Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 7, 2024
Precise
modulating
the
vertical
structure
of
active
layers
to
boost
charge
transfer
is
an
effective
way
achieve
high
power
conversion
efficiencies
(PCEs)
in
organic
solar
cells
(OSCs).
Herein,
efficient
OSCs
with
a
well-controlled
are
realized
by
rapid
film-forming
method
combining
low
boiling
point
solvent
and
sequential
blade-coating
(SBC)
technology.
The
results
grazing
incident
wide-angle
X-ray
scattering
measurement
show
that
component
distribution
varied
changing
processing
solvent.
Novel
characterization
technique
such
as
tilt
resonant
soft
used
test
films,
demonstrating
dichloromethane
(DCM)-processed
film
truly
planar
heterojunction.
devices
chloroform
(CF)
processed
upper
layer
increased
mixed
phase
region
compared
these
toluene
(TL)
or
-DCM-,
which
beneficial
for
improving
generation
achieving
superior
PCE
17.36%.
Despite
significant
morphological
varies,
DCM-processed
perform
slightly
lower
16.66%,
highest
value
heterojunction
devices,
higher
tolerance.
This
work
proposes
solvent-regulating
optimize
through
SBC
technology,
provides
practical
guidance
optimization
active-layer
microstructure.
Chemical Society Reviews,
Journal Year:
2024,
Volume and Issue:
53(14), P. 7426 - 7454
Published: Jan. 1, 2024
Over
the
past
decades,
field
of
organic
solar
cells
(OSCs)
has
witnessed
a
significant
evolution
in
materials
chemistry,
which
resulted
remarkable
enhancement
device
performance,
achieving
efficiencies
over
19%.
The
photoactive
layer
OSCs
play
crucial
role
light
absorption,
charge
generation,
transport
and
stability.
To
facilitate
scale-up
OSCs,
it
is
imperative
to
address
photostability
these
electron
acceptor
donor
materials,
as
their
photochemical
degradation
process
remains
challenge
during
photo-to-electric
conversion.
In
this
review,
we
present
an
overview
development
emphasizing
aspects
chemical
stability
behavior
that
are
linked
OSCs.
Throughout
each
section,
highlight
pathways
for
link
degradation.
We
also
discuss
existing
interdisciplinary
challenges
obstacles
impede
photostable
materials.
Finally,
offer
insights
into
strategies
aimed
at
enhancing
future
directions
developing
photo-active
layers,
facilitating
commercialization
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 15, 2024
Abstract
All‐polymer
solar
cells
(all‐PSCs)
present
compelling
advantages
for
commercial
applications,
including
mechanical
durability
and
optical
thermal
stability.
However,
progress
in
developing
high‐performance
polymer
donors
has
trailed
behind
the
emergence
of
excellent
acceptors.
In
this
study,
we
report
a
new
electron‐deficient
arene,
fluorinated
bithiophene
imide
(F‐BTI)
its
donor
SA1,
which
two
fluorine
atoms
are
introduced
at
outer
β
‐positions
thiophene
rings
BTI
to
fine‐tune
energy
levels
aggregation
resulting
polymers.
SA1
exhibits
deep
HOMO
level
−5.51
eV,
wide
bandgap
1.81
eV
suitable
miscibility
with
acceptor.
Polymer
chains
incorporating
F‐BTI
result
highly
ordered
π–π
stacking
favorable
phase‐separated
morphology
within
all‐polymer
active
layer.
Thus,
:
PY‐IT‐based
all‐PSCs
exhibit
an
efficiency
16.31
%
stability,
is
further
enhanced
record
value
19.33
(certified:
19.17
%)
by
constructing
ternary
device.
This
work
demonstrates
that
offers
effective
route
materials
improved
optoelectronic
properties,
will
change
scenario
terms
stable
all‐PSCs.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 14, 2024
Developing
organic
solar
cells
(OSCs)
processable
with
halogen-free,
non-aromatic
solvents
is
crucial
for
practical
applications,
yet
challenging
due
to
the
limited
solubility
of
most
photoactive
materials.
This
study
introduces
high-performance
terpolymers
in
tetrahydrofuran
(THF)
by
incorporating
dithienophthalimide
(DPI)
into
PM6
backbone.
DPI
extends
absorption
band,
lowers
HOMO
levels,
and
improves
THF
film
crystallinity
through
its
large
dipole
moment
effect.
Optimal
PBD-10:L8-BO
devices
processed
achieved
a
competitive
power
conversion
efficiency
(PCE)
18.79%,
approaching
chloroform-processed
(19.04%).
By
introducing
PBTz-F
as
second
donor,
ternary
OSCs
reached
an
impressive
19.45%
PCE
when
THF.
improvement
stems
from
enhanced
photon
generation,
improved
morphology,
better
charge
transport,
longer
exciton
lifetimes,
efficient
dissociation
collection,
suppressed
recombination.
These
PCEs
18.79%
binary
blend
OSCs,
respectively,
represent
highest
reported
efficiencies
solvents.
work
demonstrates
significant
progress
eco-friendly
OSC
fabrication,
paving
way
more
sustainable
commercially
viable
photovoltaic
technologies.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 18, 2024
The
advent
of
next-generation
nonfullerene
acceptors
(NFAs)
has
propelled
major
advances
in
organic
solar
cells
(OSCs).
