Nano-Micro Letters,
Год журнала:
2025,
Номер
17(1)
Опубликована: Фев. 8, 2025
Quasi-two-dimensional
(2D)
perovskite
embodies
characteristics
of
both
three-dimensional
(3D)
and
2D
perovskites,
achieving
the
superior
external
environment
stability
structure
perovskites
alongside
high
efficiency
3D
perovskites.
This
effect
is
realized
through
critical
structural
modifications
in
device
fabrication.
Typically,
have
an
octahedral
structure,
generally
ABX3,
where
organic
ammonium
cation
(A')
participates
forming
with
A'(n)
(n
=
1
or
2)
sandwiched
between
A(n-1)B(n)X(3n+1)
layers.
Depending
on
whether
A'
a
monovalent
divalent
cation,
are
classified
into
Ruddlesden-Popper
Dion-Jacobson
perovskite,
each
generating
different
structures.
Although
achieves
similar
effects,
they
incorporate
distinct
mechanisms
their
formation.
And
according
to
these
structures,
various
properties
appear,
additive
optimizing
methods
increase
also
exist
In
this
review,
scientific
understanding
engineering
perspectives
quasi-2D
investigated,
optimal
optimization
discussed
provide
insight
field.
Bilayer
nickel
oxide
(NiOx)/[2-(3,6-dimethoxy-9H-carbazol-9yl)
ethyl]
phosphonic
acid
(MeO-2PACz)
hole
transport
layers
have
become
attractive
for
perovskite
solar
cells
and
tandem
architectures.
However,
challenges
such
as
the
instability
of
NiOx
ink,
accumulation,
trap-assisted
non-radiative
recombination
at
interface
remain
major
drawbacks
using
NiOx/MeO-2PACz
HTL
bilayer.
In
this
work,
two
synergic
strategies
are
employed
to
address
these
issues
doping
ink
with
niobium
(Nb)-based
MXene)
introduction
S-benzyl-L-cysteine
(SBLC)
molecule
passivate
MeO-2PACz/perovskite
interface.
These
modifications
effectively
reduced
defect
states
in
layer
enhanced
dipole
moment
MeO-2PACz,
minimizing
valence
band
offset
reduction
charge
rates.
Consequently,
target
PSC
device,
made
1.68
eV-bandgap
perovskite,
demonstrated
a
power
conversion
efficiency
(PCE)
19.5%
improved
stability
compared
control
device
when
tested
under
ISOS
protocols.
Furthermore,
semi-transparent
(ST)
PSCs
been
fabricated
application
4T
perovskite-silicon
cell
showing
PCE
18.15%
27.95%
single-junction
architectures,
respectively.
findings
demonstrate
effectiveness
combining
strategic
passivation
techniques
inverted
enhancing
performance
without
discarding
long-term
stability.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(44)
Опубликована: Июль 16, 2024
Abstract
Phase
segregation
can
bring
low
crystallinity
and
orientation,
giving
rise
to
poor
carrier
transport
high
defect
density,
leading
device
performance.
In
order
reduce
oxidation
density
regulate
film
growth,
lots
of
reductive
additives
such
as
SnF
2
are
explored
in
tin
perovskite
growth.
Despite
the
is
effectively
reduced,
it
induces
phase
segregation.
Herein,
a
molecule
NH
5
F
with
bi‐fluoride
anion
address
this
challenge
for
solar
cells.
This
reduces
coordination
energy
Sn
2+
compared
,
hence
byproduct
[F─H─F]
−
be
eliminated
during
annealing
process,
preventing
fluoride
As
result,
highly
oriented
reduced
fabricated.
The
shows
recombination,
improved
current
density.
Consequently,
tin‐based
cell
an
efficiency
15.04%
fabricated,
ranking
one
highest
efficiencies
reported
up
now.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 27, 2024
Abstract
Triple‐cation
mixed‐halide
(TCMH),
i.e.,
(FAPbI
3
)
1‐x‐y
(MAPbBr
y
(CsPbI
x
,
perovskite
single‐crystal
thin‐films
(SCTFs)
have
emerged
as
candidates
for
high‐performance
photodetectors.
However,
high
lattice
strain,
surface
defects,
and
the
non‐ideal
yellow
phase
such
δ‐FAPbI
δ‐CsPbI
are
impeding
realization
of
high‐quality
TCMH
SCTFs.
