The Journal of Physical Chemistry Letters,
Journal Year:
2024,
Volume and Issue:
15(19), P. 5276 - 5287
Published: May 9, 2024
The
family
of
Mn-based
organic–inorganic
hybrids
has
greatly
expanded
due
to
their
advantages
in
applications.
They
also
show
superior
bright
and
size-tunable
photoluminescence
can
be
considered
a
perfect
alternative
toxic
lead-based
compounds.
In
this
work,
we
present
the
detailed
structural,
optical,
electrical
characterization
([(NH3CH2CH2)3NH])2[MnBr5]Br5.
title
compound
exhibits
unique
type
inorganic
arrangement
created
by
trigonal
bipyramids.
It
crystallizes
noncentrosymmetric
space
group
R32,
indicating
its
optical
activity,
piezoelectricity,
second-order
nonlinearity
proven
second
harmonic
light
measurements.
studied
crystals
exhibit
intense
originating
from
Mn(II)
ion
4T1(G)
→
6A1
transition.
measured
lifetime
emission
is
≤1.5
ms,
while
quantum
yield
for
both
powder
crystal
samples
reaches
∼70%.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(33), P. 22334 - 22343
Published: Aug. 9, 2024
This
work
reports
the
synthesis
of
chiral
perovskite
heterostructure
films
by
combining
a
two-dimensional
(2D)
(R-/S-MBA)2PbI4
with
CsPbBr3
quantum
dots
(QDs).
The
as-synthesized
exhibit
obvious
circularly
polarized
luminescence
(CPL)
properties,
even
though
pure
2D
cannot
present
photoluminescence.
It
indicates
that
chirality
excited
state
QDs
originates
from
perovskite.
circular
polarization-resolved
transient
absorption
(TA)
spectra
further
demonstrate
CPL
response
energy
transfer
between
layer
and
suppression
spin
relaxation,
which
induces
imbalance
population
states
in
layer.
In
addition,
photoluminescence
(PL),
dichroism
(CD),
these
can
be
controlled
varying
thickness
component
layer,
demonstrates
anion
exchange
tune
chemical
composition
optoelectronic
properties
due
to
low
bonding
difference
them
decrease
strain
within
reduce
radiative
recombination
lifetime.
provides
guidance
for
perovskites
strong
insight
into
origination
CPL.
Abstract
Chiral
perovskites
are
considered
as
promising
candidates
for
circularly
polarized
luminescence
(CPL)
light
source,
by
attracting
the
broader
scientific
community
their
applications
in
chiral
optoelectronics
and
spintronics.
However,
it
is
still
a
great
challenge
to
achieve
both
substantial
photoluminescence
asymmetry
(
g
CPL
)
high
quantum
yield
(PLQY)
simultaneously
brightness
due
limitations
associated
with
magnetic
transition
dipole
moments.
Herein,
this
problem
overcome
large
of
1.6×10
−2
PLQY
56%
perovskite
through
element
doping
strategy.
The
substitution
Pb
2+
ion
smaller
Mn
ions
shrinks
crystal
lattice
around
[MnBr
6
]
4−
octahedra,
amplifying
asymmetric
distortion
surrounding
ions.
Moreover,
can
harvest
photoexcitation
energy
perovskites,
its
spin‐flipping
characteristics
enable
highly
efficient
from
d–d
on
levels.
Furthermore,
strategy
proven
be
universal
tactic
enhancing
confirmed
series
1D‐
or
2D‐chiral
various
ligands
halogens.
findings
provide
an
in‐depth
understanding
structure‐property
relationship
toward
optoelectronic
spintronic
applications.
Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
63(38), P. 17367 - 17371
Published: Sept. 4, 2024
Recently,
chiral
organic-inorganic
hybrid
metal
halides
have
attracted
considerable
interest
as
promising
multifunctional
materials,
benefiting
from
their
diverse
structures
and
tunable
photophysical
properties.
Herein,
by
introducing
the
ligand
methylbenzylamine
(
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 19, 2024
Electrically
switchable
second
harmonic
generation
(SHG)
is
highly
valuable
in
electro-optic
modulators,
which
can
be
deployed
data
communication
and
quantum
optics.
