Materials,
Journal Year:
2024,
Volume and Issue:
17(11), P. 2503 - 2503
Published: May 22, 2024
Hybrid
lead
iodide
perovskites
are
promising
photovoltaic
and
light-emitting
materials.
Extant
literature
data
on
the
key
optoelectronic
luminescent
properties
of
hybrid
indicate
that
these
affected
by
electron–phonon
coupling,
dynamics
organic
cations,
degree
lattice
distortion.
We
report
temperature-dependent
Raman
studies
BA2MAPb2I7
BA2MA2Pb3I10
(BA
=
butylammonium;
MA
methylammonium),
which
undergo
two
structural
phase
transitions.
obtained
in
broad
temperature
(360–80
K)
wavenumber
(1800–10
cm−1)
ranges
show
ordering
BA+
cations
triggers
higher
transition,
whereas
freezing
MA+
occurs
below
200
K,
leading
to
onset
low-temperature
transition.
This
is
associated
with
significant
deformation
inorganic
sublattice,
as
evidenced
changes
observed
mode
region.
Our
results
show,
therefore,
spectroscopy
a
very
valuable
tool
for
monitoring
separate
different
perovskites,
comprising
“perovskitizer”
interlayer
cations.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 3, 2025
We
demonstrated
the
construction
of
binary
phase
diagrams
coordination
polymer
crystals
by
using
their
reversible
solid–liquid
transition
(melting
and
crystallization)
behaviors.
Three
types
Ag+-based
polymers
were
made
origins
each
diagram
formation
investigated.
All
showed
eutectic
phenomena
induced
ligand
exchange
reactions
at
interface
two
constituents.
Solid
solution
was
observed
when
we
used
with
similar
structures
geometries,
reaction
driven
both
anion
processes.
The
optimal
compounds
found
in
applicable
as
a
latent
heat
storage
material
working
100
°C
high
energy
recovery
efficiency,
stability
phase-transition
cycles,
large
hysteresis
melting/crystallization.
Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 20, 2025
Abstract
The
great
variety
of
lead
halide
perovskite
semiconductors
represents
an
outstanding
platform
for
studying
crystal
symmetry
effects
on
the
spin‐dependent
properties.
Access
to
them
is
granted
through
optical
orientation
exciton
and
carrier
spins
by
circularly
polarized
photons.
Here,
spin
polarization
investigated
at
1.6
K
cryogenic
temperature
in
four
crystals
with
different
symmetries:
(almost)
cubic
FA
0.9
Cs
0.1
PbI
2.8
Br
0.2
FAPbBr
3
,
orthorhombic
MAPbI
CsPbBr
.
Giant
85%
found
excitons
while
it
amounts
20%
For
all
studied
crystals,
robust
detuning
laser
photon
energy
from
resonance,
remaining
constant
high
detunings
up
0.3
eV,
above
which
continuously
decreases
zero
exceeding
1
eV.
No
acceleration
relaxation
large
kinetic
crystals.
This
evidences
absence
Dyakonov‐Perel
mechanism,
based
Rashba‐Dresselhaus
splitting
states
finite
k
‐vectors.
indicates
that
spatial
inversion
maintained
independent
or
phase.
Solar RRL,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 11, 2024
Perovskite
solar
cells
(PSCs)
have
attracted
widespread
attention
due
to
their
low
cost
and
high
efficiency.
So
far,
a
variety
of
single‐junction
PSCs
been
successfully
developed
considered
for
commercialization,
including
normal
(N‐PSCs),
inverted
(I‐PSCs),
carbon‐based
(C‐PSCs)
without
hole
transporter.
Herein,
the
material
cost,
equipment
depreciation
energy
consumption
these
three
types
(1
m
2
)
in
detail
are
analyzed.
As
indicated,
total
fabrication
N‐PSCs
($86.49)
I‐PSCs
($81.31)
is
very
close,
but
significantly
reduced
$41.16
C‐PSCs
(49%–52%
reduction)
because
carbon
electrode
much
cheaper
than
noble
metal
organic
Besides,
only
low‐cost
slot‐die
coating
process
with
needed
deposition
electrode,
while
expensive
physical
vapor
reactive
plasma
processes
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
12(21)
Published: May 3, 2024
Abstract
Layered
hybrid
organic–inorganic
metal‐halide
perovskites
(HOIPs)
can
acquire
chirality
from
molecules
incorporated
into
their
structure
showing
exciting
possibilities
in
optoelectronics
and
spintronics.
