Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 18, 2024
Abstract
A
key
factor
in
optimizing
organic
solar
cells
(OSCs)
is
the
precise
control
of
blend
film
morphology
to
enhance
exciton
dissociation
and
charge
transport.
Solid
additives
play
a
vital
role
this
process,
with
3D
polyhedral
or
spherical
molecules
being
ideal
candidates
due
their
delocalized
π‐orbitals
omnidirectional
However,
application
classical
fullerene
derivatives
as
limited
by
synthetic
complicacy
poor
solubility.
Herein,
potential
globally
aromatic
carboranyl
cages
solid
additives,
specifically
1‐amino‐
o
‐carborane
(CB‐NH
2
)
1‐carboxy‐
(CB‐COOH),
explored
fine‐tune
improve
performance
OSCs.
These
provide
an
extensive
surface
for
hydrogen
bonding
interactions,
which
serve
driving
force
manipulating
vertical
phase
separation
active
layer
crystallinity.
Remarkably,
CB‐NH
‐processed
devices
well‐tuned
yield
remarkable
power
conversion
efficiency
19.48%,
highlighting
effectiveness
on
improving
OSC
performance.
This
work
challenges
reliance
offers
new
insights
into
mechanisms
can
achieve
high
OSCs,
emphasizing
significance
molecular
engineering
development
next‐generation
cell
technology.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 3, 2024
Solvent
additives
with
a
high
boiling
point
(BP)
and
low
vapor
pressure
(VP)
have
formed
key
handle
for
improving
the
performance
of
organic
solar
cells
(OSCs).
However,
it
is
not
always
clear
whether
they
remain
in
active-layer
film
after
deposition,
which
can
negatively
affect
reproducibility
stability
OSCs.
In
this
study,
an
easily
removable
solvent
additive
(4-chloro-2-fluoroiodobenzene
(CFIB))
BP
VP
introduced,
behaving
like
volatile
solid
that
be
completely
removed
during
device
fabrication
process.
In-depth
studies
CFIB
addition
into
D18-Cl
donor
N3
acceptor
validate
its
dominant
non-covalent
intermolecular
interactions
through
effective
electrostatic
interactions.
Such
phenomena
improve
charge
dynamics
kinetics
by
optimizing
morphology,
leading
to
enhanced
D18-Cl:N3-based
devices
power
conversion
efficiency
18.54%.
The
CFIB-treated
exhibits
exceptional
thermal
(T80
lifetime
=
120
h)
at
85
°C
compared
CFIB-free
device,
because
morphological
robustness
evolving
no
residual
film.
features
combination
advantages
(easy
application)
(high
volatility)
additives,
demonstrating
great
potential
use
commercial
mass
production
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(25)
Published: April 18, 2024
Abstract
The
energy
loss
induced
open‐circuit
voltage
(
V
OC
)
deficit
hampers
the
rapid
development
of
state‐of‐the‐art
organic
solar
cells
(OSCs),
therefore,
it
is
extremely
urgent
to
explore
effective
strategies
address
this
issue.
Herein,
a
new
volatile
solid
additive
1,4‐bis(iodomethyl)cyclohexane
(DIMCH)
featured
with
concentrated
electrostatic
potential
distribution
utilized
act
as
morphology‐directing
guest
reduce
in
multiple
state‐of‐art
blend
system,
leading
one
highest
efficiency
(18.8%)
at
forefront
reported
binary
OSCs.
Volatile
DIMCH
decreases
radiative/non‐radiative
recombination
(Δ
E
2
/Δ
3
by
rationally
balancing
crystallinity
donors
and
acceptors
realizing
homogeneous
network
structure
crystal
domain
reduced
D–A
phase
separation
during
film
formation
process
weakens
disorder
trap
density
It
believed
that
study
brings
not
only
profound
understanding
emerging
additives
but
also
hope
further
improve
performance
ACS Applied Energy Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 10, 2025
Morphology
optimization
of
blend
films
is
an
essential
strategy
to
enhance
the
photovoltaic
performance
organic
solar
cells
(OSCs).
