Angewandte Chemie International Edition,
Год журнала:
2022,
Номер
61(25)
Опубликована: Апрель 5, 2022
Enhancing
the
built-in
electric
field
to
promote
charge
dynamitic
process
is
of
great
significance
boost
performance
non-fullerene
organic
solar
cells
(OSCs),
which
has
rarely
been
concerned.
In
this
work,
we
introduced
a
cheap
ferroelectric
polymer
as
an
additive
into
active
layers
OSCs
improve
device
performance.
An
additional
and
permanent
electrical
was
produced
by
polarization
dipoles,
can
substantially
enhance
field.
The
promoted
exciton
separation,
significantly
accelerated
transport,
reduced
recombination,
well
optimized
film
morphology
were
observed
in
device,
leading
improved
PVDF-modified
with
various
layers,
such
PM6
:
Y6,
BTP-eC9,
IT-4F
PTB7-Th
Y6.
Especially,
record
efficiency
17.72
%
for
Y6-based
OSC
outstanding
18.17
BTP-eC9-based
achieved.
Advanced Materials,
Год журнала:
2022,
Номер
34(27)
Опубликована: Март 22, 2022
State-of-art
Y-series
polymer
acceptors
are
typically
based
on
a
mono-thiophene
linker,
which
can
cause
some
twisted
molecular
conformations
and
thus
limit
the
performance
of
all-polymer
solar
cells
(all-PSCs).
Here,
high-performance
acceptor
vinylene
linkers
is
reported,
leads
to
surprising
changes
in
polymers'
conformations,
optoelectronic
properties,
enhanced
photovoltaic
performance.
It
found
that
thiophene
or
bithiophene
(PY-T-γ
PY-2T-γ)
display
significant
twisting
between
end-groups
linker
units,
while
vinylene-based
(PY-V-γ)
exhibits
more
coplanar
rigid
conformation.
As
result,
PY-V-γ
demonstrates
better
conjugation
tighter
interchain
stacking,
results
higher
mobility
reduced
energetic
disorder.
Furthermore,
detailed
morphology
investigations
reveal
PY-V-γ-based
blend
high
domain
purity
fill
factor
its
all-PSCs.
With
these,
efficiency
17.1%
achieved
all-PSCs,
highest
reported
for
binary
all-PSCs
date.
This
work
vinylene-linker
superior
unit
build
with
chain
conformation,
beneficial
aggregation
efficient
Although
the
rapid
development
of
polymer
solar
cells
(PSCs)
has
been
achieved,
it
is
still
a
great
challenge
to
explore
efficient
ways
for
improving
power
conversion
efficiency
(PCE)
PSCs
from
materials
and
device
engineering.
Ternary
strategy
confirmed
as
an
way
improve
PCE
by
employing
three
kinds
materials.
In
this
work,
one
donor
PM6,
two
non-fullerene
N3
MF1
are
selected
prepare
ternary
with
layer-by-layer
(LbL)
or
bulk-heterojunction
(BHJ)
structure.
The
LbL
BHJ-PSCs
exhibit
PCEs
16.75%
16.76%
15
wt%
content
in
acceptors,
corresponding
over
5%
4%
improvement
compared
N3-based
binary
BHJ
mainly
attributed
fill
factor
enhancement
73.29%
76.95%
LbL-PSCs
74.13%
77.51%
strategy.
This
work
indicates
that
potential
preparing
highly
via
simultaneously
optimizing
molecular
arrangement
thickness
each
layer.
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(8)
Опубликована: Янв. 6, 2023
Abstract
Here,
a
near‐infrared
(NIR)‐absorbing
small‐molecule
acceptor
(SMA)
Y‐SeNF
with
strong
intermolecular
interaction
and
crystallinity
is
developed
by
combining
selenophene‐fused
core
naphthalene‐containing
end‐group,
then
as
custom‐tailor
guest
incorporated
into
the
binary
PM6:L8‐BO
host
system.
shows
65
nm
red‐shifted
absorption
compared
to
L8‐BO.
Thanks
of
Y‐SeNF,
morphology
PM6:L8‐BO:Y‐SeNF
can
be
precisely
regulated
introducing
achieving
improved
charge‐transporting
suppressed
non‐radiative
energy
loss.
Consequently,
ternary
polymer
solar
cells
(PSCs)
offer
an
impressive
device
efficiency
19.28%
both
high
photovoltage
(0.873
V)
photocurrent
(27.88
mA
cm
−2
),
which
one
highest
efficiencies
in
reported
single‐junction
PSCs.
