High
defect
concentrations
at
the
interfaces
are
basis
of
charge
extraction
losses
and
instability
in
perovskite
solar
cells.
Surface
engineering
with
organic
cations
is
a
common
practice
to
solve
this
issue.
However,
full
implications
counteranions
these
for
device
functioning
often
neglected.
In
work,
we
used
4-fluorophenethylammonium
cation
varying
halide
modification
both
methylammonium-free
Pb-based
n-i-p
devices,
observing
significant
differences
among
iodide,
bromide,
chloride.
The
treatment
buried
top
resulted
improved
surface
quality
films
largely
carrier
dynamics
reduced
nonradiative
recombination.
Consequently,
optimal
interface-modified
cells
surpassed
20%
efficiency
demonstrated
remarkable
operational
stability.
Our
findings
underscore
potential
comprehensive
strategies
advancing
film
quality,
thereby
facilitating
their
broader
more
successful
applications.
ChemSusChem,
Journal Year:
2024,
Volume and Issue:
17(21)
Published: May 21, 2024
Abstract
Perovskite
solar
cells
(PSCs)
are
usually
modified
and
passivated
to
improve
their
performance
stability.
The
interface
modification
bulk
doping
the
two
basic
strategies.
Fluorine
(F)‐containing
materials
highly
favored
because
of
unique
hydrophobicity
coordination
ability.
This
review
discusses
characteristics
F,
principles
improving
photovoltaic
stability
PSC
devices
using
F‐containing
materials.
We
systematically
summarized
latest
progress
in
application
achieve
efficient
stable
PSCs
on
several
key
layers.
It
is
believed
that
this
work
will
afford
significant
understanding
inspirations
toward
future
directions
PSCs,
provide
profound
insights
for
development
PSCs.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(36)
Published: June 11, 2024
Abstract
Developing
large‐scale
monolithic
perovskite/silicon
tandem
devices
based
on
industrial
Czochralski
silicon
wafers
will
likely
have
to
adopt
double‐side
textured
architecture,
given
their
optical
benefits
and
low
manufacturing
costs.
However,
the
surface
engineering
strategies
that
are
widely
used
in
solution‐processed
perovskites
regulate
interface
properties
not
directly
applicable
micrometric
textures.
Here,
we
devise
a
passivation
strategy
by
dynamic
spray
coating
(DSC)
fluorinated
thiophenethylammonium
ligands,
combining
advantages
of
providing
conformal
coverage
suppressing
phase
conversion
surfaces.
From
viewpoint
molecular
engineering,
theoretical
calculation
experimental
results
demonstrate
introducing
trifluoromethyl
group
provide
more
effective
through
strong
interaction
energy
alignment
forming
dipole
layer.
Consequently,
DSC
treatment
this
bifunctional
molecule
enables
cells
achieve
certified
stabilized
power
efficiency
30.89
%.
In
addition,
encapsulated
display
excellent
operational
stability
retaining
over
97
%
initial
performance
after
600
h
continuous
illumination.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(35)
Published: June 27, 2024
The
imperfect
charge
behavior
at
the
interfaces
of
perovskite/electron-transport
layer
(ETL)/transparent
conducting
oxide
(TCO)
limits
further
performance
improvement
perovskite/silicon
tandem
solar
cells.
Herein,
an
indium
tin
interlayer
is
deposited
between
ETL
and
TCO
to
address
this
issue.
Specifically,
prepared
using
all-physical
H
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 10, 2024
Abstract
Wide‐bandgap
(WBG)
perovskites
are
continuously
in
the
limelight
owing
to
their
applicability
tandem
solar
cells.
The
main
bottlenecks
of
WBG
interfacial
non‐radiative
recombination
and
carrier
transport
loss
caused
by
defects
large
energy‐level
offsets,
which
induce
additional
energy
losses
when
stacked
with
organic
cells
series
because
unbalanced
interconnecting
layer
(ICL).
To
solve
these
issues,
1,3‐propanediammonium
iodide
(PDADI)
is
incorporated
form
Dion–Jacobson
‐phase
quasi‐2D
mixed
high‐n‐values
perovskites.
PDADI
simultaneously
repairs
shallow/deep
establishes
a
Type‐II
alignment
between
quasi‐2D/3D
3D
for
rapid
extraction.
More
importantly,
short‐chain
diammonium
cation
perovskite
high
n‐values
results
short
Pb–I
inorganic
spacing,
enhances
interlayer
electronic
coupling
weakens
quantum‐well
confinement
effect
that
restricts
transport.
suppressed
increases
electron
concentration
ICL
balanced
recombination.
0.0628
1.004
cm
2
perovskite/organic
tandems
achieve
remarkable
efficiencies
25.92%
24.63%,
respectively.
capping
can
inhibit
ion
migration,
allowing
show
excellent
operational
stability
(
T
85
>
1000
h).
High
defect
concentrations
at
the
interfaces
are
basis
of
charge
extraction
losses
and
instability
in
perovskite
solar
cells.
Surface
engineering
with
organic
cations
is
a
common
practice
to
solve
this
issue.
However,
full
implications
counteranions
these
for
device
functioning
often
neglected.
In
work,
we
used
4-fluorophenethylammonium
cation
varying
halide
modification
both
methylammonium-free
Pb-based
n-i-p
devices,
observing
significant
differences
among
iodide,
bromide,
chloride.
The
treatment
buried
top
resulted
improved
surface
quality
films
largely
carrier
dynamics
reduced
nonradiative
recombination.
Consequently,
optimal
interface-modified
cells
surpassed
20%
efficiency
demonstrated
remarkable
operational
stability.
Our
findings
underscore
potential
comprehensive
strategies
advancing
film
quality,
thereby
facilitating
their
broader
more
successful
applications.
