Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 24, 2024
Abstract
Perovskite
solar
cells
(PSCs)
have
achieved
impressive
efficiency,
but
their
commercialization
is
limited
by
issues
like
chemical
homogeneity
within
the
perovskite
films,
leading
to
defects
and
phase
segregation,
which
severely
compromise
stability
performance
of
PSCs.
This
study
presents
a
novel
approach
overcoming
these
barriers
employing
N,N
‐methylenebisacrylamide
(MBA)
as
multifunctional
crosslinking
agent
structure.
MBA
enhances
uniformity
both
laterally
vertically,
improves
crystallinity,
boosts
overall
film
forming
robust
crosslinked
network
that
regulates
nucleation
growth
dynamics
during
pre‐seeding
process.
modification
ensures
uniform
distribution
matrix
significantly
reduces
defect
densities.
As
result,
MBA‐treated
PSCs
notable
improvement
in
power
conversion
efficiency
(PCE),
reaching
up
24.26%,
compared
22.64%
control
devices.
Additionally,
MBA‐modified
devices
demonstrated
remarkable
stability,
maintaining
90%
initial
after
1200
h
continuous
illumination,
contrast
50%
loss
observed
just
500
h.
These
findings
underscore
transformative
potential
an
additive
PSCs,
offering
viable
pathway
not
only
enhance
also
improve
long‐term
devices,
thus
bringing
closer
commercial
viability.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 14, 2024
Abstract
The
synthesis
of
multicomponent
metal
halide
perovskites
(MHPs)
by
cationic
and/or
alloying
allows
band
gap
tuning,
optimizing
performance
and
improving
stability.
However,
these
materials
often
suffer
from
compositional,
structural,
property
inhomogeneities,
leading
to
uneven
carrier
transport
significant
non‐radiative
recombination
losses
in
lead
perovskites.
While
many
researchers
have
focused
on
the
aggregation
perovskite
ions,
impact
surface
potential
has
received
relatively
less
attention.
In
this
study,
multifunctional
ionic
liquid
1‐allyl‐3‐methylimidazole
dicyanamide
(AMI)
is
introduced
into
precursor
effectively
regulate
layer.
This
approach
inhibits
recombination,
enhances
injection,
improves
device
performance.
Surface
homogenization
within
layer
leads
simultaneous
improvements
both
efficiency
stability
solar
cells.
For
wide‐bandgap
(1.81
eV),
optimal
power
conversion
(PCE)
reaches
20.44%,
with
an
open‐circuit
voltage
(
V
oc
)
1.339
V,
a
short‐circuit
current
density
J
sc
17.92
mA
cm
−2
,
high
fill
factor
(FF)
85%.
strategy
also
proved
effective
for
conventional
bandgap
cells
(PSCs)
(1.53
increase
performance,
PCE
increasing
23.22%
25.41%.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(22), P. 28905 - 28916
Published: May 22, 2024
The
two-step
sequential
deposition
strategy
has
been
widely
recognized
in
promoting
the
research
and
application
of
perovskite
solar
cells,
but
rapid
reaction
organic
salts
with
lead
iodide
inevitably
affects
growth
crystals,
accompanied
by
generation
more
defects.
In
this
study,
regulation
crystal
was
achieved
a
method
mixing
1-naphthylmethylammonium
bromide
(NMABr)
salts.
results
show
that
addition
NMABr
effectively
delays
aggregation
crystallization
behavior
salts;
thereby,
optimal
(001)
orientation
is
promoted.
Based
on
phenomenon
delaying
process
perovskite,
"slow-release
effect
assisted
crystallization"
defined.
Moreover,
incorporation
Br
element
expands
band
gap
mitigates
material
defects
as
nonradiative
recombination
centers.
Consequently,
power
conversion
efficiency
(PCE)
enhanced
cells
(PSCs)
reaches
20.20%.
It
noteworthy
hydrophobic
nature
naphthalene
moiety
can
enhance
humidity
resistance
PSCs,
phase
does
not
decompose
for
than
3000
h
(30–40%
RH),
enabling
it
to
retain
90%
its
initial
even
after
exposure
nitrogen
environment
1200
h.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 24, 2024
Abstract
Perovskite
solar
cells
(PSCs)
have
achieved
impressive
efficiency,
but
their
commercialization
is
limited
by
issues
like
chemical
homogeneity
within
the
perovskite
films,
leading
to
defects
and
phase
segregation,
which
severely
compromise
stability
performance
of
PSCs.
This
study
presents
a
novel
approach
overcoming
these
barriers
employing
N,N
‐methylenebisacrylamide
(MBA)
as
multifunctional
crosslinking
agent
structure.
MBA
enhances
uniformity
both
laterally
vertically,
improves
crystallinity,
boosts
overall
film
forming
robust
crosslinked
network
that
regulates
nucleation
growth
dynamics
during
pre‐seeding
process.
modification
ensures
uniform
distribution
matrix
significantly
reduces
defect
densities.
As
result,
MBA‐treated
PSCs
notable
improvement
in
power
conversion
efficiency
(PCE),
reaching
up
24.26%,
compared
22.64%
control
devices.
Additionally,
MBA‐modified
devices
demonstrated
remarkable
stability,
maintaining
90%
initial
after
1200
h
continuous
illumination,
contrast
50%
loss
observed
just
500
h.
These
findings
underscore
transformative
potential
an
additive
PSCs,
offering
viable
pathway
not
only
enhance
also
improve
long‐term
devices,
thus
bringing
closer
commercial
viability.
