Advanced Functional Materials,
Год журнала:
2024,
Номер
34(41)
Опубликована: Июль 3, 2024
Abstract
The
dimerization
of
small
molecule
acceptors
(SMAs)
is
a
promising
strategy
for
enhancing
the
long‐term
stability
and
power
conversion
efficiency
(PCE)
organic
solar
cells
(OSCs).
However,
reported
DSMAs
are
primarily
limited
to
end‐linked
molecular
configurations,
highlighting
need
further
exploration
various
dimer
architectures.
Herein,
development
two
distinct
core‐linked
dimerized
SMAs
(DYF‐V
DYF‐E)
with
tailored
linker
structures
(vinylene
ethynyl,
respectively),
achieving
high‐performance
OSCs
(PCE
=
18.53%).
Interestingly,
subtle
change
in
results
markedly
different
properties
photovoltaic
performances
acceptors.
DYF‐E
an
ethynyl
exhibits
more
twisted
backbone
conformation
mitigated
aggregation
property
compared
DYF‐V,
inducing
desirable
blend
morphologies
polymer
donor
including
high
crystallinity,
face‐on
oriented
packing
structures,
well‐intermixed
domains.
Thus,
DYF‐E‐based
exhibit
PCE
(17.02%),
which
significantly
outperforms
DYF‐V‐based
9.98%).
Furthermore,
ternary
based
on
achieve
higher
18.53%.
this
study
highlights
significance
selecting
appropriate
producing
OSCs.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
63(1)
Опубликована: Ноя. 21, 2023
A
pyrene-fused
dimerized
electron
acceptor
has
been
successfully
synthesized
and
subsequently
incorporated
as
the
third
component
in
ternary
organic
solar
cells
(OSCs).
Diverging
from
traditional
acceptors
with
a
linear
configuration,
this
novel
displays
distinctive
"butterfly-like"
structure,
comprising
two
Y-acceptors
wings
fused
pyrene-based
backbone.
The
extended
π-conjugated
backbone
electron-donating
nature
of
pyrene
enable
new
to
show
low
solubility,
elevated
glass
transition
temperature
(Tg
),
low-lying
frontier
energy
levels.
Consequently,
seamlessly
integrates
into
OSCs,
enhancing
transporting
properties,
reducing
non-radiative
voltage
loss,
elevating
open-circuit
voltage.
These
merits
have
enabled
OSCs
an
exceptional
efficiency
19.07%,
marked
improvement
compared
17.6%
attained
binary
OSCs.
More
importantly,
high
Tg
exhibited
by
helps
stabilize
morphology
photoactive
layer
thermal-treated
at
70
°C,
retaining
88.7%
over
600
hours.
For
comparison,
experience
decline
73.7%
after
same
duration.
results
indicate
that
design
incorporation
unit
is
promising
strategy
development
for
Nano-Micro Letters,
Год журнала:
2023,
Номер
16(1)
Опубликована: Ноя. 23, 2023
Abstract
With
plenty
of
popular
and
effective
ternary
organic
solar
cells
(OSCs)
construction
strategies
proposed
applied,
its
power
conversion
efficiencies
(PCEs)
have
come
to
a
new
level
over
19%
in
single-junction
devices.
However,
previous
studies
are
heavily
based
chloroform
(CF)
leaving
behind
substantial
knowledge
deficiencies
understanding
the
influence
solvent
choice
when
introducing
third
component.
Herein,
we
present
case
where
newly
designed
asymmetric
small
molecular
acceptor
using
fluoro-methoxylated
end-group
modification
strategy,
named
BTP-BO-3FO
with
enlarged
bandgap,
brings
different
morphological
evolution
performance
improvement
effect
on
host
system
PM6:BTP-eC9,
processed
by
CF
ortho-xylene
(
o
-XY).
detailed
analyses
supported
series
experiments,
best
PCE
19.24%
for
green
solvent-processed
OSCs
is
found
be
fruit
finely
tuned
crystalline
ordering
general
aggregation
motif,
which
furthermore
nourishes
favorable
charge
generation
recombination
behavior.
Likewise,
can
achieved
replacing
spin-coating
blade
coating
active
layer
deposition.
This
work
focuses
commonly
met
yet
frequently
ignored
issues
building
blends
demonstrate
cutting-edge
device
performance,
hence,
will
instructive
other
OSC
works
future.
Advanced Energy Materials,
Год журнала:
2024,
Номер
14(8)
Опубликована: Янв. 2, 2024
Abstract
High
power
conversion
efficiency
(PCE),
long‐term
stability,
and
mechanical
robustness
are
prerequisites
for
the
commercial
applications
of
organic
solar
cells
(OSCs).
In
this
study,
a
new
star‐shaped
trimer
acceptor
(TYT‐S)
is
developed
high‐performance
OSCs
with
PCE
19.0%,
high
photo‐stability
(
t
80%
lifetime
=
2600
h
under
1‐sun
illumination),
crack‐onset
strain
(COS)
21.6%
achieved.
The
isotropic
molecular
structure
TYT‐S
affords
efficient
multi‐directional
charge
transport
electron
mobility.
Furthermore,
its
amorphous
prevents
formation
brittle
crystal‐to‐crystal
interfaces,
significantly
enhancing
properties
OSC.
As
result,
TYT‐S‐based
demonstrate
higher
(19.0%)
stretchability
(COS
21.6%)
than
linear‐shaped
(TYT‐L)‐based
(PCE
17.5%
COS
6.4%)
small‐molecule
(MYT)‐based
16.5%
1.3%).
addition,
increased
size
TYT‐S,
relative
to
that
MYT
dimer
(DYT),
suppresses
diffusion
kinetics
molecules,
substantially
improving
photostability
OSCs.
