ACS Photonics,
Journal Year:
2024,
Volume and Issue:
11(11), P. 4682 - 4690
Published: Oct. 25, 2024
Although
inorganic
perovskite
solar
cells
(PSCs)
have
made
remarkable
progress,
ambient
instability
and
serious
nonradiative
recombination
loss
greatly
impede
their
further
development.
Herein,
we
develop
a
novel
surface
reconstruction
process
to
in
situ
grow
2D
capping
layer
on
3D
CsPbI2Br
via
the
dynamic
methanol
treatment
subsequent
thermal
annealing
for
simultaneously
enhancing
stability
suppressing
of
PSCs.
The
removes
defective
regions
results
forming
excessive
PbI2
surface,
triggers
reaction
with
that
leads
CsPb2I4Br
which
effectively
decreases
defect
density
enhances
perovskite.
As
result,
fabricated
carbon-based
PSC
displays
power
conversion
efficiency
14.29%.
Moreover,
device
superior
stability,
cell
without
encapsulation
remains
at
over
90%
original
value
after
storing
conditions
900
h.
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: May 23, 2024
Perovskite
solar
cells
(PSCs)
offer
low
costs
and
high
power
conversion
efficiency.
However,
the
lack
of
long-term
stability,
primarily
stemming
from
interfacial
defects
susceptible
metal
electrodes,
hinders
their
practical
application.
In
past
few
years,
two-dimensional
(2D)
materials
(e.g.,
graphene
its
derivatives,
transitional
dichalcogenides,
MXenes,
black
phosphorus)
have
been
identified
as
a
promising
solution
to
solving
these
problems
because
dangling
bond-free
surfaces,
layer-dependent
electronic
band
structures,
tunable
functional
groups,
inherent
compactness.
Here,
recent
progress
2D
material
toward
efficient
stable
PSCs
is
summarized,
including
role
both
interface
electrodes.
We
discuss
beneficial
effects
on
perovskite
growth,
energy
level
alignment,
defect
passivation,
well
blocking
external
stimulus.
particular,
unique
properties
form
van
der
Waals
heterojunction
at
bottom
are
emphasized.
Finally,
perspectives
further
development
using
provided,
such
designing
high-quality
heterojunction,
enhancing
uniformity
coverage
nanosheets,
developing
new
materials-based
Tin–lead
(Sn–Pb)
mixed
perovskites
have
emerged
as
promising
light-absorbing
materials
for
single-junction
and
all-perovskite
tandem
solar
cells
due
to
their
favorable
narrow
bandgaps
high
theoretical
power
conversion
efficiencies.
However,
the
easy
oxidation
of
Sn2+
Sn4+
results
in
formation
rampant
defects
during
fast
crystallization
Sn–Pb
perovskite
thin
films
remarkable
photovoltaic
performance
decay
under
operation,
impeding
practical
applications.
Herein,
this
spotlight
presents
intrinsic
origins
instability
summarizes
recent
advances
antioxidation
strategies
regarding
raw
material
purification,
additive
engineering,
composition
interfacial
engineering.
Then,
remaining
challenges
future
directions
are
discussed
inspire
more
rational
design
toward
efficient
durable
cells.
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(16), P. 5984 - 5992
Published: Jan. 1, 2024
Suppressing
side
reactions
led
to
the
formation
of
rational
Dion–Jacobson
2D/3D
surface
heterostructures,
achieving
an
optimal
PCE
23.05%
(certified
22.58%)
for
1.68
eV
perovskite
solar
cells.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: May 31, 2024
The
planar
triple-layer
hole
transport
layer
(HTL)-free
carbon-based
perovskite
solar
cells
(C-PSCs)
have
outstanding
advantages
of
low
cost
and
high
stability,
but
are
limited
by
efficiency.
formation
a
3D/2D
heterojunction
has
been
widely
proven
to
enhance
device
performance.
However,
the
2D
possesses
multiple
critical
properties
associated
with
3D
perovskite,
including
defect
passivation,
energy
level,
charge
properties,
all
which
can
impact
It
is
challenging
find
powerful
means
achieve
comprehensive
regulation
trade-off
these
key
properties.
Herein,
we
propose
chain-length
engineering
alkylammonium
spacer
cations
this
goal.
results
show
that
formed
short-chain
primarily
acts
passivate
defects.
