ACS Energy Letters,
Journal Year:
2024,
Volume and Issue:
unknown, P. 427 - 438
Published: Dec. 23, 2024
The
exclusive
orientation
of
a
singular
perovskite
facet
during
crystallization
can
lead
to
significant
strain
accumulation
in
solution-processed
films,
compromising
the
performance
solar
cells
(PSCs).
To
address
this
issue,
we
propose
facet-complementarity
strategy
through
modulation
utilizing
formamidine-based
additive
1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-carboximidamide
hydrochloride
(FPPC)
control
accumulation.
FPPC
ligand
shows
strong
adsorption
on
(111)
via
chemical
interactions
with
octahedra
lattice,
promoting
formation
more
stable
against
preferred
(100)
and
achieving
complementarity
FAPbI3
film.
Additionally,
increased
dissociation
barrier
ligand-PbI2
bonding
extends
growth
window,
allowing
for
better
lattice
rearrangement
balanced
rate
from
bulk
surface.
As
result,
facet-complementary
devices
achieve
champion
efficiencies
25.63
24.26%
0.09
1.0
cm2
scales,
respectively,
greatly
enhanced
device
longevity.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 16, 2025
Abstract
Defect
density
on
the
perovskite
film
surface
significantly
exceeds
that
found
in
bulk,
primarily
due
to
presence
of
dangling
bonds
and
excessive
strain.
Herein,
a
synergistic
engineering
is
reported
aimed
at
reducing
defects
films.
This
method
involves
subjecting
thermally‐annealed
films
controlled
cooling
condition
involving
an
ambient
environment
with
regulated
humidity,
as
opposed
nitrogen
environment,
followed
by
phenethylammonium
iodide
(PEAI)
passivation.
The
treated
moisture
(MC)
exhibit
enhanced
radiative
recombination,
prolonged
charge
carrier
lifetime,
improved
hole
transport
extraction
when
contact
layer
(HTL),
alongside
significant
reduction
Notably,
passivation
effect
PEAI
MC‐treated
amplified
compared
subjected
(NC)
treatment,
evidenced
more
uniform
potential
mapping
markedly
extended
lifetime.
may
arise
from
higher
ratio
newly‐formed
2D
phase
PEA
2
FAPb
I
7
PbI
4
film.
Consequently,
MC‐based
solar
cell
(PSC)
achieves
champion
power
conversion
efficiency
(PCE)
25.28%,
surpassing
NC‐treated
device,
which
exhibits
PCE
only
24.01%.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 22, 2025
Abstract
Porous
lead
iodide
(PbI
2
)
film
is
crucial
for
the
complete
reaction
between
PbI
and
ammonium
salts
in
sequential‐deposition
technology
so
as
to
achieve
high
crystallinity
perovskite
film.
Herein,
it
found
that
tensile
stress
tin
(IV)
oxide
(SnO
electron
transport
layer
(ETL)
a
key
factor
influencing
morphology
crystallization
of
films.
Focusing
on
this,
lithium
trifluoromethanesulfonate
(LiOTf)
used
an
interfacial
modifier
SnO
/PbI
interface
decrease
reduce
necessary
critical
Gibbs
free
energy
nuclei
formation.
The
relaxed
facilitates
more
porous
generation
with
larger
particles
higher
roughness,
resulting
superior‐quality
Besides,
this
strategy
effectively
passivates
inherent
traps
smooths
levels,
boosting
charge
extraction
transfer.
As
result,
champion
power
conversion
efficiency
(PCE)
25.33%
(25.10%
stabilized
600
s)
achieved.
Furthermore,
device
demonstrates
exceptional
stability,
retaining
90%
its
initial
PCE
at
maximum
point
tracking
measurement
(under
100
mW
cm
−2
white
light
illumination
≈55
°C
temperature,
N
atmosphere)
after
h.
Chemical Society Reviews,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
This
review
systematically
analyses
the
recombination
pathways
in
PSCs,
unveils
cutting-edge
suppression
strategies,
and
underscores
potential
of
ML
optimizing
device
performance
expediting
commercial
integration.
While
(111)-dominated
perovskite
films
hold
the
potential
for
high-stability
solar
cells,
most
studies
have
primarily
focused
on
modulating
(111)
facets,
overlooking
distribution
and
formation
mechanism
of
nondominant
(100)
facets.
In
this
study,
we
delve
into
orientation
via
solvent
regulation
investigate
evolution
facet
using
various
diffraction
techniques.
The
findings
reveal
that
simply
stacking
facets
does
not
inherently
enhance
cells.
Instead,
in
significantly
influences
both
photoelectric
property
stability.
These
observations
highlight
critical
need
to
manage
interplay
between
dominant
study
further
offers
strategies
addressing
heterogeneity
achieve
a
uniform
distribution.
This
research
provides
comprehensive
framework
understanding
perovskites
valuable
guidance
designing
high-performance
ACS Applied Materials & Interfaces,
Journal Year:
2025,
Volume and Issue:
17(19), P. 27651 - 27670
Published: May 2, 2025
Currently,
the
latest
photovoltaic
technology
based
on
perovskite
solar
cells
(PSCs)
has
attracted
much
attention
due
to
low
cost,
exciting
power
conversion
efficiency
of
over
26%,
large
scalability,
and
flexibility
PSCs.
During
development
course,
optimization
electron
transport
layer
(ETL)
plays
an
important
role
in
boosting
performance
PSCs,
where
use
modification
SnO2
with
high
chemical
stability,
low-temperature
processability,
suitable
energy
band
levels
substantially
are
shown
solve
problems
poor
charge
transport,
crystallization,
inferior
stability
at
PSC
interface.
Herein,
we
dedicate
ourselves
providing
a
comprehensive
review
advanced
ETL
for
realizing
efficient
The
fundamental
properties
its
key
as
PSCs
summarized
first.
Then,
typical
preparation
methods
introduced,
including
routes
physical
routes.
Sequentially,
state-of-the-art
strategies
optimizing
quality
discussed,
such
defect
regulation,
self-assembled
monolayer
modification,
double
construction.
Finally,
shed
some
light
existing
challenges
future
research
directions
large-scale
SnO2-based
