Flexible
perovskite
solar
cells
(F-PSCs)
have
attracted
enormous
research
interest
in
wearable
and
portable
electronics
because
of
their
lightweight,
high
flexibility
portability.
However,
power
conversion
efficiency
(PCE)
stability
still
lag
far
behind
rigid
devices
the
soft
inhomogeneous
nature
flexible
substrate
utilized
F-PSCs.
Herein,
we
introduce
MeO-2PACz
as
self-assembled
monolayers
(SAMs)
to
modify
perovskite/HTL
(hole
transport
layer)
interface
F-PSCs
high-quality
thin
films
are
grown.
In
addition,
owing
coordination
reaction
between
phosphonic
acid
group
Pb2+
SAMs,
defects
lattice
passivated
effectively,
trap
states
probability
trap-assisted
nonradiative
recombination
reduced.
Finally,
impressive
PCE
15.34%
is
achieved
with
superior
SAM-modified
device,
compared
control
device
a
13.27%.
Through
this
work,
provide
valuable
insights
references
for
further
investigation
utilization
SAMs
inverted
F-
PSCs
applications.
Science,
Journal Year:
2024,
Volume and Issue:
385(6705), P. 161 - 167
Published: July 11, 2024
Black-phase
formamidinium
lead
iodide
(α-FAPbI
3
)
perovskites
are
the
desired
phase
for
photovoltaic
applications,
but
water
can
trigger
formation
of
photoinactive
impurity
phases
such
as
δ-FAPbI
.
We
show
that
classic
solvent
system
perovskite
fabrication
exacerbates
this
reproducibility
challenge.
The
conventional
coordinative
dimethyl
sulfoxide
(DMSO)
promoted
under
high
relative
humidity
(RH)
conditions
because
its
hygroscopic
nature.
introduced
chlorine-containing
organic
molecules
to
form
a
capping
layer
blocked
moisture
penetration
while
preserving
DMSO-based
complexes
regulate
crystal
growth.
report
power
conversion
efficiencies
>24.5%
solar
cells
fabricated
across
an
RH
range
20
60%,
and
23.4%
at
80%
RH.
unencapsulated
device
retained
96%
initial
performance
in
air
(with
40
60%
RH)
after
500-hour
maximum
point
operation.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 2, 2024
Abstract
Efficient
and
stable
red
perovskite
light‐emitting
diodes
(PeLEDs)
demonstrate
promising
potential
in
high‐definition
displays
biomedical
applications.
Although
significant
progress
has
been
made
device
performance,
meeting
commercial
demands
remains
a
challenge
the
aspects
of
long‐term
stability
high
external
quantum
efficiency
(EQE).
Here,
an
situ
crystallization
regulation
strategy
is
developed
for
optimizing
films
through
ingenious
vapor
design.
Mixed
containing
dimethyl
sulfoxide
carbon
disulfide
(CS
2
)
incorporated
to
conventional
annealing,
which
contributes
thermodynamics
dominated
well‐aligned
cascade
phase
arrangement.
Additionally,
surface
defect
density
minimized
by
CS
molecule
adsorption.
Consequently,
target
exhibit
smooth
exciton
energy
transfer,
reduced
density,
blocked
ion
migration
pathways.
Leveraging
these
advantages,
spectrally
PeLEDs
are
obtained
featuring
emission
at
668,
656,
648
nm,
yield
record
peak
EQEs
30.08%,
32.14%,
29.04%,
along
with
prolonged
half‐lifetimes
47.7,
60.0,
43.7
h
initial
luminances
140,
250,
270
cd
m
−2
,
respectively.
This
work
provides
universal
represents
stride
toward
commercialization
PeLEDs.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
14(24)
Published: April 29, 2024
Abstract
Modulating
perovskite
crystallization
and
understanding
hot
carriers
(HCs)
dynamics
in
films
are
very
critical
to
achieving
high‐performance
solar
cells
(PSCs).
Herein,
a
small
organic
molecule
(6BAS)
with
multisite
anchors
(C═O)
as
an
efficient
additive
is
introduced
into
PbI
2
precursors
modulate
during
two‐step
sequential
deposition.
