ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(28), P. 36471 - 36478
Published: July 2, 2024
In
the
development
of
back
electrodes
for
perovskite
solar
cells
(PSCs),
major
challenges
are
stability
and
cost.
To
address
this,
we
present
an
innovative
approach:
Simultaneous
evaporation
two
independently
controlled
sources
metal
materials
was
performed
to
achieve
a
uniform
distribution
alloy
electrodes.
this
study,
Ag–Cu
alloys
(the
molar
ratio
Ag/Cu
is
7/3)
with
high-index
crystal
face
(111)
work
function
matching
were
prepared
using
codeposition
technique.
These
properties
mitigate
nonradiative
carrier
recombination
at
interface
reduce
energy
barrier
migration.
Consequently,
compared
Ag
based
PSCs
(22.77%),
implementation
(Ag/Cu
7/3)-based
resulted
in
power
conversion
efficiency
23.72%.
1500
h
tracking
test
ambient
air,
maintained
their
initial
86%.
This
can
be
attributed
almost
no
migration
elements
from
electrode
layer.
Our
presents
vital
strategy
improving
reducing
costs
associated
PSCs.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 11, 2024
Abstract
Interface
engineering
has
become
the
mainstream
for
improving
performance
of
perovskite
solar
cells
(PSCs).
Interfacial
dipole
(ID)
molecules
have
emerged
as
a
feasible
and
effective
strategy
to
alleviate
charge
carrier
loss
energy
in
PSCs.
Here,
three
symmetrical
donor–acceptor
interfacial
(named
PzT,
PzTE,
PzTN)
are
designed
synthesized
with
identical
hole
transport
backbone
different
anchoring
groups.
The
ID
molecule
is
introduced
into
interface
between
layer
layer.
moments
regulate
surface
work
function
energy‐level
alignment
perovskites,
improve
extraction,
reduce
at
interface.
Meanwhile,
groups
coordinate
defects
on
PVK
HTL,
trap
state
density
accumulation,
mitigate
non‐radiative
recombination
losses.
As
result,
PzTN‐modified
PSC
achieved
champion
power
conversion
efficiency
25.34%
photovoltage
1.176
V
fill
factor
(FF)
83.27%,
accompanied
by
almost
undetectable
hysteresis
excellent
operating
stability.
This
research
demonstrates
efficient
stable
PSCs
molecules.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 19, 2025
Abstract
Nickel
oxide
(NiO
x
)
is
considered
as
a
potential
hole
transport
material
in
the
fabrication
of
lead‐tin
(Pb‐Sn)
perovskite
solar
cells
(PSCs)
for
tandem
applications.
However,
energy
level
mismatch
and
unfavorable
redox
reactions
between
Ni
≥3+
species
Sn
2+
at
NiO
/perovskite
interface
pose
challenges.
Herein,
high‐performance
Pb‐Sn‐based
inorganic
PSCs
are
demonstrated
by
modulating
with
multifunctional
4‐aminobenzenesulfonic
acid
(4‐ABSA)
interlayer.
The
4‐ABSA
interlayer
induces
formation
an
oriented
dipole
moment
directed
from
to
perovskite,
effectively
elevating
valance
band
maximum
film,
thus
balancing
difference
promoting
charge
carrier
extraction
device.
Moreover,
molecules
interact
both
suppressing
reaction
highly
active
perovskites
while
regulating
crystallization.
This
results
films
reduced
defect
density
enlarged
grains.
Consequently,
remarkable
device
efficiency
17.4%
obtained,
representing
highest
reported
value
far.
Furthermore,
enhances
UV‐radiation
operational
stability
resulting
devices,
maintaining
over
80%
90%
initial
after
240
h
UV‐light
exposure
480
1
sun
illumination,
respectively.
Nano-Micro Letters,
Journal Year:
2025,
Volume and Issue:
17(1)
Published: Feb. 27, 2025
Abstract
Hybrid
organic–inorganic
lead
halide
perovskites
have
emerged
as
a
promising
material
for
high-efficiency
solar
cells,
yet
challenges
related
to
crystallization
and
defects
limit
their
performance
stability.
