Advanced Functional Materials,
Journal Year:
2021,
Volume and Issue:
32(5)
Published: Oct. 20, 2021
Abstract
The
charge
transport
ability
of
polymer
acceptors
(
P
A
s)
is
crucial
for
achieving
high
power
conversion
efficiencies
(PCEs)
all‐polymer
solar
cells
(all‐PSCs).
However,
the
electron
mobilities
(μ
e
most
s
are
inferior
to
those
their
small
molecule
acceptor
(SMA)
counterparts.
Herein,
authors
design
a
new
series
polymerized
SMA‐based
(Y5‐A‐B),
where
donating
moiety
(A
=
selenophene
(Se)/biselenophene
(BiSe))
and
backbone
regioregularity
(B
In/Mix/Out)
2D
controlled,
enhancing
both
μ
PCEs.
Interestingly,
effects
regioisomers
on
all‐PSC
performance
opposite
depending
unit.
For
Y5‐Se‐based
s,
PCEs
increase
in
order
Out
(7.52%)
<
Mix
(9.33%)
In
(13.38%).
contrast,
Y5‐BiSe‐based
decrease
(10.67%)
>
(9.58%)
(8.52%).
These
trends
each
originate
from
different
planarity
intermolecular
assembly
regioregularity.
Thus,
Y5‐Se‐In
blend
exhibits
highest
achieves
PCE
(13.38%)
among
all‐PSCs
this
study.
Therefore,
report
importance
simultaneous
engineering
building
unit
realize
high‐mobility
highly
efficient
all‐PSCs.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(33)
Published: April 26, 2024
Abstract
All‐polymer
solar
cells
(all‐PSCs)
offer
promising
potential
for
large‐scale
manufacturing
due
to
their
remarkable
mechanical
and
thermal
stability.
However,
the
limited
capacity
of
polymer
acceptors
near‐infrared
(NIR)
photon
harvesting
has
impeded
progress
in
semi‐transparent
(ST)
all‐PSCs.
Here,
study
develops
a
pair
new
NIR
acceptors,
named
PYSeF‐T
PYSe2F‐T,
with
mono‐/di‐fluorinated
end
groups
capped
selenide
monomer
backbone,
respectively.
Owing
stronger
intermolecular
interaction
intramolecular
charge
transfer
effect
di‐fluorinated
PYSe2F‐T
exhibits
crystallinity
more
bathochromic
absorption
1000
nm.
When
blended
donor,
PM6,
PY2SeF‐T‐based
all‐PSC
demonstrates
higher
efficiency
16.73%
short‐circuit
current
(
J
SC
)
27.7
mA
cm
−2
,
which
is
highest
Based
on
these,
ST
device
based
PM6:PYSe2F‐T
superior
12.52%
an
average
visible
transmittance
26.2%
light
utilization
3.28%,
outperforming
mono‐fluorinated
counterpart.
The
work
provides
in‐depth
understanding
above
synergistic
effects
develop
establishes
solid
foundation
future
investigations
into
large‐area
flexible
SusMat,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 17, 2025
ABSTRACT
All‐polymer
solar
cells
(all‐PSCs)
are
of
interest
owing
to
their
unique
advantages,
including
remarkably
improved
device
stability
and
exceptional
mechanical
stretchability.
Over
recent
years,
there
has
been
a
notable
increase
in
the
power
conversion
efficiency
(PCE)
all‐PSCs,
largely
attributed
advancements
morphology
control
active
layer.
Notably,
domain
size
is
paramount
importance
as
it
impacts
critical
factors
such
exciton
dissociation,
charge
transport,
collection.
However,
low
glass
transition
temperature
conjugated
polymers,
coupled
with
minimal
change
mixing
entropy,
often
results
an
excessive
degree
phase
separation.
Consequently,
essential
comprehend
evolution
separation
develop
strategies
regulate
size.
In
this
review,
we
elucidate
key
parameters
that
contribute
enhancement
present
qualitative
quantitative
characterization
techniques
for
Building
on
foundation,
introduce
principles
regulating
sizes,
encompassing
crystallinity,
miscibility,
molecular
conformation
from
thermodynamic
perspective,
well
film‐forming
kinetics
crystallization
sequence
kinetic
perspective.
Lastly,
offer
insights
into
current
challenges
potential
future
prospects
all‐PSCs.
Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 20, 2025
Abstract
Giant
dimeric
acceptors
(GDAs),
a
sub‐type
of
acceptor
materials
for
organic
solar
cells
(OSCs),
have
garnered
much
attention
due
to
the
synergistic
advantages
their
monomeric
and
polymeric
acceptors,
forming
well‐defined
molecular
structure
with
giant
weight
high
efficiency
stability.
In
this
study,
first
time,
two
new
GDAs,
DYF‐V
DY2F‐V
are
designed
synthesized
OSC
operation,
by
connecting
one
vinylene
linker
mono‐/di‐fluorinated
end
group
on
Y‐series
monomers,
respectively.
After
fluorination,
both
exhibit
bathochromic
absorption
denser
packing
modes
stronger
intramolecular
charge
transfer
effect
torsion‐free
backbones.
Through
precise
DYF‐V‐based
devices
highest
performance
18.63%
among
GDA‐based
OSCs,
outperforming
its
non‐fluorinated
counterpart,
DY‐V‐based
ones
(16.53%).
Theoretical
morphological
results
demonstrate
that
proper
fluorination
in
strengthens
intra/intermolecular
interactions
enhanced
crystallinity,
superior
phase
segregation,
less
energy
disorder,
which
is
beneficial
fast
exciton
dissociation,
rapid
carrier
transport,
suppressed
recombination.
The
work
demonstrates
GDAs
rigid
coplanar
backbones
effective
broader
photon
harvesting,
packing,
robust
stability
OSCs.
Advanced Science,
Journal Year:
2022,
Volume and Issue:
9(23)
Published: June 24, 2022
Despite
remarkable
breakthrough
made
by
virtue
of
"polymerized
small-molecule
acceptor
(PSMA)"
strategy
recently,
the
limited
selection
pool
high-performance
polymer
acceptors
and
long-standing
challenge
in
morphology
control
impede
their
further
developments.
Herein,
three
PSMAs
PYDT-2F,
PYDT-3F,
PYDT-4F
are
developed
introducing
different
fluorine
atoms
on
end
groups
and/or
bithiophene
spacers
to
fine-tune
optoelectronic
properties
for
PSMAs.
The
exhibit
narrow
bandgap
energy
levels
that
match
well
with
PM6
donor.
fluorination
promotes
crystallization
chain
enhanced
electron
mobility,
which
is
improved
following
n-doping
benzyl
viologen
additive.
Moreover,
miscibility
also
more
atoms,
intermixing
Among
them,
PYDT-3F
exhibits
well-balanced
high
crystallinity
donor;
thus,
layer-by-layer
processed
PM6/PYDT-3F
film
obtains
an
optimal
nanofibril
submicron
length
≈23
nm
width
fibrils,
facilitating
charge
separation
transport.
resulting
devices
realizes
a
record
power
conversion
efficiency
(PCE)
17.41%
fill
factor
77.01%,
higher
than
PM6/PYDT-2F
(PCE
=
16.25%)
PM6/PYDT-4F
16.77%)
devices.
Advanced Functional Materials,
Journal Year:
2021,
Volume and Issue:
32(5)
Published: Oct. 20, 2021
Abstract
The
charge
transport
ability
of
polymer
acceptors
(
P
A
s)
is
crucial
for
achieving
high
power
conversion
efficiencies
(PCEs)
all‐polymer
solar
cells
(all‐PSCs).
However,
the
electron
mobilities
(μ
e
most
s
are
inferior
to
those
their
small
molecule
acceptor
(SMA)
counterparts.
Herein,
authors
design
a
new
series
polymerized
SMA‐based
(Y5‐A‐B),
where
donating
moiety
(A
=
selenophene
(Se)/biselenophene
(BiSe))
and
backbone
regioregularity
(B
In/Mix/Out)
2D
controlled,
enhancing
both
μ
PCEs.
Interestingly,
effects
regioisomers
on
all‐PSC
performance
opposite
depending
unit.
For
Y5‐Se‐based
s,
PCEs
increase
in
order
Out
(7.52%)
<
Mix
(9.33%)
In
(13.38%).
contrast,
Y5‐BiSe‐based
decrease
(10.67%)
>
(9.58%)
(8.52%).
These
trends
each
originate
from
different
planarity
intermolecular
assembly
regioregularity.
Thus,
Y5‐Se‐In
blend
exhibits
highest
achieves
PCE
(13.38%)
among
all‐PSCs
this
study.
Therefore,
report
importance
simultaneous
engineering
building
unit
realize
high‐mobility
highly
efficient
all‐PSCs.
