethane‐1,2‐diaminium)PbI
.
Vibrational
circular
dichroism
spectra
identify
mirroring
relationship.
They
both
undergo
222
F
2‐type
paraelectric–ferroelectric
behavior
at
around
378
K
coupled
with
clear
ferroelastic
domain
“ON/OFF”
switching.
Besides,
they
exhibit
an
evident
thermochromism
color
change
from
orange–yellow
to
orange–red.
To
our
knowledge,
discovery
integrated
ferroelectricity,
ferroelasticity,
reversible
in
is
unprecedented.
