In
this
work,
a
series
of
eco-friendly
solvent-processed
all-polymer
solar
cells
(APSCs)
were
fabricated
by
employing
the
sequentially
spin-coating
method.
Two
polymer
donor
materials
PBQx-TCl
and
PM6
deliberately
selected
due
to
their
similar
chemical
structure,
preferring
form
alloyed
state
for
better
exciton
dissociation
hole
transport
in
layer-by-layer
(LbL)
APSCs.
The
between
can
be
confirmed
from
PL
spectra
neat
blend
films,
as
well
short-circuit
current
densities
(JSC)
special
without
acceptor
layer.
optimized
ternary
LbL
APSCs
with
30
wt%
layer
exhibit
power
conversion
efficiency
(PCE)
18.55%,
originating
simultaneously
improved
JSC
25.16
mA
cm-2,
open-circuit
voltage
(VOC)
0.966
V,
fill
factor
76.33%.
increased
VOC
is
mainly
attributed
decreased
energy
loss
good
compatibility
two
donors.
PCE
18.55%
should
among
highest
values
processed
solvent.
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,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 10, 2025
Abstract
Advancements
in
narrow
bandgap
organic
small
molecule
acceptors
(SMAs)
has
promoted
solar
cell
(OSC)
efficiencies
beyond
20%.
Achieving
this
milestone
necessitates
precise
control
over
the
active
layer
morphology,
particularly
its
crystallinity
and
phase
distribution,
to
optimize
light
absorption,
charge
transport,
suppress
recombination.
However,
controlling
SMA
morphology
remains
a
significant
challenge
due
their
strong
aggregation
tendency.
Existing
methods,
including
high‐temperature
annealing,
introducing
high
boiling
point
additives,
frequently
yield
disordered
polymorphs
with
limited
scalability.
Here,
we
report
novel
approach
of
utilizing
4‐bromochlorobenzene
as
volatile
solid
additive
induce
formation
highly
ordered
polymorph
BTP‐eC9
through
mild
annealing
at
60
°C.
This
marks
first
demonstration
such
an
polymorph,
exhibiting
optical
properties
comparable
ideal
crystals,
enhanced
anisotropy,
refractive
index,
extinction
coefficients.
The
specific
further
enables
well‐organized
PM6
donor
arrangement,
establishing
optimal
bicontinuous
network
morphology.
Consequently,
OSCs
based
on
PM6:BTP‐eC9
achieve
power
conversion
efficiency
19.53%,
which
increases
20.32%
addition
antireflection
layer.
work
provides
scalable
effective
strategy
for
enhancing
OSC
performance
highlights
critical
role
polymorphism
optimizing
photovoltaic
performance.
Advanced Energy Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 10, 2025
Abstract
The
primary
challenge
in
the
commercialization
of
organic
photovoltaics
(OPVs)
is
ensuring
long‐term
stability,
making
study
their
degradation
mechanisms
essential.
This
centered
on
underlying
degradation,
providing
a
systematic
and
in‐depth
analysis
instability
factors.
A
clear
distinction
between
burn‐in
loss
established,
with
comprehensive
examination
governing
each
process.
review
highlights
how
pathways
vary
depending
external
environmental
factors
specific
device
layers,
while
also
identifying
key
indicators
for
mitigating
instability.
Furthermore,
this
work
extensively
discusses
analytical
tools
employed
stability
research,
offering
structured
overview
methodologies,
obtained
results,
practical
implications.
Advanced
high
potential
future
applications
are
introduced,
along
principles
prospective
contributions
to
analysis.
By
integrating
mechanistic
perspective
an
exploration
techniques,
provides
framework
understanding
OPV
offers
valuable
insights
into
development
effective
stabilization
strategies.
Journal of Materials Chemistry C,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
The
additive
1-phenylnaphthalene
(PN)
with
large
steric
hindrance
is
used
to
promote
J-aggregation
of
N3
molecules,
which
conductive
broadening
absorption
spectra
and
improving
charge
transport
for
high-performance
thick
OSCs.
In
this
work,
a
series
of
eco-friendly
solvent-processed
all-polymer
solar
cells
(APSCs)
were
fabricated
by
employing
the
sequentially
spin-coating
method.
Two
polymer
donor
materials
PBQx-TCl
and
PM6
deliberately
selected
due
to
their
similar
chemical
structure,
preferring
form
alloyed
state
for
better
exciton
dissociation
hole
transport
in
layer-by-layer
(LbL)
APSCs.
The
between
can
be
confirmed
from
PL
spectra
neat
blend
films,
as
well
short-circuit
current
densities
(JSC)
special
without
acceptor
layer.
optimized
ternary
LbL
APSCs
with
30
wt%
layer
exhibit
power
conversion
efficiency
(PCE)
18.55%,
originating
simultaneously
improved
JSC
25.16
mA
cm-2,
open-circuit
voltage
(VOC)
0.966
V,
fill
factor
76.33%.
increased
VOC
is
mainly
attributed
decreased
energy
loss
good
compatibility
two
donors.
PCE
18.55%
should
among
highest
values
processed
solvent.
