ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 26, 2025
The
application
of
promising
perovskite
light-emitting
diodes
(PeLEDs)
faces
a
significant
challenge
known
as
efficiency
roll-off,
which
refers
to
the
decline
in
external
quantum
(EQE)
at
high
current
densities.
This
issue
arises
mainly
from
trap
densities
films
and
imbalanced
carrier
injection,
limit
improvements
brightness
stability
PeLEDs.
Here,
we
develop
green
solvent
strategy
using
γ-valerolactone
(GVL)
suppress
roll-off
effectively
slows
down
crystallization
kinetics,
yielding
cubic-phase
formamidinium
lead
triiodide
(α-FAPbI3)
with
reduced
states,
enhanced
charge
suppressed
Auger
recombination.
As
result,
achieve
record
radiance
1411
W
sr–1
m–2
for
GVL-based
These
PeLEDs
exhibit
substantially
maintaining
an
EQE
above
20%
even
density
900
mA
cm–2.
Our
findings
highlight
potential
approach
developing
high-brightness,
high-efficiency
practical
applications.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(25)
Published: Feb. 7, 2024
Abstract
Inverted
perovskite
solar
cells
(IPSCs)
have
attracted
unprecedented
attention
due
to
their
negligible
hysteresis,
long‐term
operational
stability,
low
temperature,
and
cost‐effective
fabrication
process,
as
well
wide
applications.
The
power
conversion
efficiency
(PCE)
of
IPSCs
has
skyrocketed
from
3.9%
in
2013
certified
26.1%
2023,
which
is
over
the
25.8%
regular
counterpart,
benefiting
emergence
a
great
number
organic
hole‐transporting
materials
(HTM).
This
review
provides
an
overview
recent
development
stability
IPSCs,
including
small
molecules
conjugated
conductive
polymers.
effective
strategies
for
charge‐transport
layer
films
are
also
discussed.
Finally,
prospective
further
outlined,
developing
novel
fabricating
techniques
meet
requirements
commercial
application.
Abstract
In
just
over
a
decade,
certified
single-junction
perovskite
solar
cells
(PSCs)
boast
an
impressive
power
conversion
efficiency
(PCE)
of
26.1%.
Such
outstanding
performance
makes
it
highly
viable
for
further
development.
Here,
we
have
meticulously
outlined
challenges
that
arose
during
the
industrialization
PSCs
and
proposed
their
corresponding
solutions
based
on
extensive
research.
We
discussed
main
in
this
field
including
technological
limitations,
multi-scenario
applications,
sustainable
development,
etc.
Mature
photovoltaic
provide
community
with
invaluable
insights
overcoming
industrialization.
upcoming
stages
advancement,
has
become
evident
addressing
concerning
long-term
stability
sustainability
is
paramount.
manner,
can
facilitate
more
effective
integration
into
our
daily
lives.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(17)
Published: March 1, 2024
Tin
halide
perovskites
(THPs)
have
demonstrated
exceptional
potential
for
various
applications
owing
to
their
low
toxicity
and
excellent
optoelectronic
properties.
However,
the
crystallization
kinetics
of
THPs
are
less
controllable
than
its
lead
counterpart
because
higher
Lewis
acidity
Sn
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 23, 2025
Perovskite
solar
cells
(PSCs)
have
emerged
as
low-cost
photovoltaic
representatives.
Constructing
three-dimensional
(3D)/two-dimensional
(2D)
perovskite
heterostructures
has
been
shown
to
effectively
enhance
the
efficiency
and
stability
of
PSCs.
However,
further
enhancement
device
performance
is
still
largely
limited
by
inferior
conductivity
2D
capping
layer
its
mismatched
energy
level
with
3D
layer.
Here,
we
developed
an
effective
surface
modification
strategy
via
synergically
incorporating
inorganic
high
valence-state
niobium
ion
(Nb5+)
metal
dopants
organic
ammonium
halide
salts
in
situ
construct
a
high-quality
on
top
underlying
As
result,
was
enhanced
43%,
barrier
between
layers
favorably
reduced,
built-in
electric
field
3D/2D
heterostructured
stacks
enlarged.
In
addition,
also
reduced
defect
densities
up
29%,
verified
space-charge-limited-current
(SCLC)
tests.
