Applied Physics Letters,
Год журнала:
2024,
Номер
125(24)
Опубликована: Дек. 9, 2024
The
development
of
inverted
all-inorganic
perovskite
solar
cells
(PSCs)
is
limited
by
the
high
processing
temperature
and
poor
film
coverage
self-assembled
molecule
(SAM)
hole
transport
layer
(HTL).
In
this
work,
hot-air-assisted
annealing
method
was
utilized
to
prepare
CsPbI2Br
films
at
low
in
an
ambient
environment.
SAM
called
2–(3,6-dimethoxycarbazol-9-yl)
ethyl
phosphonic
acid
(MeO-2PACz)
added
into
precursor
spontaneously
form
MeO-2PACz
dipole
light
absorber.
with
abundant
phosphate
groups
modulated
uncoordinated
lead
perovskite's
grain
boundaries
via
forming
–P–O–Pb
–P=O–Pb
bonds,
which
improves
crystallinity
reduces
trap
density
film.
Furthermore,
formed
on
ITO
substrate
during
enhanced
efficiency
reduced
non-radiative
recombination
loss
ITO/CsPbI2Br
interface.
As
a
result,
p-i-n
HTL-free
inorganic
PSCs
additive
achieved
power
conversion
12.92%,
significantly
higher
than
reference
(6.55%).
This
work
provides
easy
efficient
way
environment
additive.
Improving
the
interface
characteristics
between
hole-transport
layer
(HTL)
and
perovskite
absorber
is
crucial
for
achieving
maximum
efficiency
in
inverted
solar
cells
(PSCs).
This
paper
presents
an
effective
functional
compensation
(FCL)
composed
of
benzothiophene
derivatives,
particularly
5-(trifluoromethyl)-1-benzothiophene-2-carboxylic
acid
(TFMBTA);
this
introduced
MeO-2PACz
HTL
to
improve
interfacial
them.
FCL
improves
charge
transfer,
hole
extraction,
deposition
by
improving
surface
morphology
optimizing
energy
level
alignment.
The
groups
TFMBTA
effectively
passivate
defects.
As
a
result,
introduction
markedly
reduces
non-radiative
recombination
at
layer.
MeO-2PACz-based
PSCs
with
demonstrated
impressive
peak
power
conversion
23.85%,
accompanied
substantially
enhanced
open-circuit
voltage
(Voc),
fill
factor
(FF),
long-term
stability.
Similarly,
introducing
PEDOT:PSS
both
stability
PSCs,
demonstrating
universality
FCLs
across
different
types
HTLs.
Abstract
Formamidinium‐cesium
lead
iodide
perovskites
(FA
1‐x
Cs
x
PbI
3
,
0
<
0.1)
are
promising
solar
cell
absorber
materials
with
favorable
bandgap
and
high
thermal
stability.
However,
the
fabrication
of
high‐quality
FA
films
large
grain
size,
stable
black
phase,
uniform
cations
distribution,
minimal
defects
remains
challenging.
Here,
efficacy
cyanovinyl
phosphonic
acid
(CPA)
based
molecular
additives
in
fabricating
0.95
0.05
is
reported.
The
CPA
unit
shows
strong
interactions
all
species
(PbI
2
),
formamidinium
(FAI),
cesium
(CsI)
precursor
solution,
thus
significantly
alleviating
inhomogeneous
crystallization
this
mixed‐cation
system.
resulting
exhibit
enlarged
size
homogenized
cation
presence
CPA‐based
molecules
final
perovskite
enhances
optoelectronic
qualities
photostability
owing
to
efficient
passivation
interaction
perovskite.
With
optimizations
on
adding
concentrations,
inverted
structured
cells
an
optimal
additive
(Ph‐CPA)
achieve
power
conversion
efficiencies
(PCEs)
up
26.25%.
Moreover,
lifespans
(T90,
time
corresponding
90%
initial
PCE
retained)
devices
unprecedentedly
prolonged
from
hundreds
hours
over
1000
3000
h
under
light
stresses
(ISOS‐L‐2I,
85
°C)
operational
condition
(ISOS‐L‐1I),
respectively.
The Journal of Physical Chemistry Letters,
Год журнала:
2024,
Номер
15(30), С. 7635 - 7644
Опубликована: Июль 22, 2024
The
complex
ionic-electronic
conduction
in
mixed
halide
perovskites
enables
their
use
beyond
von
Neumann
architectures
implemented
resistive
switching
memory
devices.
Although
device
fabrication
based
on
perovskite
compounds
involves
solution-processing
at
low
temperatures,
reducing
further
costs
by
eliminating
expensive
materials
can
improve
compatibility
with
upscalable
deposition
techniques.
Notably,
the
substrate
which
active
layer
is
developed
has
been
reported
to
severely
affect
its
quality
and
thus
overall
performance.
Hereby,
we
demonstrate
sustainable
manufacturing
of
memristive
solar
cells
replacing
poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine]
(PTAA)
that
serves
as
a
hole
transporting
(HTL)
self-assembled
monolayer
(SAM),
namely
[2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl]phosphonic
acid
(MeO-2PACz).
Multiple
sequential
current–voltage
characteristics
single
devices
are
reported,
average
data
multiple
reference
targeted
compared.
Resistive
SAM
exhibit
improved
performance
having
reduced
SET
voltage
values
narrower
statistical
variation
compared
PTAA.
It
shown
both
PTAA
high
ON/OFF
ratio
about
103
operating
electric
fields.
Replacing
an
polymer-based
HTL
this
approach
reduces
Perovskite
solar
cells
(PSCs)
with
high
power
conversion
efficiencies
(PCEs)
can
be
produced
using
a
variety
of
methods,
such
as
different
fabrication
device
layout
modification,
and
component
interface
engineering.
Journal of Materials Chemistry C,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
We
synthesized
molecular
hole-transporting
materials
featuring
a
zinc
phthalocyanine
(ZnPc)
central
core
and
modulated
the
non-peripheral
position
with
different
numbers
of
tert
-butyl
groups.
