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 Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 2, 2024
Abstract
The
advantages
of
3D
materials
as
guest
components
ternary
organic
solar
cells
(TOSCs)
are
being
realized,
showing
great
potential
in
improving
device
performance.
However,
the
correlation
between
their
distinctive
structure
and
performance
remains
largely
unexplored.
Herein,
a
acceptor
named
SF‐HR
is
cost‐effectively
synthesized
utilizing
twisted
spirofluorene
core.
shows
an
edge‐on
oriented
packing
but
not
disordered
aggregation
other
molecules.
When
introduced
into
D18:Y6
binary
system,
can
induce
more
predominant
face‐on
finer
domain
size
blend,
which
facilitates
exciton
dissociation
multi‐direction
charge
transport.
Besides,
exhibits
complementary
absorption
cascaded
energy
levels
with
D18
Y6,
contributing
to
improvement
short‐circuit
current
density
(
J
sc
)
open‐circuit
voltage
V
oc
),
respectively.
Accordingly,
optimized
achieves
higher
0.893
V,
27.13
mA
cm
−2
,
fill
factor
(FF)
77.8%,
respectively,
than
that
host
device,
yielding
excellent
efficiency
18.85%.
This
success
demonstrates
utilization
crystalline
material
component
represents
promising
strategy
for
achieving
state‐of‐the‐art
OSCs,
conducive
understanding
relationship
from
new
perspective.
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