Benefiting
from
facilitated
charge
extraction
suppressed
non-radiative
recombination,
blade-coated
hole
transport
layer-free
PSCs
based
this
optimized
film
achieved
23.2%,
∼19%
higher
than
that
control
(19.5%),
which
represented
one
best-performing
simplified
architecture
fabricated
scalable
fabrication
technique.
The
modified
perovskite-based
exhibited
improved
operational
stability.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(38)
Published: Aug. 4, 2023
The
2D/3D
perovskite
heterostructures
have
been
widely
investigated
to
enhance
the
efficiency
and
stability
of
solar
cells
(PSCs).
However,
rational
manipulation
phase
distribution
energy
level
alignment
in
such
hybrids
are
still
great
challenge.
Herein,
we
successfully
achieved
spontaneous
by
concurrently
introducing
both
2D
component
organic
halide
additive.
graded
perovskites
with
different
n
values
3D
induced
favorable
band
across
film
boosted
charge
transfer
at
relevant
heterointerfaces.
Moreover,
also
acted
as
a
"band-aid"
simultaneously
passivate
defects
release
residual
tensile
stress
films.
Encouragingly,
blade-coated
PSCs
based
on
only
≈2
s
in-situ
fast
annealed
films
funnels
toughened
heterointerfaces
promising
efficiencies
22.5
%,
accompanied
extended
lifespan.
To
our
knowledge,
this
is
highest
reported
for
fabricated
energy-saved
thermal
treatment
just
within
few
seconds,
which
outperformed
those
state-of-the-art
annealing-free
analogues.
Such
two-second-in-situ-annealing
technique
could
save
cost
up
99.6
%
during
device
fabrication,
will
grant
its
low-coast
implementation.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(51)
Published: Aug. 12, 2023
Upscalable
printing
of
high-performance
and
stable
perovskite
solar
cells
(PSCs)
is
highly
desired
for
commercialization.
However,
the
efficiencies
printed
PSCs
lag
behind
those
their
lab-scale
spin-coated
counterparts
owing
to
lack
systematic
understanding
control
over
crystallization
dynamics.
Here,
controlled
dynamics
achieved
using
an
additive
1-butylpyridine
tetrafluoroborate
(BPyBF4
)
high-quality
ambient
α-formamidinium
lead
triiodide
(FAPbI3
films
are
reported.
Using
in
situ
grazing-incidence
wide-angle
X-ray
scattering
optical
diagnostics,
spontaneous
formation
α-FAPbI3
from
precursors
during
without
involvement
δ-FAPbI3
demonstrated.
The
addition
BPyBF4
delays
onset
,
enhances
conversion
sol-gel
perovskite,
reduces
stacking
defects
printing.
Therefore,
altered
results
fewer
voids,
larger
grains,
less
trap-induced
recombination
loss
within
films.
yield
high
power
23.50%
21.60%
a
0.09
cm-2
area
device
5
cm
×
cm-area
module,
respectively.
Improved
stability
further
demonstrated,
i.e.,
approximately
94%
initial
efficiency
retained
2400
h
under
conditions
encapsulation.
This
study
provides
effective
method
manufacture
large-area
PSCs.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(9)
Published: Oct. 12, 2023
Abstract
The
critical
requirement
for
ambient‐printed
formamidinium
lead
iodide
(FAPbI
3
)
lies
in
the
control
of
nucleation–growth
kinetics
and
defect
formation
behavior,
which
are
extensively
influenced
by
interactions
between
solvent
perovskite.
Here,
a
strategy
is
developed
that
combines
cosolvent
an
additive
to
efficiently
tailor
coordination
Through
situ
characterizations,
direct
crystallization
from
sol–gel
phase
α‐FAPbI
illustrated.
When
exhibits
strong
with
perovskite,
phases
cannot
effectively
transform
into
,
resulting
lower
nucleation
rate
confined
crystal
growth
directions.
Consequently,
it
becomes
challenging
fabricate
high‐quality
void‐free
perovskite
films.
Conversely,
weaker
solvent–perovskite
promotes
.
This
process
more
balanced
restrains
defects
microstrains
situ.
leads
improved
structural
optoelectronic
properties
within
FAPbI
films,
characterized
compact
grain
stacking,
smoother
surface
morphology,
released
lattice
strain,
fewer
defects.
solar
cells
fabricated
using
this
exhibit
remarkable
power
conversion
efficiency
24%,
significantly
reduced
deviation
negligible
decreases
stabilized
output.
