ACS Applied Energy Materials,
Год журнала:
2024,
Номер
7(21), С. 10073 - 10080
Опубликована: Окт. 29, 2024
Giant
molecule
acceptors
(GMAs)
have
gained
considerable
attention
due
to
their
exceptional
device
stability,
repeatability,
and
high
power
conversion
efficiency
(PCE).
In
this
work,
we
synthesized
isomerized
electron-deficient
linkers
(trans-ICI
cis-ICI),
containing
two
active
methylenes,
employed
them
design
GMAs.
These
were
then
used
synthesize
A-DA′D-A
type
GMAs
(DY-cis-ICI
DY-trans-ICI)
through
a
metal-free
catalytic
Knoevenagel
condensation
reaction,
serving
as
an
alternative
the
common
Stille
coupling
method.
Notably,
nature
of
trans-ICI
cis-ICI
profoundly
influenced
molecular
conformations
GMAs,
with
DY-trans-ICI
adopting
dominant
S-type
conformation
DY-cis-ICI
C-type
conformation.
displays
broader
absorption
spectra
deeper
LUMO
energy
levels
compared
DY-cis-ICI.
The
PCEs
binary
organic
solar
cells
based
on
reach
14.50%
14.30%,
respectively.
This
study
highlights
effectiveness
promising
building
blocks
for
designing
Advanced Materials,
Год журнала:
2024,
Номер
36(41)
Опубликована: Сен. 1, 2024
This
study
underscores
the
significance
of
precisely
manipulating
morphology
active
layer
in
organic
solar
cells
(OSCs).
By
blending
polymer
donors
D18
with
varying
molecular
weights,
a
multiscale
interpenetrating
fiber
network
structure
within
is
successfully
created.
The
introduction
10%
low
weight
(LW-D18)
into
high
(HW-D18)
produces
MIX-D18,
which
exhibits
an
extended
exciton
diffusion
distance
and
orderly
stacking.
Devices
utilizing
MIX-D18
demonstrate
superior
electron
hole
transport,
improves
dissociation,
enhances
charge
collection
efficiency,
reduces
trap-assisted
recombination
compared
to
other
two
materials.
Through
use
nonfullerene
acceptor
L8-BO,
remarkable
power
conversion
efficiency
(PCE)
20.0%
achieved.
methodology,
integrates
favorable
attributes
polymers,
opens
new
avenue
for
enhancing
performance
OSCs.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 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.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
64(3)
Опубликована: Сен. 9, 2024
Abstract
This
study
puts
forth
a
novel
terminal
group
design
to
develop
medium‐band
gap
Y‐series
acceptors
beyond
conventional
side‐chain
engineering.
We
focused
on
the
strategical
integration
of
an
electron‐donating
methoxy
and
electron‐withdrawing
halogen
atom
at
benzene‐fused
groups.
combination
precisely
modulated
dipole
moment
electron
density
groups,
effectively
attenuating
intramolecular
charge
transfer
effect,
widening
band
acceptors.
The
incorporation
these
groups
yielded
two
asymmetric
acceptors,
named
BTP‐2FClO
BTP‐2FBrO,
both
which
exhibited
open‐circuit
voltage
(
V
oc
)
as
high
0.96
in
binary
devices,
representing
highest
OC
s
among
small
molecule
More
importantly,
BTP‐2FBrO
exhibit
modest
aggregation
behaviors
molecular
crystallinity,
making
them
suitable
third
component
mitigate
excess
PM6
:
BTP‐eC9
blend
optimize
devices’
morphology.
As
result,
optimized
BTP‐2FClO‐based
ternary
organic
solar
cells
(OSCs)
achieved
remarkable
power
conversion
efficiency
(PCE)
19.34
%,
positioning
it
highest‐performing
OSCs.
Our
highlights
importance
manipulating
moments
developing
offers
highly
efficient
for
high‐performance
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 13, 2025
Abstract
Organic
solar
cells
(OSCs)
are
regarded
as
one
of
the
most
promising
flexible
power
sources
due
to
their
lightweight
and
properties,
with
improvement
photovoltaic
mechanical
performance.
To
improve
current
density
conversion
efficiency
(PCE),
mPh4F‐TS
(TS)
PYSe2F‐T
(PA)
introduced
into
binary
host,
PM6/mPh4F‐TT
(PM6/TT)
third
components.
It
is
demonstrated
that
corresponding
ternary
devices,
in
both
rigid
achieved
superior
efficiencies
(19.6%/17.7%
for
PM6/TT+TS,
19.2%/17.4%
PM6/TT+PA)
outperform
counterparts
(18.3%/16.4%).
However,
distinct
differences
performance
observed
between
polymer
acceptor
small‐molecular
(TS).
The
PM6/TT+PA
significantly
improved
stability
devices
a
lower
elastic
modulus
3.6
GPa,
while
PM6/TT+TS
resulted
opposite
effect
higher
5.5
GPa.
Through
in‐depth
investigation,
clear
correlation
modulus,
crack
density,
active
layer
blends
successfully
established,
revealing
key
role
reducing
enhancing
OSCs.
This
study
provides
important
guidance
development
high
robustness.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 16, 2025
Abstract
The
electronic
transport
layer
(ETL)
based
on
perylene‐diimide
(PDI)
has
been
widely
demonstrated
for
efficient
organic
solar
cells
(OSCs).
However,
the
effect
of
ETL
materials
interfacial
traps
and
energy
losses
remains
understudied.
This
study
investigates
effects
dipole
distance
PDINN
interface
defects
using
three
specifically
designed
weak
acidic
with
varying
carboxyl
hydroxyl
group
amounts.
Among
these,
3,5‐dihydroxybenzoic
acid
(2OH),
moderate
pH
high
distance,
enhanced
intermolecular
forces
PDINN.
interaction
boosted
π–π
stacking,
ohmic
contact
active
Ag
electrode.
P‐2OH
film
exhibited
a
higher
more
uniform
potential
distribution,
suppressing
charge
recombination
at
interface,
reducing
trap
density
to
2.12
×
10
16
cm
3
,
non‐radiative
loss
∆E
from
0.236
0.174
eV.
Consequently,
decreased
0.553
0.484
meV
PM6:
BTP‐ec9/P‐2OH
device.
Notably,
decent
PCE
19.1%
is
achieved
(10
nm),
it
impressively
power
conversion
efficiency
(PCE)
16.4%
when
thickness
up
50
nm.
work
underscores
importance
groups
in
regulating
minimize
offers
insights
developing
thickness‐insensitive
interlayers
high‐performance
OSCs.