Here
we
report
an
NFA
design
incorporating
CF
Advanced Energy Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 5, 2025
Abstract
Organic
photovoltaics
(OPV)
are
a
promising
solar
cell
technology
well‐suited
to
mass
production
using
roll‐to‐roll
processes.
The
efficiency
of
lab‐scale
cells
has
exceeded
20%
and
considerable
attention
is
currently
being
given
understanding
minimizing
the
remaining
loss
mechanisms
preventing
higher
efficiencies.
While
recent
improvements
partly
owed
reducing
non‐radiative
recombination
losses
at
open
circuit,
low
fill
factor
(
FF
)
due
significant
transport
resistance
becoming
Achilles
heel
OPV.
term
refers
voltage
light
intensity‐dependent
charge
collection
in
low‐mobility
materials.
In
this
perspective,
it
demonstrated
that
even
highest
organic
(OSCs)
reported
to‐date
have
performance
can
be
attributed
lead
high
losses.
A
closer
look
material
properties
influencing
provided.
How
experimentally
characterize
quantify
described
by
providing
easy
follow
instructions.
Furthermore,
causes
theory
behind
detailed.
particular,
relevant
figures
merit
(FoMs)
different
viewpoints
on
integrated.
Finally,
we
outline
strategies
followed
minimize
these
future
cells.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 10, 2024
Concurrently
achieving
high
efficiency,
mechanical
robustness
and
thermal
stability
is
critical
for
the
commercialization
of
all-polymer
solar
cells
(APSCs).
However,
APSCs
usually
demonstrate
complicated
morphology,
primarily
attributed
to
polymer
chain
entanglement
which
has
a
detrimental
effect
on
their
fill
factors
(FF)
morphology
stability.
To
address
these
concerns,
an
end-group
extended
acceptor,
PY-NFT,
was
synthesized
studied.
The
analysis
showed
tightly
ordered
molecular
packing
mode
favorable
phase
separation
formed.
PM6
:
PY-NFT-based
device
achieved
exceptional
PCE
19.12
%
(certified
as
18.45
%),
outperforming
control
PY-FT
devices
(17.14
%).
This
significant
improvement
highlights
record-high
binary
APSCs.
aging
study
revealed
that
PY-NFT
blend
exhibited
excellent
morphological
stability,
thereby
superior
retaining
90
initial
efficiency
after
enduring
stress
(65
°C)
1500
hours.
More
importantly,
film
outstanding
ductility
with
crack
onset
strain
24.1
%.
Overall,
rational
chemical
structure
innovation,
especially
conjugation
extension
strategy
trigger
appropriate
stable
key
improved
robust
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 28, 2024
Abstract
Single‐component
organic
solar
cells
based
on
double
cable
polymers
have
achieved
remarkable
performance,
with
DCPY2
reaching
a
high
efficiency
of
over
13%.
In
this
study,
is
further
optimized
an
13.85%,
maintaining
fill
factor
(FF)
without
compromising
the
short
circuit
current.
Despite
its
intermixed
morphology,
shows
reduced
recombination
rate
compared
to
their
binary
counterpart
(PBDB‐T:Y‐O6).
This
slower
in
attributed
wavefunction
overlap
delocalized
charges,
by
spatially
separating
donor
and
acceptor
units
alkyl
linker,
thereby
restricting
pathways.
Adding
1,8‐diiodooctane
(DIO)
into
facilitating
aggregation,
allowing
free
charges
become
more
delocalized.
The
DIO‐assisted
aggregation
(5%
DIO)
evidenced
increased
pseudo‐pure
domain
size
Y‐O6.
Fine
molecular
control
at
donor/acceptor
interface
double‐cable
polymer
achieves
non‐geminate
under
efficient
charge
generation,
mobility,
carrier
lifetime,
achieving
superior
performance.
Nevertheless,
FF
still
limited
relatively
low
mobility
blend,
suggesting
potential
for
improvement
through
enhanced
higher‐dimensional
packing
material.
Chemistry of Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 2, 2025
Polymer
donors
are
a
key
component
for
high-performance
polymer
solar
cells
(PSCs),
and
the
emergence
of
giant
acceptors
presents
challenge
in
designing
accessible
that
improve
miscibility
device
performance.
In
this
study,
we
developed
series
quinoxaline
(Qx)-based
polymers
by
introducing
monosubstituted
conjugated
side
chains
employing
noncovalent
conformational
locks
to
maintain
backbone
rigidity.
This
approach
minimizes
steric
hindrance
enhances
molecular
rigidity
while
simplifying
synthesis,
potentially
reducing
cost
Qx-based
materials.
Among
these
polymers,
F
atom-substituted
PF-2F
demonstrated
superior
planarity
due
CH···F
hydrogen
bonds,
thereby
improving
crystallinity
with
tethered
dimeric
(DY2).
As
result,
binary
PSC
based
on
achieved
PCE
17.5%,
which
increased
18.3%
after
addition
additional
donor
D18
construct
ternary
PSCs.
work
highlights
how
asymmetric
modulate
photovoltaic
properties,
providing
new
insights
rational
design
materials
complement
acceptors.