Angewandte Chemie,
Год журнала:
2024,
Номер
136(50)
Опубликована: Авг. 20, 2024
Abstract
As
the
simplest
oligomeric
acceptors,
dimerized
acceptors
(DAs)
are
easier
to
synthesize,
and
more
importantly,
they
can
retain
good
intermolecular
interaction
photovoltaic
properties
of
their
parent
small‐molecule
(SMAs).
Nevertheless,
currently
most
efficient
DAs
derived
from
banana‐shaped
might
suffer
inferior
device
stability
with
high
diffusion
coefficients.
Herein,
we
design
synthesize
two
planar
(DMT‐FH
DMT‐HF)
by
bridging
linear‐shaped
M‐series
SMAs
a
thiophene
unit.
The
effects
fluorination
position
on
coefficients,
power
conversion
efficiencies
(PCEs)
systematically
studied.
Our
results
suggest
that
DMT‐HF
ending
indanone
groups
shows
enhanced
interactions,
improved
PCE
compared
counterpart
(DMT‐FH)
central
groups.
Further
optimization
DMT‐HF‐based
devices
yields
an
outstanding
17.17
%,
which
is
highest
among
all
SMA‐based
DAs.
Notably,
low
coefficient
(3.36×10
−24
cm
2
s
−1
)
DMT‐HF,
resulting
retains
over
93
%
initial
after
5000
h
continuous
heating
at
85
°C,
suggesting
its
excellent
thermal
stability.
highlight
importance
for
achieving
stable
polymer
solar
cells.
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Фев. 20, 2025
Abstract
Limited
by
large
batch
differences
and
inferior
polymerization
degree
of
current
polymer
acceptors,
the
potential
high
efficiency
stability
advantages
all-polymer
solar
cells
(all-PSCs)
cannot
be
fully
utilized.
Alternatively,
largely
π-extended
structurally
definite
oligomer
acceptors
are
effective
strategies
to
realize
overall
performance
acceptors.
Herein,
we
report
a
linear
tetramer
acceptor
namely
4Y-BO
with
identical
molecular
skeleton
comparable
molecular-weight
relative
control
PY-BO.
The
shows
refined
film-forming
kinetics
improved
ordering,
offering
uniform
crystallinity
donor
hence
well-defined
fibrous
heterojunction
textures.
Encouragingly,
PM6:4Y-BO
devices
achieve
an
up
19.75%
(certified
efficiency:19.58%),
surpassing
that
PM6:PY-BO
device
(15.66%)
ranks
highest
among
based
on
More
noticeably,
thermal
stability,
photostability
mechanical
flexibility
collectively
enhanced
for
devices.
Our
study
provides
important
approach
fabricating
stable
organic
photovoltaics.
Macromolecular Rapid Communications,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 3, 2024
Abstract
The
dimerization
of
small
molecule
acceptors
(SMAs)
holds
significant
potential
by
combining
the
advantages
both
SMAs
and
polymer
in
realizing
high
power
conversion
efficiency
(PCE)
operational
stability
organic
solar
cells
(OSCs).
However,
advancements
selection
innovation
dimeric
linkers
are
still
challenging
enhancing
their
performance.
In
this
study,
three
new
acceptors,
namely
DY‐Ar‐4,
DY‐Ar‐5,
DY‐Ar‐6
synthesized,
linking
two
Y‐series
SMA
subunits
via
an
“end‐to‐end”
strategy
using
flexible
spacers
(octyl,
decyl,
dodecyl,
respectively).
influence
spacer
lengths
on
device
performance
is
systematically
investigated.
results
indicate
that
DY‐Ar‐5
exhibits
more
compact
ordered
packing,
leading
to
optimal
morphology.
OSCs
based
PM6:
achieves
a
maximum
PCE
15.76%,
attributes
enhance
balance
carrier
mobility,
reduce
recombination.
This
suitable
non‐conjugated
units
provides
rational
principle
for
designing
high‐performance
non‐fullerene
acceptors.
Journal of Materials Chemistry C,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Polyethylenimine
(PEI)
modified
with
tin(
ii
)
ions
serves
as
an
effective
electron
transport
layer
in
inverted
polymer
solar
cells,
achieving
a
power
conversion
efficiency
(PCE)
of
17.5%,
which
exceeds
the
15.7%
PCE
traditional
PEI-based
devices.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 12, 2025
Abstract
Organic
solar
cells
(OSCs)
typically
exhibit
large
energy
disorders
due
to
the
complicated
blend
morphology,
which
is
one
of
important
factors
in
limiting
improvement
power
conversion
efficiencies
(PCEs).
Herein,
two
new
cross‐shaped
donor
molecules,
BTCl‐4R
and
BT‐4R,
featured
with
central
benzodithiophene
(BDT)
cores
flanked
four
π‐bridges
hexylrhodanine
end
groups
are
developed,
introduced
into
OSCs
as
a
third
component
optimize
packing
behaviors
reduce
disorder.
By
blending
classical
PM6:L8‐BO
system,
outstanding
PCE
20.03%
low
disorder
32
meV
achieved,
higher
order
lowers
trap
density
inter‐connected
morphology
facilitates
establishment
more
charge
transport
channels.
This
study
demonstrates
significant
potential
multi‐arm
molecules
constructing
high‐performance
OSCs.
Journal of Materials Chemistry A,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Dual-asymmetric
polymer
acceptors
with
finely-tailored
molecular
energy
levels,
crystallinity,
and
packing
are
developed
for
the
first
time,
achieving
an
efficiency
of
17.28%
in
all-polymer
solar
cells.
Polymer Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
An
ester-modified
polymer
acceptor
enhance
thickness
tolerance
in
all-polymer
solar
cells,
achieving
14%
efficiency
at
350
nm
and
maintaining
80%
(400
nm),
the
highest
reported
for
thick
all-PSCs,
enabling
scalable
roll-to-roll
production.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(50)
Опубликована: Авг. 20, 2024
Abstract
As
the
simplest
oligomeric
acceptors,
dimerized
acceptors
(DAs)
are
easier
to
synthesize,
and
more
importantly,
they
can
retain
good
intermolecular
interaction
photovoltaic
properties
of
their
parent
small‐molecule
(SMAs).
Nevertheless,
currently
most
efficient
DAs
derived
from
banana‐shaped
might
suffer
inferior
device
stability
with
high
diffusion
coefficients.
Herein,
we
design
synthesize
two
planar
(DMT‐FH
DMT‐HF)
by
bridging
linear‐shaped
M‐series
SMAs
a
thiophene
unit.
The
effects
fluorination
position
on
coefficients,
power
conversion
efficiencies
(PCEs)
systematically
studied.
Our
results
suggest
that
DMT‐HF
ending
indanone
groups
shows
enhanced
interactions,
improved
PCE
compared
counterpart
(DMT‐FH)
central
groups.
Further
optimization
DMT‐HF‐based
devices
yields
an
outstanding
17.17
%,
which
is
highest
among
all
SMA‐based
DAs.
Notably,
low
coefficient
(3.36×10
−24
cm
2
s
−1
)
DMT‐HF,
resulting
retains
over
93
%
initial
after
5000
h
continuous
heating
at
85
°C,
suggesting
its
excellent
thermal
stability.
highlight
importance
for
achieving
stable
polymer
solar
cells.