Therefore,
synthesis
pure‐phase,
SCTFs
with
low
strain
defect
density
is
imperative
enhancing
light
absorption
carrier
mobility,
thereby
optimizing
photoresponsivity.
Herein,
an
innovative
approach
proposed
synthesize
using
optimized
space‐limited
anti‐solvent
assisted
crystallization
technique
which
employs
2‐methoxyethanol
solvent
diethyl
ether
anti‐solvent,
devoid
thermal
enhancement.
A
novel
reducing
additive,
formic
acid,
incorporated
to
mitigate
separation,
composition
ratio
meticulously
adjusted
regulate
strain.
The
results
show
that
a
pure‐phased
optimal
(FA
0.82
MA
0.11
Cs
0.07
SCTF
(2.29
×
10
9
cm
−2
),
(0.81%)
hole
mobility
(77.58
V
−1
s
successfully
prepared.
Moreover,
non‐integrated
planar
FA
photodetector
also
achieved
record
photo‐responsivity
(229.5
W
external
quantum
efficiency
(5.4
4
%),
indicating
its
great
potential
in
light‐detecting.
This
research
paves
way
development
photodetectors
via
adjusting
mitigating
defects
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 20, 2024
Abstract
Out‐of‐plane
polarization
is
a
highly
desired
property
of
two‐dimensional
(2D)
ferroelectrics
for
application
in
vertical
sandwich‐type
photoferroelectric
devices,
especially
ultrathin
ferroelectronic
devices.
Nevertheless,
despite
great
advances
that
have
been
made
recent
years,
out‐of‐plane
remains
unrealized
the
2D
hybrid
double
perovskite
ferroelectric
family.
Here,
from
our
previous
work
HQERN
((S3HQ)
4
EuRb(NO
3
)
8
,
S3HQ=S‐3‐hydroxylquinuclidinium),
we
designed
molecular
strategy
F‐substitution
on
organic
component
to
successfully
obtain
FQERN
((S3FQ)
S3FQ=S‐3‐fluoroquinuclidinium)
showing
circularly
polarized
luminescence
(CPL)
response.
Remarkably,
compared
monopolar
axis
HQERN,
not
only
shows
multiferroicity
with
coexistence
multipolar
ferroelectricity
and
ferroelasticity
but
also
realizes
dramatic
enhancement
Curie
temperature
94
K.
This
mainly
due
introduction
F‐substituted
cations,
which
leads
change
orientation
reduction
crystal
lattice
void
occupancy.
Our
study
demonstrates
an
efficient
realize
optimize
functional
characteristics,
giving
more
possibility
materials
applications
micro‐nano
optoelectronic
Perovskite
quantum
dots
(QDs)
exhibit
unique
advantages,
including
a
wide
color
gamut,
narrow
full
width
at
half-maximum,
cost-effectiveness,
and
high-efficiency
luminescence,
positioning
them
as
significant
focus
in
contemporary
optoelectronic
research.
Nevertheless,
the
synthesis
of
QDs
often
introduces
crystal
defects,
while
conventional
situ
ligands
can
detrimentally
affect
properties
perovskites.
To
overcome
these
challenges,
we
synthesized
symmetrical
silane-based
passivating
agent
containing
phosphorus–oxygen
double
bonds.
This
enabled
passivation
perovskites,
significantly
improving
their
optical
performance
stability.
Results
showed
that
postpassivation
demonstrated
bright
green
photoluminescence
(PL)
525
nm,
with
28%
enhancement
PL
intensity,
16%
increase
yield,
an
average
lifetime
(τave)
extended
by
191.2
ns.
Furthermore,
thermal
stability
80
°C
improved
3.75-fold,
under
84%
relative
humidity
conditions
increased
21%.
1,3-bis(3-diethoxyphosphorylpropyl)-1,1,3,3-tetramethyldisiloxane
(SPE)-passivated
perovskites
are
viable
for
practical
applications.
Physical Chemistry Chemical Physics,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Quasi-two-dimensional
(Q-2D)
perovskite
solar
cells
have
garnered
significant
attention
due
to
their
unique
hydrophobic
organic
cations
and
commendable
stability.