Additive
engineering
effective
for
fine-tuning
active
layer
morphology.
Given
limited
efforts
and
achievements
in
designing
synthesizing
liquid
additives,
new
solid
additives
manipulate
morphology
layers
have
gained
widespread
attention.
Herein,
1,4-dimethoxynaphthalene
(DMNA),
with
merits
simple
structure,
low
cost,
ecofriendliness,
successfully
incorporated
as
a
novel
additive
optimize
OSCs
based
on
D18-Cl:N3.
The
relationship
between
different
DMNA
contents
device
has
been
investigated.
It
found
that
can
be
effectively
regulated
by
DMNA,
leading
enhanced
molecular
packing
films,
which
favors
exciton
dissociation,
charge
transfer,
suppression
recombination.
As
result,
18.61%
power
conversion
efficiency
(PCE)
obtained
D18-Cl:N3
binary
devices
better
than
17.21%
PCE
control
device.
This
primarily
due
simultaneous
increase
short-circuit
current
density
fill
factor.
Furthermore,
general
applicability
confirmed
other
systems.
These
results
suggest
presents
potential
prospects
regulating
bulk
heterojunction
toward
high-performance
high-stability
OSCs.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 2, 2025
Stretchable
organic
solar
cells
(SOSCs)
have
great
application
prospects
to
serve
as
energy
supply
systems,
which
can
be
fully
incorporated
with
wearable
electronic
devices
achieve
truly
integrated
systems
that
are
stretchable
and
wearable.
However,
the
polymer
light-harvesting
active
layer
has
not
been
successfully
developed,
limits
development
of
cells.
In
this
regard,
a
series
donor
acceptor
polymers
designed
synthesized
by
introducing
amide
units
flexible
alkyl
segments
hydrogen
bonds
third
component
into
PM6
PY-IT
based
conjugated
backbones.
Hydrogen
dissipate
tensile
stress
for
high
stretchability.
addition,
reduce
impact
on
intermolecular
stacking,
thus
maintaining
good
photovoltaic
performance.
The
obtained
results
suggest
incorporation
(5
mol%
content)
efficiently
improve
stretchability
without
compromising
This
study
provides
an
understanding
properties,
offering
another
entry
molecular
design
guidelines
high-performance
polymers,
developing
cells,
further
promoting
devices.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 26, 2025
Abstract
Recently,
benzene‐based
solid
additives
(BSAs)
have
emerged
as
pivotal
components
in
modulating
the
morphology
of
blend
film
organic
solar
cells
(OSCs).
However,
since
almost
all
substituents
on
BSAs
are
weak
electron‐withdrawing
groups
and
contain
halogen
atoms,
study
with
non‐halogenated
strong
has
received
little
attention.
Herein,
an
additive
strategy
is
proposed,
involving
incorporation
benzene
ring.
An
effective
BSA,
4‐nitro‐benzonitrile
(NBN),
selected
to
boost
efficiency
devices.
The
results
demonstrate
that
NBN‐treated
device
exhibits
enhanced
light
absorption,
superior
charge
transport
performance,
mitigated
recombination,
more
optimal
compared
additive‐free
OSC.
Consequently,
D18:BTP‐eC9+NBN‐based
binary
D18:L8‐BO:BTP‐eC9+NBN‐based
ternary
OSC
processed
by
solvent
achieved
outstanding
efficiencies
20.22%
20.49%,
respectively.
Furthermore,
universality
NBN
also
confirmed
different
active
layer
systems.
In
conclusion,
this
work
demonstrates
introduction
electron‐absorbing
moieties
ring
a
promising
approach
design
BSAs,
which
can
tune
achieve
highly
efficient
devices,
certain
guiding
significance
for
development
BSAs.
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.
