Chinese Journal of Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 29, 2025
Comprehensive
Summary
Herein,
a
theory‐guided
ternary
construction
case
on
boosting
power
conversion
efficiency
(PCE)
for
all‐polymer
solar
cell
(all‐PSC)
is
reported,
where
guest
acceptor's
characteristics
include
high
miscibility
with
host
polymer
acceptor,
significantly
larger
optical
bandgap,
and
improved
luminescence.
Consequently,
only
10
wt%
PFFO‐Th
(third
component)
addition,
the
PCE
of
binary
control
promoted
to
18.55%
from
16.69%,
11.1%
relative
increase,
demonstrating
great
effectiveness
this
strategy.
Besides,
realized
at
state‐of‐the‐art
level
all‐PSCs
processed
by
ortho
‐xylene,
widely
acknowledged
green
non‐
halogenated
solvent
field.
This
study
shares
new
thought
designing
high‐performance
photovoltaic
devices
reduced
energy
losses
favorable
charge
dynamics,
which
would
nourish
future
development
all‐PSCs,
even
other
organic
electronics.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 28, 2025
Abstract
Simultaneously
mitigating
both
photovoltage
and
photocurrent
losses
is
crucial
for
organic
solar
cells
(OSCs)
to
approach
the
Shockley–Queisser
limit
of
ideal
efficiency.
Incorporating
a
narrower
bandgap
nonfullerene
acceptor
(NFA)
as
guest
component
into
host
donor:NFA
system
broadens
absorption
spectrum.
However,
this
can
also
increase
nonradiative
decay
rate
according
energy‐gap
law.
In
work,
ternary
OSCs
are
constructed
by
combining
narrow
AQx‐2F
(as
NFA)
with
lower
eC9
NFA),
significantly
enhancing
generation
without
compromising
photovoltage.
The
addition
acts
crystallization
inducer,
extending
period
increasing
ordered
packing
distance.
This
leads
suppressed
trap
states,
elevated
dielectric
constant,
prolonged
exciton
lifetime,
balanced
hole/electron
transport,
reduced
recombination
loss.
Consequently,
optimized
D18:AQx‐2F:eC9
achieve
champion
power
conversion
efficiency
(PCE)
20.6%
high
open‐circuit
voltage
0.937
V,
short‐circuit
current
density
27.2
mA
cm
−2
fill
factor
80.8%,
validated
an
independently
certified
PCE
20.0%,
establishing
new
benchmark
bulk
heterojunction
OSCs.
work
demonstrates
effective
method
simultaneously
mitigate
losses,
paving
way
high‐performance
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 7, 2025
Vertical
phase-separated
active
layer
morphology
is
essential
for
organic
solar
cells
(OSCs),
which
can
be
effectively
achieved
through
layer-by-layer
(LbL)
processing,
enabling
independent
optimization
of
donor
and
acceptor
layers.
Here,
we
present
a
novel
strategy
to
optimize
the
D18/L8-BO-based
OSCs
by
incorporating
polyfluoroquinoxaline-type
polymer
additives.
Three
quinoxaline-based
polymers
with
varying
fluorination
contents,
namely,
P2FQx,
P3FQx,
P4FQx,
were
synthesized
evaluated.
Although
these
showed
limited
performance
as
standalone
materials
in
bulk
heterojunction
(BHJ)
devices,
their
use
additives
LbL-OSCs
significantly
enhanced
device
efficiency.
These
promoted
D18
aggregation,
L8-BO
penetration,
facilitated
formation
vertically
interpenetrating
donor/acceptor
network.
Among
additives,
P2FQx
demonstrated
best
performance,
an
optimized
achieving
champion
power
conversion
efficiency
(PCE)
20.13%
well
high
fill
factor
(FF)
80.13%.
Our
results
highlight
potential
rationally
designed
address
morphology-related
challenges
provide
pathway
further
development
high-performance
scalable
photovoltaic
devices.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 11, 2025
Abstract
Connecting
small
molecule
acceptors
through
conjugated
or
nonconjugated
linker
to
form
giant
molecular
(GMAs)
represents
a
strategic
approach
enhancing
the
morphological
stability
of
organic
solar
cells
(OSCs).
In
this
study,
we
employed
benzothiadiazole
(BT)
as
typical
n
‐type
design
and
synthesize
two
GMAs
linking‐site
isomerization:
i‐BT‐DY
o‐BT‐DY.
