It
is
highly
desired
to
get
rid
of
the
high-temperature
annealing
process
in
manufacturing
perovskite
solar
cells
(PSCs)
reduce
production
costs.
Herein,
films
are
designed
by
rapidly
evaporating
a
mixture
solvent
consisting
methylamine
ethanol
solution
(MA-EtOH
sol)
and
acetonitrile
(ACN)
(MA-EtOH-ACN)
dopping
different
amounts
formamidinium
iodide
(FAI)
into
CH3NH2PbI3
(MAPbI3)
precursor
solution;
as
result,
step
effectively
eliminated
while
cell
efficiency
remains
unchanged.
The
situ
UV-vis
absorption
for
monitoring
crystallization
shows
that
FAI
retards
rate,
leading
dense
smooth
film.
also
found
synergistic
effect
composition
engineering
reduces
defect
density,
boosts
strength,
enhances
film
stability.
Consequently,
high-performance
ITO/SnO2/FA0.05MA0.95PbI3/carbon
device
obtained
with
high
18.74%,
an
excellent
short
circuit
current
25.04
mA
cm-2,
open
voltage
1.16
V,
fill
factor
64.53%.
carbon-based
exhibit
outstanding
This
strategy
offers
reference
producing
efficient
stable
straightforward
ink
method.
Buried
interface
in
perovskite
solar
cells
(PSCs)
is
a
critical
determination
for
the
performance
and
stability
because
it
dominates
crystallization
of
layer,
non-radiative
recombination,
ion
migration
at
interfaces.
Herein,
novel
versatile
modifier,
potassium
sucrose
octasulfate
(K8SOS)
which
rich
sulfonic
groups
ions,
introduced
bridging
buried
SnO2
interface,
to
improve
interfacial
states
further
device
performance.
It
found
that
K8SOS
serves
as
bridge
can
not
only
passivate
defects
through
multi-site
strengthening
chemical
binding,
thus
effectively
inhibiting
non-radiation
recombination
suppressing
migration,
but
also
optimize
surface
state
absorber,
ultimately
achieving
gratifying
efficiency
25.32%
with
negligible
hysteresis.
What's
more,
optimized
delivers
admirable
sustaining
over
90%
initial
power
conversion
after
being
aged
under
continuous
85
°C
heating
stress
40
±
5%
RH
humidity
≈600
≈1200
h
1-sun
illumination,
respectively.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(12), С. 15605 - 15616
Опубликована: Март 13, 2024
Improving
the
quality
of
buried
interface
is
decisive
for
achieving
stable
and
high-efficiency
perovskite
solar
cells.
Herein,
we
report
engineering
by
using
dipolar
2,4-difluoro-3,5-dichloroaniline
(DDE)
as
adhesive
between
titanium
dioxide
(TiO2)
MAPbI3.
By
manipulation
anchoring
groups
DDE,
this
molecule
not
only
passivated
defects
TiO2
but
also
optimized
energy
level
alignment.
Furthermore,
film
on
modified
surface
showed
improved
crystallinity,
released
residual
stress,
reduced
trap
states.
Therefore,
these
benefits
directly
contribute
to
a
power
conversion
efficiency
up
22.10%.
The
unencapsulated
device
retained
90%
initial
efficiencies
(PCE)
after
continuous
light
illumination
1000
h
93%
PCE
exposure
air
with
relative
humidity
30–40%
over
3000
h.
Moreover,
performance
PSCs
based
FA0.15MA0.85PbI3
has
increased
from
20.48
23.51%.
Our
results
demonstrate
effectiveness
universality
halogen-substituted
arylamine
enhancing
PSC
performance.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(22)
Опубликована: Фев. 8, 2024
Abstract
Antimony
selenosulfide
(Sb
2
(S,Se)
3
)
solar
cells
are
critically
restrained
by
the
Sb
/charge
transport
layer
interface
with
scarce
carriers
transfer
ability
and
high
density
of
deep‐level
defect‐induced
traps,
which
prone
to
spark
nonradiative
recombination
capture
benign
photogenerated
carriers.
Herein,
utilizing
intermolecular
noncovalent
interactions
strategy
in
molecular
stereoscopic
structural
engineering,
two
dopant‐free
hole
materials
(HTMs)
constructed,
coded
as
T‐BDT
F‐BDT,
synergistic
selectivity
interfacial
healing
ability.
