Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 10, 2025
Abstract
The
dipole
moment
of
hole
transport
materials
(HTMs)
plays
a
vital
role
in
improving
the
photovoltaic
performance
inverted
perovskite
solar
cells
(PSCs).
However,
manipulating
moments
polymer
HTMs,
which
have
great
operational
and
bias
stability,
remains
challenging.
In
this
work,
HTMs
with
varying
lengths
glycol
side
chains,
PTAC‐DEG
PTAC‐TEG,
are
developed.
Using
random‐walk
model
extended
from
chain
conformation,
(with
shorter
chains)
achieves
higher
cumulative
than
PTAC‐TEG.
This
finding
can
be
attributed
to
fact
that
smaller
angles
enable
better
alignment,
while
larger
PTAC‐TEG
promote
aggregation
reduces
integrated
moment.
Perovskite
films
on
show
enhanced
crystallinity
lower
trap
density
due
improved
interfacial
charge
transport,
stronger
built‐in
electric
field,
affinity
dipole.
devices
achieve
PCE
25.8%,
is
among
highest
for
PSCs
based
exhibit
outstanding
stability
under
ISOS‐L‐3
(t
95
=
1300
h)
ISOS‐D‐3
1200
conditions.
study
highlights
modulation
as
promising
strategy
designing
efficient,
stable
cells.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Sept. 1, 2024
Self-assembled
monolayers
(SAMs)
have
become
pivotal
in
achieving
high-performance
perovskite
solar
cells
(PSCs)
and
organic
(OSCs)
by
significantly
minimizing
interfacial
energy
losses.
In
this
study,
we
propose
a
co-adsorb
(CA)
strategy
employing
novel
small
molecule,
2-chloro-5-(trifluoromethyl)isonicotinic
acid
(PyCA-3F),
introducing
at
the
buried
interface
between
2PACz
perovskite/organic
layers.
This
approach
effectively
diminishes
2PACz's
aggregation,
enhancing
surface
smoothness
increasing
work
function
for
modified
SAM
layer,
thereby
providing
flattened
with
favorable
heterointerface
perovskite.
The
resultant
improvements
crystallinity,
minimized
trap
states,
augmented
hole
extraction
transfer
capabilities
propelled
power
conversion
efficiencies
(PCEs)
beyond
25%
PSCs
p-i-n
structure
(certified
24.68%).
OSCs
CA
achieve
remarkable
PCEs
of
19.51%
based
on
PM1:PTQ10:m-BTP-PhC6
photoactive
system.
Notably,
universal
also
been
achieved
other
two
popular
OSC
systems.
After
1000-hour
maximal
point
tracking,
encapsulated
retain
approximately
90%
80%
their
initial
PCEs,
respectively.
introduces
facile,
rational,
effective
method
to
enhance
performance
SAMs,
realizing
efficiency
breakthroughs
both
device
structure,
along
improved
operational
stability.
are
essential
high
Here,
authors
develop
molecule
provide
heterointerface,
devices.
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(17), P. 6157 - 6203
Published: Jan. 1, 2024
HSSAMs
with
diverse
structures,
encompassing
various
anchoring
and
functional
groups,
were
systematically
categorized
their
multifaceted
roles
in
inverted
PSCs
TSCs
correlation
device
performance
investigated.
Nature Communications,
Journal Year:
2025,
Volume and Issue:
16(1)
Published: Feb. 1, 2025
Carrier
transport
and
recombination
at
the
buried
interface
of
perovskite
have
seriously
restricted
further
development
inverted
solar
cells
(PSCs).
Herein,
an
interfacial
dipolar
chemical
bridge
strategy
to
address
this
issue
is
presented.
2-(Diphenylphosphino)
acetic
acid
(2DPAA)
selected
as
linker
reconstruct
dipole,
which
effectively
enlarges
dipole
moment
5.10
D
optimizes
a
positive
orientation,
thereby
accelerating
vertical
hole
transport,
suppressing
nonradiative
promoting
crystallization.
The
champion
device
yields
high
power
conversion
efficiency
(PCE)
26.53%
(certified
26.02%).
Moreover,
extended
wide-bandgap
large-area
devices,
delivers
PCEs
22.02%
24.11%,
respectively.
optimized
devices
without
encapsulation
also
demonstrate
great
long-term
shelf
operational
stability.
Our
work
highlights
importance
orientation
realize
efficient
stable
PSCs.
hindered
cells.
Here,
authors
employ
achieving
maximum
24.11%
for
small-
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
147(9), P. 8004 - 8011
Published: Feb. 18, 2025
Self-assembled
monolayer
molecules
have
been
widely
employed
as
interfacial
transport
materials
in
inverted
perovskite
solar
cells
(PSCs),
demonstrating
high
efficiency
and
improved
device
stability.
However,
self-assembling
(SAM)
often
suffer
from
aggregation
weak
interactions
with
the
layer,
resulting
inefficient
charge
transfer
significant
energy
losses,
ultimately
limiting
power
conversion
long-term
stability
of
cells.
