Cesium-based
two-dimensional
(2D)
perovskites
with
attractive
phase
and
environmental
stability
have
broad
application
prospects
in
single-junction
tandem
perovskite
solar
cells
(PSCs).
However,
the
severe
nonradiative
recombination
significant
energy
losses
due
to
disordered
orientations
distributions
greatly
hinder
carrier
transport
performance
of
cesium-based
2D
PSCs
severely
limit
their
photovoltaic
performance.
Here,
we
employ
an
asymmetric
chiral
spacer
cation
source,
(
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 29, 2025
Abstract
Spin
light‐emitting
diodes
(spin‐LEDs)
are
important
for
spin‐based
electronic
circuits
as
they
convert
the
carrier
spin
information
to
optical
polarization.
Recently,
chiral‐induced
selectivity
(CISS)
has
emerged
a
new
paradigm
enable
spin‐LED
it
does
not
require
any
magnetic
components
and
operates
at
room
temperature.
However,
CISS‐enabled
with
tunable
wavelengths
ranging
from
red
near‐infrared
(NIR)
yet
be
demonstrated.
Here,
chiral
quasi‐2D
perovskites
developed
fabricate
efficient
spin‐LEDs
NIR
region
by
tuning
halide
composition.
The
optimized
perovskite
films
exhibit
circularly
polarized
luminescence
675
788
nm,
photoluminescence
quantum
yield
(PLQY)
exceeding
86%
dissymmetry
factor
(
g
lum
)
8.5
×
10
−3
2.6
−2
.
More
importantly,
direct
electroluminescence
(CPEL)
is
achieved
temperature
in
spin‐LEDs.
This
work
demonstrated
highest
external
efficiency
(EQE)
reaching
12.4%
(EL)
factors
EL
3.7
1.48
composition‐dependent
CPEL
performance
further
attributed
prolonged
lifetime
revealed
ultrafast
transient
absorption
spectroscopy.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 7, 2025
Abstract
Tandem
solar
cells
(TSCs)
based
on
wide
bandgap
(WBG)
perovskites
have
gained
significant
attention
for
their
higher
power
conversion
efficiency
(PCE)
compared
to
single‐junction
cells.
The
role
of
WBG
perovskite
(PSCs)
as
the
sub‐cell
in
tandem
consists
absorbing
high‐energy
photons
and
producing
open‐circuit
voltages
(
V
OC
).
However,
PSCs
face
serious
phase
separation
issues,
resulting
poor
long‐term
stability
substantial
loss
TSCs.
In
response,
researchers
developed
a
range
strategies
mitigate
these
challenges,
showing
promising
progress,
comprehensive
review
is
expected.
this
review,
we
discuss
mechanism
organic–inorganic
hybrids
all‐inorganic
perovskites.
Additionally,
conduct
an
in‐depth
investigation
various
enhance
stability,
including
component
engineering,
additive
interface
dimension
control,
solvent
encapsulation.
Furthermore,
application
TSCs
summarized
detail.
Finally,
perspectives
are
provided
offer
guidance
development
efficient
stable
field
Materials Chemistry Frontiers,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
A
review
of
recent
advancements
in
interface
passivation
strategies,
with
a
particular
focus
on
the
implementation
2D/3D
perovskite
across
buried
interfaces,
grain
boundaries,
and
top
interfaces.
Journal of Materials Chemistry C,
Год журнала:
2024,
Номер
12(26), С. 9693 - 9701
Опубликована: Янв. 1, 2024
Using
mixed
EA/PEA
ligands
the
quantum
well
distribution
of
quasi-2D
perovskite
can
be
regulated
by
suppressing
octahedral
distortion
and
sky-blue
PeLEDs
obtained
achieve
an
external
efficiency
14.14%.
Advanced Materials,
Год журнала:
2024,
Номер
36(48)
Опубликована: Окт. 12, 2024
Abstract
2D
Ruddlesden‐Popper
perovskites
(RPPs)
have
attracted
extensive
attention
in
recent
years
due
to
their
excellent
environmental
stability.
However,
the
power
conversion
efficiency
(PCE)
of
RPP
solar
cells
is
much
lower
than
that
3D
perovskite
(PSCs),
mainly
attributed
poor
carrier
transport
performance
and
excessive
heterogeneous
phases.
Herein,
binary
spacers
(
n
‐butylammonium,
BA
benzamidine,
PFA)
are
introduced
regulate
crystallization
kinetics
‐value
phase
distribution
form
uniform
permutation
films.
The
study
then
incorporates
=
5
2
MA
4
Pb
I
16
memory
single
crystal
achieve
ultrafast
stepped‐type
from
low
phases
high
high‐quality
(BA
0.75
PFA
0.25
)
These
single‐crystal‐assisted
strategies
produce
films,
leading
fast
extraction
significant
nonradiative
recombination
suppression.
resulting
PSC
presents
a
champion
PCE
21.15%
with
an
impressive
open
circuit
voltage
V
OC
1.26
V,
which
record
for
n‐
value
≤
5).
Journal of Materials Chemistry C,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Use
of
an
o
-F-PEABr
ligand
containing
intramolecular
hydrogen
bond
can
effectively
suppress
low-
n
phases
in
quasi-2D
perovskites.
The
resultant
light-emitting
diodes
achieve
a
maximum
efficiency
7.55%
and
pure
blue
emission
at
475
nm.