Compared
i‐BT‐DY,
o‐BT‐DY
exhibits
enhanced
crystallinity
more
favorable
face‐on
orientation
but
lower
electron
mobility.
This
can
be
well
explained
by
theoretical
calculations,
demonstrates
delocalized
LUMO
distribution
significantly
stronger
intramolecular
super‐exchange
coupling
(43.7
meV
versus
22.2
for
o‐BT‐DY).
Additionally,
also
red‐shifted
absorption.
Combining
these
attributes,
PM6:
blend
achieved
an
impressive
power
conversion
efficiency
(PCE)
18.86%.
The
PCE
further
increased
19.49%
in
ternary
blend.
As
expected,
OSCs
based
on
both
exhibit
exceptional
long‐term
photostability
(T85%
>1000
hours).
work
deepens
our
understanding
how
linkers
at
different
linking
sites
influence
performance
GMAs,
concluding
that
interaction,
rather
than
intermolecular,
are
primary
factor
affecting
charge
transport
acceptors.
it
highlights
potential
components
OSCs.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 10, 2025
Abstract
Molecular
orientation
stands
as
the
quintessential
hallmark
of
conjugated
self‐assembled
monolayers
(SAMs),
which
have
recently
catalyzed
noteworthy
advancements
in
organic
photovoltaics
(OPVs).
Nevertheless,
an
unambiguous
understanding
these
directional
arrangements
and
their
impact
on
optoelectronic
properties
remains
elusive.
To
address
this
issue,
herein
three
SAMs
with
representative
orientations,
i.e.,
edge‐on
(BCZ‐1),
tilt‐on
(4PACz)
face‐on
(BCZ‐2)
are
meticulously
designed.
These
orientations
been
rigorously
validated
by
sum
frequency
generation
vibrational
spectroscopy
first‐principles
calculations.
Remarkably,
unequivocal
correlation
between
molecular
device
performance
is
discerned.
Particularly,
oriented
BCZ‐1
exhibits
largest
dipole
moment
normal
to
electrode,
accompanied
a
dense
uniform
coverage.
features
collectively
contribute
its
strongest
work
function
increment
for
ultra‐fast
hole
extraction
minimum
interfacial
carrier
recombination.
As
result,
champion
power
conversion
efficiency
19.93%
achieved
devices
based
D18:L8‐BO
active
layer,
representing
one
highest
values
reported
binary
bulk
heterojunction
OPVs.
Besides,
shows
great
potential
practical
applications
due
superior
up‐scalability
enhanced
shelf‐stability.
Overall,
offers
in‐depth
insights
into
behaviors
SAMs,
opening
new
avenues
unlock
Angewandte Chemie International Edition,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 7, 2025
Herein,
bis-sulfonimide
(BSI),
characterized
by
multiple
d-pπ
bonds
rather
than
typical
p-pπ
bonds,
is
unprecedently
utilized
as
a
general
and
extendable
building
block
to
develop
series
of
multifunctional
cathode
interlayer
materials
(CIMs)
for
organic
solar
cells
(OSCs).
An
illustrative
CIM,
BSIz-TT-PDI,
demonstrates
favorable
alcohol
processability,
superior
work
function
tunability,
appropriate
energy
levels,
strong
self-doping
effect,
decent
crystallinity.
These
attributes
contribute
its
high
conductivity
exceeding
5×10-3
S/cm,
well
precise
optimization
the
interfacial
connection
between
active
layer
metal
cathode.
Therefore,
BSIz-TT-PDI-based
OSCs
delivers
an
outstanding
efficiency
18.08
%
using
PM6:Y6
while
retaining
84
initial
performance
after
tracking
at
maximum
power
point
under
continuous
illumination
1100
hours.
Additionally,
devices
maintain
over
94
optimal
across
film
thickness
range
BSIz-TT-PDI
from
5
90
nm.
Moreover,
exhibits
compatibility
with
various
layers,
enabling
record
19.80
PM6:BTP-eC9:L8-BO
layer.
This
not
only
introduces
new
library
water/alcohol-soluble
n-type
semiconductors
containing
BSI,
also
pioneers
creation
thickness-insensitive
CIMs
stable
efficient
integrating
electron-withdrawing
components
bonds.
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 4, 2025
Abstract
Achieving
commercial
viability
for
organic
solar
cells
(OSCs)
requires
non‐toxic,
non‐halogenated
solvent
processing.