In
this
work,
we
developed
a
series
novel
skeleton-matching
carbazole
isomer
SAMs
based
on
following
key
design
principles:
(1)
introducing
benzene
ring
structure
to
distort
molecular
skeleton
SAM,
thereby
preventing
achieving
uniform
distribution
fluorine-doped
tin
oxide
(FTO)
substrates;
(2)
strategically
incorporating
methoxy
groups
onto
at
different
positions
(ortho,
meta,
para).
These
functional
not
only
increase
anchoring
points
layer
but
also
fine-tune
dipole
moment.
Among
SAMs,
m-PhPACz
exhibits
most
favorable
properties,
maximum
moment
2.4
D
an
O-O
distance
that
aligns
excellently
diagonal
lead
ions
adjacent
lattice,
enhancing
SAM-perovskite
interactions,
facilitating
efficient
extraction,
improving
As
result,
new
SAM-based
PSCs
achieved
impressive
26.2%,
12.9%
improvement.
Moreover,
devices
demonstrated
outstanding
photothermal
stability,
retaining
96%
their
initial
PCE
after
1000
h
85
°C
maintaining
90%
300
UV-light
exposure.
Advanced Energy Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 5, 2025
Abstract
The
interfaces
of
each
layer
in
perovskite
solar
cells
(PSCs)
have
a
significant
impact
on
the
charge
transfer
and
recombination.
Especially,
interface
between
hole
transport
(HTL)
p‐i‐n
type
PSCs
significantly
affects
contact
characteristics
HTL
perovskite,
hindering
further
improvements
performance
stability.
Herein,
small
molecule
9‐Fluorenylmethoxycarbonyl
chloride
(9‐YT)
is
introduced
as
bridge
for
PSCs,
which
enhances
interaction
self‐assembly
molecules
(SAMs)
perovskite.
conjugated
backbone
9‐YT
can
interact
with
SAM
(MeO‐2PACz)
by
π–π
stacking
reaction.
Moreover,
also
improves
interfacial
through
strong
interactions
where
carbonyl
groups
Cl
atoms
uncoordinated
Pb
2+
layer.
incorporation
demonstrated
to
markedly
enhance
extraction
at
perovskite/hole
interface,
optimize
energy
level
alignment,
mitigate
recombination,
passivate
defects
Finally,
device
treated
achieves
power
conversion
efficiency
(PCE)
24.82%.
At
same
time,
still
maintain
92.6%
original
PCE
after
long‐term
stability
test
1200
h.
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 30, 2024
Through
a
bimolecular
energy-level-tunable
design,
an
ET-HTL
reaches
optimal
energy
level
alignment
with
three
different
perovskite
compositions,
providing
balanced
interface
defect
passivation,
charge
extraction,
and
transition
loss
suppression.
ACS Energy Letters,
Journal Year:
2024,
Volume and Issue:
9(9), P. 4209 - 4217
Published: Aug. 1, 2024
Improving
the
uniformity
and
density
of
self-assembled
monolayers
(SAMs)
is
crucial
to
elevate
photovoltaic
performance
organic
solar
cells
(OSCs).
Herein,
we
introduced
small
molecules
1-hydroxybenzotriazole
(HOBT)
modulate
distribution
electrical
properties
(4-(7H-dibenzo[c,g]carbazol-7-yl)butyl)phosphonic
acid
(4PADCB)
on
indium
tin
oxide
(ITO)
transparent
electrodes
in
an
innovative
manner.
The
hydroxyl
group
HOBT
interacts
with
phosphate
SAMs,
while
steric
repulsion
exerted
by
backbone
efficiently
regulates
SAMs.
This
led
a
more
uniform
dense
SAMs
ITO.
Furthermore,
HOBT-modified
have
improved
crystallization
vertical
phase
separation
upper
active
layer.
Consequently,
PM6:BTP-eC9
binary
OSCs
based
exhibit
impressive
PCE
19.66%.
Our
work
presents
effective
strategy
for
regulating
SAM
morphology
offers
promising
approach
advancing
OSCs.
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(19), P. 6974 - 7016
Published: Jan. 1, 2024
This
review
overviews
the
challenges
at
buried
interface
of
PSCs,
defect
passivation
capabilities
SAMs,
and
its
effectiveness
compared
to
other
passivating
agents.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 30, 2024
Abstract
Self‐assembled
monolayers
(SAM)
as
hole
transport
layers
have
been
widely
used
in
high‐efficiency
inverted
perovskite
solar
cells
(PSCs)
exceeded
26
%.
However,
the
poor
coverage
and
non‐uniform
distribution
on
substrate
of
SAM
further
restrict
improvement
device
performance.
Herein,
we
utilize
mixed
strategy
via
MeO‐2PACz
along
with
perfluorotripropylamine
(FC‐3283)
to
improve
coverage,
aiming
accelerate
carrier
transport,
promote
growth,
regulate
surface
energy
levels
suppress
nonradiative
recombination.
The
champion
mixed‐SAM
achieves
an
efficiency
25.70
%
(certified
25.6
%)
long‐term
stability
(maintained
initial
90
after
1000
h
180
under
ISOS‐L‐1
ISOS‐L‐2).