SnO2
electron
transport
layer
(ETL)
morphology
plays
a
vital
role
in
carrier
transportation
and
the
properties
of
perovskite
solar
cells
(PSCs).
However,
uneven
pore
surface
would
inevitably
lead
to
high
interface
defects,
hysteresis,
poor
performance.
In
this
work,
we
use
molecular
modifier
4-guanidinobenzoic
acid
methanesulfonate
(GAMSA)
build
bridge
on
buried
SnO2/perovskite.
XPS
results
demonstrate
that
ratio
lattice
oxygen
(OL)/adsorbed
(OV)
increased
from
1.35
2.34
after
GAMSA
modification,
thus,
Sn4+
O
vacancy
defects
were
effectively
reduced.
Meanwhile,
conduction
band
minimum
ETL
enhanced
−4.33
eV
−4.07
eV,
which
obviously
facilitated
transport.
As
result,
optimal
device
exhibits
an
efficiency
22.42%,
is
much
higher
than
control
one
20.13%,
with
greatly
decreased
hysteresis
index
14.35%
3.27%.
Notably,
optimized
target
demonstrated
excellent
long-term
stability,
maintaining
initial
87%
2000
h
storage
N2
atmosphere
dark
at
room
temperature.
This
work
paves
new
method
modification
improve
restrain
for
performance
PSCs.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 30, 2024
Abstract
Self‐assembled
monolayers
(SAM)
as
hole
transport
layers
have
been
widely
used
in
high‐efficiency
inverted
perovskite
solar
cells
(PSCs)
exceeded
26
%.
However,
the
poor
coverage
and
non‐uniform
distribution
on
substrate
of
SAM
further
restrict
improvement
device
performance.
Herein,
we
utilize
mixed
strategy
via
MeO‐2PACz
along
with
perfluorotripropylamine
(FC‐3283)
to
improve
coverage,
aiming
accelerate
carrier
transport,
promote
growth,
regulate
surface
energy
levels
suppress
nonradiative
recombination.
The
champion
mixed‐SAM
achieves
an
efficiency
25.70
%
(certified
25.6
%)
long‐term
stability
(maintained
initial
90
after
1000
h
180
under
ISOS‐L‐1
ISOS‐L‐2).
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 13, 2024
Abstract
Inverted
perovskite
solar
cells
(PSCs)
hold
exceptional
promise
as
next‐generation
photovoltaic
technology,
where
both
absorbers
and
charge‐transporting
materials
(CTMs)
play
critical
roles
in
cell
performance.
In
recent
years,
polymeric
CTMs
have
played
an
important
role
developing
efficient,
stable,
large‐area
inverted
PSCs
due
to
their
unique
properties
of
high
conductivity,
tunable
structures,
mechanical
flexibility.
This
review
provides
a
comprehensive
overview
used
PSCs,
encompassing
hole
transport
(HTMs)
electron
(ETMs).
the
relationship
between
molecular
modification
strategies
are
systematically
summarized
analyzed
for
adjusting
energy
levels,
improving
charge
extraction,
enabling
deep
understanding
these
widely
materials.
The
also
explores
effective
designing
even
more
efficient
CTMs.
Finally,
outlook
is
proposed
on
exciting
research
novel
CTMs,
paving
way
commercialized
applications
PSCs.
SnO2
electron
transport
layer
(ETL)
morphology
plays
a
vital
role
in
carrier
transportation
and
the
properties
of
perovskite
solar
cells
(PSCs).
However,
uneven
pore
surface
would
inevitably
lead
to
high
interface
defects,
hysteresis,
poor
performance.
In
this
work,
we
use
molecular
modifier
4-guanidinobenzoic
acid
methanesulfonate
(GAMSA)
build
bridge
on
buried
SnO2/perovskite.
XPS
results
demonstrate
that
ratio
lattice
oxygen
(OL)/adsorbed
(OV)
increased
from
1.35
2.34
after
GAMSA
modification,
thus,
Sn4+
O
vacancy
defects
were
effectively
reduced.
Meanwhile,
conduction
band
minimum
ETL
enhanced
−4.33
eV
−4.07
eV,
which
obviously
facilitated
transport.
As
result,
optimal
device
exhibits
an
efficiency
22.42%,
is
much
higher
than
control
one
20.13%,
with
greatly
decreased
hysteresis
index
14.35%
3.27%.
Notably,
optimized
target
demonstrated
excellent
long-term
stability,
maintaining
initial
87%
2000
h
storage
N2
atmosphere
dark
at
room
temperature.
This
work
paves
new
method
modification
improve
restrain
for
performance
PSCs.