Finally,
effectively
potential
intrinsically
stretchable
(IS)‐OSCs
constructed.
IS‐OSCs
exhibit
device
(strain
at
31%)
14.4%.
Chemical Society Reviews,
Год журнала:
2024,
Номер
53(9), С. 4674 - 4706
Опубликована: Янв. 1, 2024
This
review
summarizes
the
recent
progress,
key
design
principles
and
prospects
of
dimer
multimer
acceptors
for
developing
polymer
solar
cells
(PSCs)
with
high
efficiency
long-term
stability.
Advanced Materials,
Год журнала:
2023,
Номер
36(4)
Опубликована: Ноя. 23, 2023
Abstract
Giant
dimeric
acceptor
(G‐Dimer)
is
becoming
one
of
the
most
promising
organic
solar
cell
(OSC)
materials
because
its
definite
structure,
long‐term
stability,
and
high
efficiency.
Strengthening
hetero‐molecular
interactions
by
monomer
modification
greatly
influences
morphology
thus
device
performance,
but
lacks
investigation.
Herein,
two
novel
quinoxaline
core‐based
G‐Dimers,
Dimer‐QX
Dimer‐2CF,
are
synthesized.
By
comparing
trifluoromethyl‐substituted
Dimer‐2CF
non‐substituted
Dimer‐QX,
trifluoromethylation
effect
on
G‐Dimer
investigated
revealed.
The
trifluoromethyl
with
strong
electronegativity
increases
electrostatic
potential
reduces
surface
energy
G‐Dimer,
weakening
homo‐molecular
ordered
packing
reinforcing
interaction
donor.
suppresses
fast
assembly
during
film
formation,
facilitating
small
domains
molecular
in
blend,
which
a
trade‐off
conventional
control.
Together
favorable
vertical
phase
separation,
efficient
charge
generation,
reduced
bimolecular
recombination
concurrently
obtained.
Hence,
Dimer‐2CF‐based
OSCs
obtain
cutting‐edge
efficiency
19.02%
fill
factor
surpassing
80%,
an
averaged
extrapolated
T
80
≈12
000
h
under
continuous
°C
heating.
This
study
emphasizes
importance
strategy,
providing
facile
strategy
for
designing
highly
stable
OSC
materials.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(14)
Опубликована: Фев. 9, 2024
Abstract
Achieving
both
high
power
conversion
efficiency
(PCE)
and
device
stability
is
a
major
challenge
for
the
practical
development
of
organic
solar
cells
(OSCs).
Herein,
three
non‐fully
conjugated
dimerized
giant
acceptors
(named
2Y‐sites,
including
wing‐site‐linked
2Y‐wing,
core‐site‐linked
2Y‐core,
end‐site‐linked
2Y‐end)
are
developed.
They
share
similar
monomer
precursors
but
have
different
alkyl‐linked
sites,
offering
fine‐tuned
molecular
absorption,
packing,
glass
transition
temperature,
carrier
mobility.
Among
their
binary
active
layers,
D18/2Y‐wing
has
better
miscibility,
leading
to
optimized
morphology
more
efficient
charge
transfer
compared
D18/2Y‐core
D18/2Y‐end.
Therefore,
D18/2Y‐wing‐based
OSCs
achieve
superior
PCE
17.73
%,
attributed
enhanced
photocurrent
fill
factor.
Furthermore,
exhibit
balance
improved
stability,
distinguishing
them
within
2Y‐sites.
Building
on
success
2Y‐wing
in
systems,
we
extend
its
application
ternary
by
pairing
it
with
near‐infrared
absorbing
D18/BS3TSe‐4F
host.
Thanks
complementary
absorption
300–970
nm
further
morphology,
obtain
higher
19.13
setting
new
benchmark
dimer‐derived
OSCs.
This
approach
site
engineering
constructing
presents
promising
pathway
improve
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(9)
Опубликована: Янв. 3, 2024
Abstract
Morphological
control
of
all‐polymer
blends
is
quintessential
yet
challenging
in
fabricating
high‐performance
organic
solar
cells.
Recently,
solid
additives
(SAs)
have
been
approved
to
be
capable
tuning
the
morphology
polymer:
small‐molecule
improving
performance
and
stability
devices.
Herein,
three
perhalogenated
thiophenes,
which
are
3,4‐dibromo‐2,5‐diiodothiophene
(SA‐T1),
2,5‐dibromo‐3,4‐diiodothiophene
(SA‐T2),
2,3‐dibromo‐4,5‐diiodothiophene
(SA‐T3),
were
adopted
as
SAs
optimize
cells
(APSCs).
For
blend
PM6
PY‐IT,
benefitting
from
intermolecular
interactions
between
thiophenes
polymers,
molecular
packing
properties
could
finely
regulated
after
introducing
these
SAs.
In
situ
UV/Vis
measurement
revealed
that
assist
morphological
character
evolution
blend,
leading
their
optimal
morphologies.
Compared
as‐cast
device
:
all
SA‐treated
binary
devices
displayed
enhanced
power
conversion
efficiencies
17.4–18.3
%
with
obviously
elevated
short‐circuit
current
densities
fill
factors.
To
our
knowledge,
PCE
18.3
for
SA‐T1‐treated
ranks
highest
among
APSCs
date.
Meanwhile,
universality
SA‐T1
other
demonstrated
unanimously
improved
performance.
This
work
provide
a
new
pathway
realizing
APSCs.
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.