However,
poor
solubility
and
suboptimal
morphology
of
commonly
used
active
layer
materials
have
been
limiting
their
applications
high‐performance
OSCs.
This
study
introduces
a
novel
random
terpolymer,
PM7‐TTz50,
designed
to
overcome
these
challenges.
By
incorporating
50
mol%
co‐planar
thiophene‐thiazolothiazole
(TTz)
unit
into
the
PM7
backbones,
resulting
terpolymer
achieves
enhanced
in
eco‐friendly
solvents.
Furthermore,
PM7‐TTz50's
strong
aggregation
tendency,
coupled
with
high‐boiling‐point
processing—which
prolongs
aggregate/crystal
growth—enhances
molecular
stacking
ordering.
approach
supports
efficient
charge
transport
minimizes
non‐radiative
recombination,
yielding
power
conversion
efficiencies
(PCEs)
exceeding
19%
over
16%
w/o
additives.
Additionally,
PM7‐TTz50
demonstrates
broad
compatibility
various
non‐fullerene
acceptors
(NFAs),
leading
material
uniformity
reproducibility
device
fabrication.
Angewandte Chemie,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 7, 2025
Abstract
Herein,
bis‐sulfonimide
(BSI),
characterized
by
multiple
d
‐
p
π
bonds
rather
than
typical
bonds,
is
unprecedently
utilized
as
a
general
and
extendable
building
block
to
develop
series
of
multifunctional
cathode
interlayer
materials
(CIMs)
for
organic
solar
cells
(OSCs).
An
illustrative
CIM,
BSIz‐TT‐PDI,
demonstrates
favorable
alcohol
processability,
superior
work
function
tunability,
appropriate
energy
levels,
strong
self‐doping
effect,
decent
crystallinity.
These
attributes
contribute
its
high
conductivity
exceeding
5×10
−3
S/cm,
well
precise
optimization
the
interfacial
connection
between
active
layer
metal
cathode.
Therefore,
BSIz‐TT‐PDI‐based
OSCs
delivers
an
outstanding
efficiency
18.08
%
using
PM6:Y6
while
retaining
84
initial
performance
after
tracking
at
maximum
power
point
under
continuous
illumination
1100
hours.
Additionally,
devices
maintain
over
94
optimal
across
film
thickness
range
BSIz‐TT‐PDI
from
5
90
nm.
Moreover,
exhibits
compatibility
with
various
layers,
enabling
record
19.80
PM6:BTP‐eC9:L8‐BO
layer.
This
not
only
introduces
new
library
water/alcohol‐soluble
n‐type
semiconductors
containing
BSI,
also
pioneers
creation
thickness‐insensitive
CIMs
stable
efficient
integrating
electron‐withdrawing
components
bonds.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 17, 2025
The
rapid
advancement
of
solar
photovoltaic
technology
underscores
the
growing
significance
organic
cells
(OSCs)
in
renewable
energy
solutions.
A
critical
challenge
optimizing
OSC
performance
lies
achieving
precise
control
over
active
layer
nanomorphology.
In
this
study,
we
innovatively
introduce
a
high-boiling-point
liquid
additive,
1,2,4-trichlorobenzene
(1,2,4-TCB),
as
superior
alternative
to
conventional
additive
1,8-diiodooctane
(DIO).
Compared
DIO,
1,2,4-TCB
significantly
enhances
molecular
ordering
acceptors
and
improves
miscibility
between
donor
(D18)
acceptor
(Y6)
materials,
leading
notable
increase
power
conversion
efficiency
(PCE)
from
17.56%
18.80%.
It
has
been
revealed
that
promotes
packing,
particularly
for
molecules
grazing
incidence
wide-angle
X-ray
scattering.
contact
angle
measurements
further
demonstrate
improved
donor–acceptor
miscibility,
resulting
an
optimized
bicontinuous
interpenetrating
network
morphology.
This
morphology
effectively
exciton
separation,
facilitates
charge
transport,
minimizes
recombination
losses.
addition
improvements,
1,2,4-TCB-based
devices
exhibit
exceptional
photostability
(T80
=
981
h)
storage
stability
2708
h),
outperforming
their
DIO-based
counterparts.
These
findings
not
only
establish
potential
additives
like
boosting
but
also
provide
promising
strategy
advance
commercial
viability
technology.