With
increase
in
cation
chain
length,
achieves
more
matched
level
enhancing
built-in
electric
field
promoting
separation.
further
length
impedes
due
insulativity
organic
cations.
Comprehensively,
tetradecylammonium
optimal
balance
interface
separation,
transport.
HTL-free
C-PSCs
exhibit
new
record
efficiency
20.40
%
(certified
20.1
%).
Nano-Micro Letters,
Journal Year:
2025,
Volume and Issue:
17(1)
Published: Feb. 8, 2025
Quasi-two-dimensional
(2D)
perovskite
embodies
characteristics
of
both
three-dimensional
(3D)
and
2D
perovskites,
achieving
the
superior
external
environment
stability
structure
perovskites
alongside
high
efficiency
3D
perovskites.
This
effect
is
realized
through
critical
structural
modifications
in
device
fabrication.
Typically,
have
an
octahedral
structure,
generally
ABX3,
where
organic
ammonium
cation
(A')
participates
forming
with
A'(n)
(n
=
1
or
2)
sandwiched
between
A(n-1)B(n)X(3n+1)
layers.
Depending
on
whether
A'
a
monovalent
divalent
cation,
are
classified
into
Ruddlesden-Popper
Dion-Jacobson
perovskite,
each
generating
different
structures.
Although
achieves
similar
effects,
they
incorporate
distinct
mechanisms
their
formation.
And
according
to
these
structures,
various
properties
appear,
additive
optimizing
methods
increase
also
exist
In
this
review,
scientific
understanding
engineering
perspectives
quasi-2D
investigated,
optimal
optimization
discussed
provide
insight
field.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 12, 2024
Abstract
Organic–inorganic
hybrid
perovskite
solar
cells
(HPSCs)
are
gaining
attention
as
a
promising
technology
for
next‐generation
photovoltaic
devices
owing
to
their
impressive
power
conversion
efficiency
(PCE)
and
cost‐effective
fabrication
methods.
Although,
solution‐processed
passivation
using
2D
perovskites
can
improve
the
interface
recombination,
this
approach
hampers
its
effective
charge
transportation.
In
study,
study
investigates
properties
performance
of
bilayer
3D/3D
methylammonium
lead
iodide
(MAPbI
3
)/formamidinium
(FAPbI
)‐based
heterojunction
(BPHJ)
address
these
concerns.
The
structure
consists
two
distinct
absorbers
having
independent
that
sandwiched
between
transporting
layer
(CTLs)
make
functional
device.
First,
process
is
optimized
achieve
high‐quality
MAPbI
films
with
controlled
morphology
crystallinity
followed
by
formation
BPHJ
FAPbI
deposition
thermal
evaporation
technique.
BPHJ‐160
nm‐based
PSCs
parameters
exhibit
an
enhanced
PCE
23.08%
compared
single‐layer
reference
(20.15%)
improved
be
attributed
extraction
at
reduced
recombination
losses
due
favorable
energy
levels.
Furthermore,
long‐term
stability
BPHJ‐based
device
assessed
under
continuous
illumination
along
ambient
across
different
environmental
conditions.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(15), P. 19849 - 19857
Published: April 4, 2024
Two-dimensional
(2D)
perovskites
have
been
widely
adopted
for
improving
the
performance
and
stability
of
three-dimensional
(3D)
metal
halide
perovskite
devices.
However,
rational
manipulation
phase
composition
2D
suitable
energy
level
alignment
in
2D/3D
photodetectors
(PDs)
has
rarely
explored.
Herein,
we
precisely
controlled
dimensionality
on
CsPbI2Br
films
by
tuning
polarity
n-butylammonium
iodide
(BAI)-based
solvents.
In
comparison
to
pure
n
=
1
(ACN-BAI)
formed
acetonitrile
treatment,
a
mixture
2
phases
(IPA-BAI)
generated
isopropanol
(IPA)
treatment
guaranteed
more
robust
defect
passivation
favorable
at
perovskite/hole
transport
layer
interface.
Consequently,
IPA-BAI
PD
exhibited
responsivity
0.41
A
W–1,
detectivity
1.01
×
1013
Jones,
linear
dynamic
range
120
dB.
Furthermore,
mixed-phase
effectively
shielded
3D
from
moisture.
The
device
retained
76%
its
initial
after
500
h
nonencapsulated
storage
10%
relative
humidity.
This
research
provides
valuable
insights
into
dimensional
modulation
further
enhancing
PDs.
