Flexible
perovskite
solar
cells
(FPSCs)
have
great
promise
for
applications
in
wearable
technology
and
space
photovoltaics.
However,
the
unpredictable
crystallization
of
on
flexible
substrates
results
significantly
lower
efficiency
mechanical
durability
than
industry
standards.
A
strategy
is
investigated
employing
polymer
electrolyte
poly(allylamine
hydrochloride)
(PAH)
to
regulate
passivate
defect
states
films
substrates.
The
weakly
acidic
precursor
allows
PAH
undergo
partial
ionization,
leading
protonation
some
─NH
Angewandte Chemie International Edition,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 3, 2025
Abstract
The
advancement
of
tin‐based
perovskite
solar
cells
(TPSCs)
has
been
severely
hindered
by
the
poor
controllability
crystal
growth
and
energy
level
mismatch
between
fullerene‐based
electron
transport
layer
(ETL).
Here,
we
synthesized
three
cis‐configured
pyridyl‐substituted
fulleropyrrolidines
(PPF),
specifically
2‐pyridyl
(PPF2),
3‐pyridyl
(PPF3),
4‐pyridyl
(PPF4),
utilized
them
as
precursor
additives
to
regulate
crystallization
kinetics
during
film
formation.
spatial
distance
two
pyridine
groups
in
PPF2,
PPF3,
PPF4
increases
sequentially,
enabling
interact
with
more
colloidal
particles.
These
interactions
effectively
enlarge
colloid
size
decelerate
rate
perovskite,
resulting
high‐quality
PPF4‐based
films
reduced
defect
density
lower
exciton
binding
energy.
Additionally,
incorporated
a
well‐defined
fullerene
bis‐adduct,
C
60
BB,
an
interlayer
PCBM
layers
optimize
alignment.
Through
synergistic
effects
our
champion
device
achieved
efficiency
16.05
%
(certified:
15.86
%),
surpassing
16
bottleneck
setting
new
benchmark
for
TPSCs.
Moreover,
devices
exhibited
outstanding
stability,
retaining
99
their
initial
after
600
hours
maximum
power
point
tracking
under
1
sun
condition.
Angewandte Chemie,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 3, 2025
Abstract
The
advancement
of
tin‐based
perovskite
solar
cells
(TPSCs)
has
been
severely
hindered
by
the
poor
controllability
crystal
growth
and
energy
level
mismatch
between
fullerene‐based
electron
transport
layer
(ETL).
Here,
we
synthesized
three
cis‐configured
pyridyl‐substituted
fulleropyrrolidines
(PPF),
specifically
2‐pyridyl
(PPF2),
3‐pyridyl
(PPF3),
4‐pyridyl
(PPF4),
utilized
them
as
precursor
additives
to
regulate
crystallization
kinetics
during
film
formation.
spatial
distance
two
pyridine
groups
in
PPF2,
PPF3,
PPF4
increases
sequentially,
enabling
interact
with
more
colloidal
particles.
These
interactions
effectively
enlarge
colloid
size
decelerate
rate
perovskite,
resulting
high‐quality
PPF4‐based
films
reduced
defect
density
lower
exciton
binding
energy.
Additionally,
incorporated
a
well‐defined
fullerene
bis‐adduct,
C
60
BB,
an
interlayer
PCBM
layers
optimize
alignment.
Through
synergistic
effects
our
champion
device
achieved
efficiency
16.05
%
(certified:
15.86
%),
surpassing
16
bottleneck
setting
new
benchmark
for
TPSCs.
Moreover,
devices
exhibited
outstanding
stability,
retaining
99
their
initial
after
600
hours
maximum
power
point
tracking
under
1
sun
condition.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 5, 2024
Abstract
Sn
2+
oxidation
and
halide
migration
are
recognized
as
the
major
constraints
for
high‐performance
tin
perovskite
solar
cells
(TPSCs),
they
increase
defect
state
density
thus
decrease
carrier
lifetime
diffusion
length.
In
this
study,
two
chloride
salts
of
thiophene
derivatives
reported
to
interact
with
through
ligand
bonding
immobilize
ions
hydrogen
bonding.
Due
stronger
interactions
between
1‐(2‐thiophene)ethylamine
hydrochloride
(α‐TEACl)
components,
better
passivation
is
realized.
addition,
thanks
coordination
ability,
lattice
stability
enhanced,
photoluminescence
length
substantially
extended
from
4.51
ns
180.78
nm
23.17
ns,
1102.20
nm,
respectively,
which
both
among
highest
values
perovskites.
Consequently,
target
device
α‐TEACl
achieved
a
power
conversion
efficiency
(PCE)
up
14.02%.
At
same
time,
showed
excellent
long‐term
operational
stability,
retaining
≈92%
initial
after
2000
h
aging
in
N
2
atmosphere.
This
work
provides
new
perspective
regulating
ion
lead‐free
ACS Energy Letters,
Год журнала:
2024,
Номер
9(9), С. 4509 - 4515
Опубликована: Авг. 22, 2024
Despite
significant
progress
in
tin-based
perovskites,
the
development
of
stable
and
high-performance
perovskite
solar
cells
(TPSCs)
remains
a
challenge.
In
this
pursuit,
multitude
strategies
have
been
explored,
encompassing
use
reducing
agents,
antioxidants,
bulky
cations,
customized
solvent
systems.
We
propose
an
improved
approach
for
synthesizing
SnI
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 23, 2024
Abstract
Various
popular
large
organic
cations
have
been
extensively
used
as
the
essential
additives
in
perovskite
precursor
solution
due
to
their
satisfactory
passivation
effect
but
may
produce
low‐n
value
(n
≤
2)
2D
phases
with
undesired
distribution.