Coupling
circular
dichroism
(CD)
with
an
electrically
controlled
SHG
process
advantageous
because
it
enhances
the
signal
transmission
bandwidth
security
while
enabling
multiple
modulation
modes
for
optical
logic.
However,
ferroelectrically
chiral
second-order
nonlinearity
rarely
reported.
Here,
we
demonstrate
of
based
on
multipolar
effect
a
ferroelectric
two-dimensional
hybrid
perovskite
s-(FBDA)CdCl4
(s-FBDA
=
(2s)-2-fluorobutane-1,4-diamine).
(s-FCC)
crystals
are
stable
air,
its
response
exhibits
(i.e.,
SHG-CD)
that
switched.
The
SHG-CD
arises
from
reconfiguration
distinct
chirality-induced
moments
during
switching
process.
This
induces
π/2
difference
SHG,
leading
to
reversal
circularly
polarized
light
sensitivity.
As
proof
concept,
s-FCC
used
encrypted
communications.
Angewandte Chemie International Edition,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 10, 2025
The
potential
applications
of
circularly
polarized
phosphorescent
materials
in
chiroptical
devices
have
attracted
considerable
interest.
Nevertheless,
the
design
efficient
near-infrared/red
pure
organic
remains
a
significant
challenge,
largely
due
to
limitations
imposed
by
energy-gap
law
and
Wallach's
rule.
In
this
study,
chiral
metal-free
perovskite
strategy
is
employed
overcome
these
restrictions.
introduction
cyclohexylenediammonium
cations
as
A-site
perovskites
results
generation
an
phosphorescence
at
637
nm
with
lifetime
up
227.98
µs.
Furthermore,
photoluminescence
quantum
yield
(PLQY)
can
reach
71.22%,
accompanied
anisotropy
factor
9.8
×
10-3.
figure
merit
(FM
=
PLQY×
|glum|)
6.98
10-3,
which
highest
value
achieved
among
all
materials.
work
proposes
unique
achieve
highly
based
on
non-conjugated
luminophores,
accomplished
combining
superior
optical
electronic
properties
chirality
rational
molecular
design.
Angewandte Chemie,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 9, 2025
Abstract
The
potential
applications
of
circularly
polarized
phosphorescent
materials
in
chiroptical
devices
have
attracted
considerable
interest.
Nevertheless,
the
design
efficient
near‐infrared/red
pure
organic
remains
a
significant
challenge,
largely
due
to
limitations
imposed
by
energy‐gap
law
and
Wallach's
rule.
In
this
study,
chiral
metal‐free
perovskite
strategy
is
employed
overcome
these
restrictions.
introduction
cyclohexylenediammonium
cations
as
A‐site
perovskites
results
generation
an
phosphorescence
at
637
nm
with
lifetime
up
227.98
µs.
Furthermore,
photoluminescence
quantum
yield
(PLQY)
can
reach
71.22%,
accompanied
anisotropy
factor
9.8
×
10
−3
.
figure
merit
(FM
=
PLQY×
|
g
lum
|)
6.98
,
which
highest
value
achieved
among
all
materials.
work
proposes
unique
achieve
highly
based
on
non‐conjugated
luminophores,
accomplished
combining
superior
optical
electronic
properties
chirality
rational
molecular
design.
Nano Letters,
Journal Year:
2024,
Volume and Issue:
24(3), P. 1001 - 1008
Published: Jan. 10, 2024
We
report
a
zero-dimensional
(0D)
lead-free
chiral
perovskite
(S-/R-MBA)4Bi2I10
with
high
degree
of
circularly
polarized
light
(CPL)
emission.
Our
0D
exhibits
an
average
circular
polarization
(DOCP)
19.8%
at
78
K
under
linearly
laser
excitation,
and
the
maximum
DOCP
can
reach
25.8%,
which
is
40
times
higher
than
highest
0.5%
in
all
reported
perovskites
to
best
our
knowledge.
The
attributed
free
exciton
emission
Huang–Rhys
factor
2.8.