Notably,
PSC
has
excellent
stability
under
maximum‐power‐point
tracking
for
even
over
200
h,
better
than
its
parental
devices.
The
study
provides
novel
strategy
construct
NIR‐absorbing
SMA
efficient
stable
PSCs
toward
practical
applications.
Energy & Environmental Science,
Год журнала:
2023,
Номер
16(5), С. 2316 - 2326
Опубликована: Янв. 1, 2023
Here
the
aggregation
behavior
differences
induced
by
solvent–material
and
material–material
interactions
are
clearly
revealed
combined
ex
situ
in
morphology
characterization
studies
on
representative
high-efficiency
OPV
systems.
Nature Communications,
Год журнала:
2022,
Номер
13(1)
Опубликована: Сен. 7, 2022
The
polymerized
small-molecule
acceptors
have
attracted
great
attention
for
application
as
polymer
acceptor
in
all-polymer
solar
cells
recently.
modification
of
small
molecule
building
block
and
the
π-bridge
linker
is
an
effective
strategy
to
improve
photovoltaic
performance
acceptors.
In
this
work,
we
synthesized
a
new
PG-IT2F
which
representative
PY-IT
by
replacing
its
upper
linear
alkyl
side
chains
on
with
branched
attaching
difluorene
substituents
thiophene
linker.
Through
synergistic
optimization,
possesses
more
suitable
phase
separation,
increased
charge
transportation,
better
exciton
dissociation,
lower
bimolecular
recombination,
longer
transfer
state
lifetime
than
their
PM6
donor.
Therefore,
devices
based
PM6:PG-IT2F
demonstrated
high
power
conversion
efficiency
17.24%,
one
highest
reported
binary
all
date.
This
work
indicates
that
regulation
plays
key
role
designing
developing
highly
efficient
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(26)
Опубликована: Апрель 26, 2023
High
efficiency
organic
solar
cells
(OSCs)
based
on
A-DA'D-A
type
small
molecule
acceptors
(SMAs)
were
mostly
fabricated
by
toxic
halogenated
solvent
processing,
and
power
conversion
(PCE)
of
the
non-halogenated
processed
OSCs
is
mainly
restricted
excessive
aggregation
SMAs.
To
address
this
issue,
we
developed
two
vinyl
π-spacer
linking-site
isomerized
giant
(GMAs)
with
linking
inner
carbon
(EV-i)
or
out
(EV-o)
benzene
end
group
SMA
longer
alkyl
side
chains
(ECOD)
for
capability
solvent-processing.
Interestingly,
EV-i
possesses
a
twisted
molecular
structure
but
enhanced
conjugation,
while
EV-o
shows
better
planar
weakened
conjugation.
The
OSC
as
acceptor
o-xylene
(o-XY)
demonstrated
higher
PCE
18.27
%
than
that
devices
ECOD
(16.40
%)
(2.50
%).
one
highest
PCEs
among
from
solvents
so
far,
benefitted
suitable
structure,
stronger
absorbance
high
charge
carrier
mobility
EV-i.
results
indicate
GMAs
site
would
be
excellent
candidates
fabricating
performance
solvents.
Polymer Chemistry,
Год журнала:
2022,
Номер
13(42), С. 5993 - 6001
Опубликована: Янв. 1, 2022
Multi-dimensional
modelling
was
used
to
study
the
effect
of
chalcogen
atoms
on
non-covalent
interactions,
structural
and
electronic
properties
polymer
materials.
Their
bulk
were
also
studied
at
molecular
level.
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(14)
Опубликована: Янв. 22, 2023
Abstract
With
the
emergence
of
ADA'DA‐type
(Y‐series)
non‐fullerene
acceptors
(NFAs),
power
conversion
efficiencies
(PCEs)
organic
photovoltaic
devices
have
been
constantly
refreshed
and
gradually
reached
20%
in
recent
years
(19%
for
single
junction
tandem
device).
The
possess
specific
design
concept,
which
greatly
enrich
NFA
types
excellent
compatibility
with
many
donor
materials.
It
is
gratifying
to
note
that
previously
underperforming
materials
combine
these
regulated
shine
again.
Nowadays,
concept
modular
widely
used
research
donors,
injecting
new
vitality
into
field
photovoltaics.
Furthermore,
also
promote
multicomponent
devices,
bilayer
processing
solvent
engineering,
additive
engineering.
Herein,
latest
progresses
polymer
solar
cells
efficiency
over
17%
are
briefly
reviewed
from
aspects
active
material
design,
interface
development,
device
technology.
At
last,
opportunities
challenges
commercialization
future
discussed.