Meanwhile,
remaining
easy
oxidation
of
Sn
2+
and
p‐type
self‐doping
perovskites
are
also
detrimental
ultimate
photovoltaic
properties
stability
tin
(Sn)‐based
solar
cells
(PSCs).
Here,
3AMPYSnI
4
crystals
(3AMPY
=
3‐(aminomethyl)pyridinium))
designed
applied
adjust
crystallization
process
phase
distribution
Sn‐based
perovskite.
Consequently,
strong
coordination
interaction
between
3AMPY
3D
components
introduced
nucleation
sites
by
not
only
decreases
increases
phase,
inhibits
self‐p‐doping
perovskites,
resulting
lower
trap
density
non‐radiative
recombination
loss,
faster
carrier
extraction
transfer,
higher
for
2D‐3D
PSCs.
As
a
result,
optimized
devices
deliver
an
increased
power
conversion
efficiency
from
initial
10.91%
13.28%
retain
96.0%
original
performance
more
than
3000
h
nitrogen
(N
2
)
atmosphere.
The
Cu(II)-catalyzed
N-heteroannulation
reaction
of
[60]fullerene
(C60)
with
aryl
sulfonamides
and
paraformaldehyde
has
been
disclosed
for
the
synthesis
diverse
C60-fused
imidazolidines,
which
one
or
both
ArSO2
moieties
could
be
removed
selectively.
Further
transformations
into
unexpected
bicyclic
1,2,3,4-adduct
imidazolidinium
iodide
salt
have
also
demonstrated.
A
plausible
mechanism
is
proposed
on
basis
control
experiments.
employed
as
an
additive
in
PC61BM
layer
inverted
planar
perovskite
solar
cells
to
increase
power
conversion
efficiency.
Carbazole-based
self-assembled
small
molecules
are
promising
and
commonly
used
hole
transport
layers
(HTLs)
materials
for
inverted
perovskite
solar
cells
(IPSCs).
Here,
a
novel
perdeuterated
carbazole-based
SAM
named
4PACzd8
is
obtained.
Owing
to
the
deuteration
strategy,
which
causes
reduction
in
molecular
vibration
frequency,
modulates
crystallization
atop
suppresses
interfacial
non-radiative
recombination.
Furthermore,
it
noteworthy
that
demonstrates
heightened
UV
absorption
properties,
thereby
offering
enhanced
protection
underlying
film
from
degradation
resulting
exposure.
Compared
with
non-deuterated
analog
4PACz,
champion
device
employing
showed
higher
power
conversion
efficiency
(PCE)
of
24.87%
excellent
stability.
The
impressive
PCE
by
far
one
highest
values
IPSCs
simple
SAMs
as
HTLs.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 23, 2025
Abstract
Tin
perovskite
solar
cells
are
emerging
as
a
sustainable
lead‐free
alternative
in
thin
film
photovoltaics.
DMSO‐free
processed
tin
perovskites
gaining
interest
due
to
the
detrimental
effects
of
DMSO
on
oxidation.
However,
replacing
with
other
solvents
remains
challenging
accelerated
crystallization
dynamics
non‐DMSO
systems.
In
this
study,
process
solvent
system
is
regulated
by
managing
transition
from
sol‐gel
phase
solid
film.
Specifically,
piperazine
dihydriodide
(PDAI)
and
4‐
tert
‐butylpyridine
(tBP)
utilized
coordinately
tune
colloidal
chemistry
through
forming
large
pre‐nucleation
clusters
ink,
further,
facilitating
formation
process.
By
combining
tBP
PDAI,
controllable
rate
achieved
evidenced
situ
photoluminescence
(PL)
measurement
during
spin‐coating.
As
result,
films
show
high
crystallinity
improved
microstructure.
Devices
treated
tBP+PDAI
exhibit
champion
power
conversion
efficiency
7.8%
excellent
stability
without
observable
degradation
for
over
3000
h
stored
N
2
glovebox.
These
findings
advance
understanding
cells.
The Journal of Physical Chemistry Letters,
Год журнала:
2024,
Номер
15(36), С. 9280 - 9287
Опубликована: Сен. 5, 2024
Nonradiative
charge
recombination,
originating
from
defects,
limits
the
use
of
semiconductors
in
solar
energy
conversion
technologies.
Defect
passivation
is
an
effective
approach
to
eliminating
recombination
centers.
Focusing
on
InSe
semiconductor,
we
have
shown
that
adsorption
configurations
passivators
a
strong
impact
defect
passivation,
using
nonadiabatic
molecular
dynamics
combined
with
time-dependent
density
functional
theory.
The
simulations
demonstrate
physisorption
passivator
cannot
eliminate
centers,
resulting
fast
nonradiative
recombination.
By
contrast,
chemisorption
are
able
form
covalent
bonds
indium,
remove
thereby
prolonging
time
by
more
than
factor
10
because
decreased
coupling
and
channels
for
losses.
This
study
uncovers
microscopic
effects
photogenerated
carrier
dynamics,
suggesting
essential
passivation.
The Journal of Physical Chemistry A,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 24, 2024
The
investigation
into
the
interfacial
properties
between
fullerene
compounds
and
Sn-based
perovskites
(Sn-PVSK)
holds
extraordinary
significance
for
advancing
efficient
stable
Pb-free
perovskite
solar
cells.
This
study
is
first
theoretical
exploration
to
examine
their
using
Ab
initio
molecular
dynamics
(AIMD)
simulations
trajectory
analysis
methods
with
C60@FASnI