The
chemical
interaction
between
6BAS
enables
more
preferential
crystal
enlarged
interplanar
spacing
of
lattice,
which
beneficial
the
penetration
ammonium
salts
layer
complete
conversion
perovskite,
consequently
promoting
realize
high‐quality
larger
grain
size
reduced
defect
state.
By
ultrafast
spectroscopy,
it
found
that
incorporation
can
efficiently
prolong
HCs
cooling,
helps
enhance
transfer
retard
charge
carrier
recombination
device.
As
result,
doped‐PSCs
efficiency
significantly
enhances
25.32%
from
22.91%.
target
device
achieves
enhanced
long‐term
stability.
Only
6%
degradation
realized
for
un‐encapsulated
after
70
days
under
N
.
Meanwhile,
6BAS‐treated
retains
95%
its
initial
PCE
1160
h
operation
at
maximum
power
point
continuous
AM
1.5
G
illumination.
Nano-Micro Letters,
Journal Year:
2025,
Volume and Issue:
17(1)
Published: Jan. 10, 2025
Abstract
Organic
additives
with
multiple
functional
groups
have
shown
great
promise
in
improving
the
performance
and
stability
of
perovskite
solar
cells.
The
can
passivate
undercoordinated
ions
to
reduce
nonradiative
recombination
losses.
However,
how
these
synergistically
affect
enhancement
beyond
passivation
is
still
unclear.
Specifically,
isomeric
molecules
different
substitution
patterns
or
molecular
shapes
remain
elusive
designing
new
organic
additives.
Here,
we
report
two
carbazolyl
bisphosphonate
additives,
2,7-CzBP
3,6-CzBP.
isomerism
effect
on
charge
transport
process
was
studied.
similar
effects
through
interactions,
e.g.,
P
=
O···Pb,
O···H–N
N–H···I.
further
bridge
crystallites
facilitates
transport.
Power
conversion
efficiencies
(PCEs)
25.88%
21.04%
were
achieved
for
0.09
cm
2
devices
14
modules
after
treatment,
respectively.
exhibited
enhanced
operational
maintaining
95%
initial
PCE
1000
h
continuous
maximum
power
point
tracking.
This
study
hints
at
importance
tuning
positions
which
paves
way
innovation
next-generation
multifunctional
aromatic
Exploration,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 6, 2025
ABSTRACT
Perovskite
solar
cells
(PSCs)
have
attracted
considerable
attention
due
to
their
potential
for
high‐efficiency
conversion
and
cost‐effective
fabrication.
Although
the
fabrication
of
perovskite
films
in
ambient
air
offers
environmental
cost
advantages,
presence
water
vapor
oxygen
may
induce
instability
these
films,
thereby
affecting
device
performance.
This
review
aims
comprehensively
explore
recent
advancements
PSCs
air,
while
investigating
various
factors
contributing
degradation.
Addressing
challenges,
diverse
strategies
are
outlined,
encompassing
compositional,
additive,
solvent,
interface
engineering
enhance
performance
stability
fabricated
under
air.
To
facilitate
commercialization
PSCs,
this
paper
summarizes
several
widely
employed
methods
large‐scale
manufacturing
PSCs.
Through
review,
we
aim
offer
some
invaluable
insights
guidance
trajectory
as
well
pros
cons
widespread
applications
field
renewable
energy.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: May 13, 2024
Abstract
The
trap
state
at
the
surfaces
and
grain
boundaries
of
perovskite
is
one
major
obstacles
to
further
commercialization
flexible
solar
cells
(FPSCs).
Herein,
two
innovative
multifunctional
fluorinated
propylamine
salt
2,2,3,3,3‐pentafluoropropylamine
hydrochloride
(PFPACl)
3,3,3‐triflupropylamine
(TFPACl)
are
in
situ
introduced
onto
photo
absorbing
layer
improve
performance
FPSCs.
nuclear
magnetic
resonance
(NMR)
spectroscopy
indicates
strong
interactions
both
PFPACl
TFPACl
with
precursor
components.