However,
researchers
have
focused
attention
on
the
study
of
bulk
compounds,
namely
unstable
toxic
Pb
HOIPs.
Herein,
chiroptical
properties
R‐
S‐β‐methylphenethylammonium
Mn
chloride
HOIPs
are
reported
both
few‐layer
limit
as
exfoliated
flakes.
Red
photoluminescence
(PL)
emission
originating
octahedrally
coordinated
2+
is
observed,
with
a
PL
shift
to
longer
wavelengths
when
passing
Circular
dichroism
circularly
polarized
mirrored‐signals
for
enantiomers
found
samples,
while
flakes,
degree
(P)
up
17%
at
80
K
achieved,
comparable
Pb‐based
Moreover,
angle‐resolved
measurements
flakes
show
that
P
isotropic.
These
findings
highlight
potential
these
spin‐optoelectronic
applications.
Chemistry of Materials,
Journal Year:
2024,
Volume and Issue:
36(21), P. 10408 - 10420
Published: Oct. 23, 2024
Metal
halide
perovskites
are
an
important
class
of
semiconductors
now
being
implemented
as
photovoltaic
absorbers
and
explored
for
light
emission,
among
other
device
applications.
The
semiconducting
properties
deeply
intertwined
with
their
composition
structure.
Specifically
the
symmetry,
tilting,
distortions
metal
octahedra
impact
band
structure
optoelectronic
properties.
In
this
review,
we
examine
various
compositions
monovalent
A-site
cations
in
three-dimensional
(3D)
AMX
Enhanced
spin-splitting
driven
by
inversion
asymmetry
can
be
effectively
achieved
through
the
incorporation
of
chiral
organic
cations
in
hybrid
organic-inorganic
systems.
Herein,
we
investigated
mechanisms
and
implications
chirality
transfer
heterostructured
perovskites
belonging
to
(PbBr2)2A2PbBr4
family,
where
A
represents
cation.
These
structures
are
characterized
an
inorganic-organic-inorganic
stacking
configuration
comprising
one
perovskite
monolayer
PbBr2
intergrowth
domain.
Our
findings
indicate
that
all
heterostructures
likely
exhibit
energetic
stability.
Importantly,
presence
introduces
local
asymmetries
facilitate
significant
effects.
Additionally,
a
racemic
mixture
induce
transition
from
two-dimensional
zero-dimensional
character
within
domain
heterostructure.
The
dimensionality
observed
for
isomers
structure
is
attributed
effect
hydrogen
bond
enhanced
lattice
strain,
leading
2D
framework
disrupt
into
isolated
octahedra
allow
breaking
centrosymmetry,
stark
contrast
with
previously
reported
literature.
Consequently,
predict
introduction
create
stable
systems
single
degree
freedom
modulates
both
spin-resolved
properties
dimensionality.
This
discovery
provides
vital
design
principle
simultaneous
tuning
spin
splitting
Crystal Growth & Design,
Journal Year:
2025,
Volume and Issue:
25(5), P. 1597 - 1604
Published: Feb. 24, 2025
Organic–inorganic
metal
halides
(OIMHs)
have
attracted
great
interest
in
the
design
of
various
functional
materials
due
to
their
advantages
easy
processability,
rich
structural
diversity,
and
assembly
flexibility.
However,
rational
control
stacking
patterns
OIMHs
for
regulation
has
been
a
long-standing
challenge.
Particularly,
little
is
known
about
intrinsic
relationship
between
dimensions
dielectric
response
at
molecular
scale.
Here,
we
investigated
modulation
effect
cationic
halogen
engineering
(N,N-dimethylethanolamine)PbBr3
on
stacking,
as
well
its
impact
thermal,
electrical,
optical
physical
properties.
Halogen
brings
varied
from
one-dimensional
(1D)
hexagonal
perovskite
structure
two-dimensional
(2D)
layered
an
interlocking
1D
chain
structure.
These
attributes
demonstrated
be
closely
related
interactions
crystal
lattice,
leading
variation
sequential
increase
phase
transition
temperature
differences
response,
with
similar
bandgaps
that
are
mainly
determined
by
inorganic
frameworks.
This
study
offers
new
insights
into
performance
optimization
organic–inorganic
hybrids.
