Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 4, 2025
Abstract
Self‐assembled
monolayers
(SAMs)
have
recently
emerged
as
promising
candidates
for
interfacial
materials
in
organic
photovoltaics
(OPVs).
However,
the
quality
and
integrity
of
SAM
growth
are
significantly
influenced
by
surface
morphology
indium
tin
oxide
(ITO)
substrates,
which
can
compromise
performance
reproducibility
OPVs.
To
achieve
controlled
high‐quality
SAMs
assembly,
this
study
presents
an
effective
strategy
to
eliminate
sensitivity
polycrystalline
ITO
depositing
amorphous
molybdenum
trioxide
(MoO
3
)
thin
layer
on
top.
The
application
MoO
homogenize
roughness
circumvent
issues
related
preferential
grain
orientation
distinct
boundaries
associated
with
ITO.
This
results
a
more
uniform
denser
coverage
compared
direct
bare
Consequently,
resulting
OPVs
based
PM6/BTP‐eC9
system
exhibit
outstanding
power
conversion
efficiency
19.9%
(certified
at
19.3%),
primarily
due
reduced
defects
optimized
active
morphology.
More
importantly,
introduction
between
enhances
long‐term
stability
devices
those
solely
SAMs.
progress
highlights
importance
refining
microstructure
facilitate
favorable
formation
subsequently
construct
high‐performance
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 3, 2025
Abstract
Forming
an
optimal
donor:acceptor
blend
morphology
with
a
low
trap
state
density
is
highly
desired
to
reach
perfect
compromise
between
charge
generation
and
recombination
for
organic
photovoltaics
(OPVs),
wherein
polymer
donor
plays
key
role.
Here,
two
wide
bandgap
donors
of
PN‐HD
PN‐BO
are
reported,
featuring
the
same
low‐cost
chlorinated
dithiazole
as
electron‐withdrawing
unit
but
varied
alkyl
chains
on
π‐bridged
thiophene
ring.
It
found
that
shorter
chain
endows
merits
better
miscibility
acceptor
longer
crystallization
time,
leading
more
favorable
phase
separation
lower
states
(tDOS)
in
resulting
active
layer.
Notably,
tDOS
3.51
×
10
15
cm
−3
eV
−1
PN‐BO:BTP‐eC9‐based
device
has
enabled
exceptionally
high
photocurrent
28.59
mA
−2
,
thereby
efficiency
18.01%,
far
beyond
those
(24.64
15.51%)
PN‐HD:BTP‐eC9‐based
one
higher
value.
The
work
reveals
relationship
flexible
density,
providing
new
route
efficient
OPVs.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 4, 2025
Abstract
Self‐assembled
monolayers
(SAMs)
have
recently
emerged
as
promising
candidates
for
interfacial
materials
in
organic
photovoltaics
(OPVs).
However,
the
quality
and
integrity
of
SAM
growth
are
significantly
influenced
by
surface
morphology
indium
tin
oxide
(ITO)
substrates,
which
can
compromise
performance
reproducibility
OPVs.
To
achieve
controlled
high‐quality
SAMs
assembly,
this
study
presents
an
effective
strategy
to
eliminate
sensitivity
polycrystalline
ITO
depositing
amorphous
molybdenum
trioxide
(MoO
3
)
thin
layer
on
top.
The
application
MoO
homogenize
roughness
circumvent
issues
related
preferential
grain
orientation
distinct
boundaries
associated
with
ITO.
This
results
a
more
uniform
denser
coverage
compared
direct
bare
Consequently,
resulting
OPVs
based
PM6/BTP‐eC9
system
exhibit
outstanding
power
conversion
efficiency
19.9%
(certified
at
19.3%),
primarily
due
reduced
defects
optimized
active
morphology.
More
importantly,
introduction
between
enhances
long‐term
stability
devices
those
solely
SAMs.
progress
highlights
importance
refining
microstructure
facilitate
favorable
formation
subsequently
construct
high‐performance