For
first
time,
structures
supramolecular
complexes
formed
by
additives
FAI
deduced
from
NOESY
NMR
data,
thus
pointing
importance
preorganization
components
solution
before
film
casting.
experiments
density
functional
theory(DFT)
calculations
reveal
that
likely
dissociated
more
into
form
R‐NH
3
+
‐Cl
−
due
higher
electronegativity
fluoroalkyl
tail.
Therefore,
PFPA
binds
strongly
V
FA
defects
than
TFPA
,
anion
Cl
has
enough
interaction
uncoordinated
Pb
2+
leading
homogeneous
coverage
on
entire
surface
films
better
energy
alignment
hole
transport
layer.
Consequently,
PFPACl‐treated
FPSCs
achieved
a
relatively
high
PCE
23.59%
excellent
mechanical
robustness
operational
stability.
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: April 29, 2024
Abstract
In
perovskite
solar
cells
(PSCs),
the
inherent
defects
of
film
and
random
distribution
excess
lead
iodide
(PbI
2
)
prevent
improvement
efficiency
stability.
Herein,
natural
cellulose
is
used
as
raw
material
to
design
a
series
derivatives
for
crystallization
engineering.
The
cationic
derivative
C-Im-CN
with
cyano-imidazolium
(Im-CN)
cation
chloride
anion
prominently
promotes
process,
grain
growth,
directional
orientation
perovskite.
Meanwhile,
PbI
transferred
surface
grains
or
formed
plate-like
crystallites
in
local
domains.
These
effects
result
suppressing
defect
formation,
decreasing
boundaries,
enhancing
carrier
extraction,
inhibiting
non-radiative
recombination,
dramatically
prolonging
lifetimes.
Thus,
PSCs
exhibit
high
power
conversion
24.71%.
Moreover,
has
multiple
interaction
sites
polymer
skeleton,
so
unencapsulated
maintain
above
91.3%
their
initial
efficiencies
after
3000
h
continuous
operation
conventional
air
atmosphere
have
good
stability
under
humidity
conditions.
utilization
biopolymers
excellent
structure-designability
manage
opens
state-of-the-art
avenue
manufacturing
improving
PSCs."Image
missing"
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(32)
Published: May 29, 2024
The
non-uniform
distribution
of
colloidal
particles
in
perovskite
precursor
results
an
imbalanced
response
to
the
shear
force
during
flexible
printing
process.
Herein,
it
is
observed
that
continuous
disordered
migration
occurring
inks
significantly
contributes
enlargement
size
and
diminishes
crystallization
activity
inks.
Therefore,
a
molecular
encapsulation
architecture
by
glycerol
monostearate
mitigate
collisions
ink,
while
simultaneously
homogenizing
colloids
minimize
their
diffusion
disparities,
devised.
utilization
with
structure
enables
achievement
uniform
deposition
process,
thereby
effectively
balancing
rate
phase
transition
film
facilitating
homogeneous
films.
large-area
device
(1.01
cm
The Journal of Physical Chemistry Letters,
Journal Year:
2024,
Volume and Issue:
15(15), P. 4015 - 4023
Published: April 5, 2024
Wide-bandgap
(WBG)
perovskites
play
a
crucial
role
in
perovskite-based
tandem
cells.
Despite
recent
advances
using
self-assembled
monolayers
(SAMs)
to
facilitate
efficiency
breakthroughs,
achieving
precise
control
over
the
deposition
of
such
ultrathin
layers
remains
significant
challenge
for
large-scale
fabrication
WBG
perovskite
and,
consequently,
modules.
To
address
these
challenges,
we
propose
facile
method
that
integrates
MeO-2PACz
and
Me-4PACz
optimal
proportions
(Mixed
SAMs)
into
precursor
solution,
enabling
simultaneous
codeposition
SAMs.
This
technique
promotes
spontaneous
formation
charge-selective
contacts
while
reducing
defect
densities
by
coordinating
phosphonic
acid
groups
with
unbonded
Pb2+
ions
at
bottom
interface.
The
resulting
solar
cells
(PSCs)
demonstrated
power
conversion
19.31%
small-area
devices
(0.0585
cm2)
17.63%
large-area
modules
(19.34
cm2),
highlighting
potential
this
strategy
fabricating
high-performance,
PSCs
enhanced
reproducibility.
These
findings
offer
valuable
insights
advancing
scalable