The
theoretical
simulation
experimental
results
decipher
that
F‐BDT
possesses
more
favorable
planarized
conformation,
charge
delocalization/coupling
stacking
pattern,
endow
it
salient
selection,
robust
passivation
appropriate
energy
level
alignment.
Consequently,
cell
HTM
realize
an
outstanding
power
conversion
efficiency
9.13%,
hitting
record
for
devices
under
conditions.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(36)
Опубликована: Май 17, 2024
Abstract
Interface
in
perovskite
solar
cells
(PSCs)
is
of
vital
importance
because
it
dominates
deep‐level
defects
and
non‐radiative
recombination,
thus
impacting
both
efficiency
stability
further.
Herein,
a
symmetrical
acceptor–donor–acceptor
(A–D–A)
conjugated
molecule
with
the
core
architecture
terthieno[3,2‐b
hiophene
2‐(3‐oxo‐2,3‐dihydro‐1
H‐inden‐1‐ylidene)malononitrile,
named
6TIC,
as
versatile
buffer
layer,
adopted
to
enhance
photovoltaic
performance
simultaneously.
It
found
that
filling
at
grain
boundaries
surface
can
not
only
chemically
anchor
components
substantially
eliminate
interfacial
suppress
detestable
but
also
effectively
improve
energy
level
alignment
facilitate
charge
transfer
interface,
resulting
an
excellent
power
conversion
24.81%
admirable
fill
factor
84.5%.
Furthermore,
benefiting
from
unexceptionable
protection
effect
hydrophobic
greatly
improved
operational
delivered,
retaining
90%
initial
for
960
h
aging
relative
humidity
60
±
5%
air
1450
under
continuous
85
°C
heating
stress.
This
strategy
may
provide
new
avenue
advancing
high‐efficiency
stable
PSCs.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 5, 2024
Abstract
The
performance
of
perovskite
cells
closely
relies
on
the
quality
films,
leading
to
a
special
focus
crystallization
manipulation
and
defect
control.
In
this
study,
novel
approach
using
1D
metal‐free
perovskites,
specifically
DABCO‐NH
4
Cl
3
,
is
proposed
facilitate
process
3D
FAPbI
while
simultaneously
addressing
surface
defects.
Analysis
kinetics
reveals
that
introduction
perovskites
provides
numerous
nucleation
sites,
effectively
slowing
down
crystal
growth
rates
resulting
in
formation
uniform,
large‐grain
films.
Furthermore,
organic
groups
present
play
crucial
role
passivating
defects
within
structure.
synergistic
impact
these
factors
enables
achieve
an
efficiency
24.72%
demonstrating
exceptional
stability.
This
research
offers
promising
for
controlling
crystallization,
development
high‐efficiency
stable
materials.
ACS Applied Energy Materials,
Год журнала:
2024,
Номер
7(8), С. 3137 - 3144
Опубликована: Апрель 2, 2024
As
a
shining
star
in
the
photovoltaic
community,
perovskite
solar
cells
(PSCs)
have
been
making
significant
progress
recent
years.
However,
poor
long-term
operation
stability
caused
by
various
defects
seriously
restricts
their
commercialization
process.
In
this
work,
multifunctional
ionic
liquid
passivator,
1-aminoethyl-3-methylimidazolium
tetrafluoroborate
(AMFB),
is
incorporated
to
passivate
A+,
B2+,
and
X–
absorber
enhance
device
further.
It
found
that
AMFB
can
cooperate
with
undercoordinated
Pb2+
from
hydrogen
bonds
organic
cations
I–
ions,
leading
sufficiently
passivated
film.
Besides,
more
suitable
energy
arrangement
hydrophobicity
of
resultant
interface
contribute
facilitated
carrier
transport
durable
devices.
result,
champion
power
conversion
efficiency
(PCE)
optimized
devices
significantly
increases
22.16
24.41%
negligible
hysteresis,
large-area
also
boost
19.86
23.24%.
Surprisingly,
unpackaged
demonstrate
excellent
robustness
against
moisture
thermal
stresses,
maintaining
over
90%
initial
PCE
after
1500
h
continuous
heating
at
85
°C
500
aging
air
relative
humidity
70
±
5%.
This
work
provides
an
effective
feasible
method
for
improving
performance
PSCs
facilitating