This
study
investigates
the
use
of
perovskite
quantum
dots
(QDs)
seeds
enhance
quality
FAPbI
3
films
improve
cells
(PSCs).
We
demonstrate
that
CsPbI
CsPbBr
QDs
effectively
guide
process,
leading
formation
larger
crystals
with
preferential
orientations,
particularly
(001)
(002)
planes,
which
are
associated
reduced
defect
densities.
seed-mediated
growth
strategy
resulted
in
PSCs
power
conversion
efficiencies
(PCEs)
24.75%
24.11%,
respectively,
compared
baseline
efficiency
22.05%
control
devices.
Furthermore,
devices
incorporating
QD-treated
exhibited
remarkable
stability,
maintaining
over
80%
initial
PCE
after
1000
h
simulated
sunlight
exposure,
significant
improvement
control.
Detailed
optoelectronic
characterization
revealed
non-radiative
recombination
enhanced
charge
transport
These
findings
highlight
potential
powerful
tool
crystallization,
facet
orientation,
overall
device
performance,
offering
route
both
stability
PSCs.
Perovskite
solar
cells
(PSCs)
have
made
significant
progress
in
efficiency,
but
their
long-term
operational
stability
remains
an
important
yet
challenging
issue.
Here,
a
dual-site
passivation
coupling
internal
encapsulation
strategy
is
developed
by
introducing
3,5-bis(trifluoromethyl)-benzenethiol
(35BBT)
at
the
perovskite
(PVK)/hole
transport
layer
(HTL)
interface.
35BBT
provides
dual
active
sites
containing
sulfur
(S)
atoms
and
fluorine
(F)
atoms,
where
S
sulfhydryl
group
F
trifluoromethyl
coordinate
with
unpaired
Pb2+
to
form
bonds,
meanwhile
hydrogen
bonds
organic
cations.
This
mitigates
deep
shallow
defects
PVK/HTL
Notably,
35BBT,
hydrophobic
benzene
rings
covering
layer,
enables
protect
films
from
water
oxygen
invasion.
Consequently,
Ag-based
device
treatment
achieves
efficiency
enhancement
22.03%
23.86%,
retaining
89.1%
of
its
initial
even
after
2000
h
air
exposure.
fabricated
also
exhibits
thermal
60
°C.
study
offers
avenue
for
simultaneously
passivating
interface
inhibiting
water/oxygen
erosion,
thereby
enabling
fabrication
efficient
stable
PSCs
future
commercial
applications.
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 17, 2024
Abstract
A
stable
and
compact
fullerene
electron
transport
layer
(ETL)
is
crucial
for
high‐performance
inverted
perovskite
solar
cells
(PSCs).
However,
traditional
fullerene‐based
ETLs
like
C
60
PCBM
are
prone
to
aggregate
under
operational
conditions,
a
challenge
recently
recognized
by
academic
industrial
researchers.
Here,
we
designed
synthesized
novel
cross‐linkable
molecule,
bis((3‐methyloxetan‐3‐yl)methyl)
malonate‐C
monoadduct
(BCM),
use
as
an
ETL
in
PSCs.
Upon
low‐temperature
annealing
at
100
°C,
BCM
undergoes
situ
cross‐linking
form
robust
cross‐linked
(CBCM)
film,
which
demonstrates
excellent
mobility
suitable
band
structure
efficient
Our
results
show
that
PSCs
incorporating
CBCM‐based
achieve
impressive
efficiency
of
25.89
%
(certified:
25.36
%),
significantly
surpassing
the
23.25
PCBM‐based
devices.
The
intramolecular
covalent
interactions
within
CBCM
films
effectively
prevent
aggregation
enhance
film
compactness,
creating
internal
encapsulation
mitigates
decomposition
ion
migration
components.
Consequently,
exceptional
stability,
maintaining
97.8
their
initial
after
1000
hours
maximum
power
point
tracking,
compared
only
78.6
retention
devices
less
than
820
hours.