In
contrast,
prior
reports
are
dominant
by
self-trapped
spin
relaxation
reduces
dramatically.
Moreover,
we
realize
manipulation
valley
freedom
monolayer
WSe2
using
injection
perovskites.
results
provide
new
perspective
develop
devices
for
CPL
source,
spintronics,
valleytronics.
Advanced Physics Research,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 7, 2025
Abstract
Chiral
hybrid
organic‐inorganic
perovskites
(HOIPs)
have
emerged
as
promising
materials
for
optoelectronic
and
spintronic
applications,
leveraging
unique
properties
such
circularly
polarized
luminescence
(CPL),
nonlinear
optical
(NLO)
emission,
chiral‐induced
spin
selectivity
(CISS).
However,
challenges
remain
in
stabilizing
these
under
environmental
stresses
precisely
controlling
chirality
scalable
use.
This
review
summarizes
five
main
strategies
to
induce
HOIPs,
i.e.,
direct
incorporation
of
chiral
cations,
surface
modification
with
ligands,
ion
doping,
template‐induced
chirality,
metasurfaces.
Each
approach
offers
distinct
advantages
optimizing
CPL
efficiency
device
stability,
paving
the
way
next‐generation
applications
detectors,
information
encryption,
devices,
etc.
Abstract
Perovskite
materials,
known
for
their
exceptional
photoelectronic
and
photonic
properties,
have
attracted
considerable
interest
in
the
field
of
nonlinear
optics
(NLO).
Herein,
0D
organic–inorganic
hybrid
bismuth
perovskite
(PPA)
3
BiI
6
(PPA
=
3‐phenyl‐2‐propen‐1‐ammonium)
is
successfully
synthesized
using
cooling‐induced
crystallization
method.
The
optical
responses
this
halide
are
investigated
within
visible
spectrum
range
405–532
nm
by
spatial
self‐phase
modulation
(SSPM)
It
found
that
exhibits
excellent
third‐order
susceptibilities
(),
up
to
10
−8
e.s.u.
at
405
nm,
which
larger
than
those
reported
lead‐free
perovskites
previous
research.
all‐optical
switching
experiment
conducted,
effectively
realizing
phase
light
through
interaction.
Moreover,
a
novel
unidirectional
NLO
excitation
diode
with
/SnS
2
structure
demonstrated
spatially
nonreciprocal
propagation.
research
discovered
superior
properties
systematically
its
potential
applications
device
technology.
Angewandte Chemie International Edition,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 28, 2025
Chiral
organic-inorganic
hybrid
metal
halides
(OIHMHs)
are
commonly
constructed
by
introducing
pairs
of
enantiomorphic
chiral
precursors
through
a
single
chirality
transfer
pathway,
which
may
limit
the
regulation
structural
diversity
and
chiroptoelectronic
properties.
Herein,
we
propose
new
strategy
for
achieving
reversible
induction
OIHMHs
with
inverted
chiroptical
properties
external
internal
pathways,
utilizing
reagent
R-/S-α-methylbenzylamine
(R-/S-MBA).
Specifically,
R-MBA
can
externally
induce
enrichment
M-DMA4(Bi0.486In0.511Sb0.003)Cl7
(M-DMA4(Bi-In-Sb)Cl7,
DMA
=
dimethylammonium
cation)
without
integrating
into
structure.
Conversely,
insert
structure,
internally
inducing
formation
DMA(R-MBA)2(Bi0.634In0.362Sb0.004)Cl6
(DMA(R-MBA)2(Bi-In-Sb)Cl6),
reverses
arrangements
inverts
both
linear
nonlinear
Both
induced
exhibit
significant
responses
high
photoluminescence
quantum
yield
(PLQY)
second
harmonic
generation
(SHG).
Moreover,
centimeter-sized
rhombic
crystal
enables
morphology-
angle-dependent
circularly
polarized
luminescence
dissymmetry
factor
∼0.02,
anisotropy.
The
enhances
SHG
intensity
nine-fold
increases
PLQY
to
98.9%.
This
multi-path
transfer,
based
on
reagent,
significantly
broaden
scope
functional
OIHMH
materials
facilitate
