Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
137(1)
Published: Aug. 24, 2024
Abstract
Disordered
polymer
chain
entanglements
within
all‐polymer
blends
limit
the
formation
of
optimal
donor‐acceptor
phase
separation.
Therefore,
developing
effective
methods
to
regulate
morphology
evolution
is
crucial
for
achieving
morphological
features
in
organic
solar
cells
(APSCs).
In
this
study,
two
isomers,
4,5‐difluorobenzo‐
c
‐1,2,5‐thiadiazole
(SF‐1)
and
5,6‐difluorobenzo‐
(SF‐2),
were
designed
as
solid
additives
based
on
widely‐used
electron‐deficient
benzothiadiazole
unit
nonfullerene
acceptors.
The
incorporation
SF‐1
or
SF‐2
into
PM6
:
PY‐DT
blend
induces
stronger
molecular
packing
via
interaction,
leading
continuous
interpenetrated
networks
with
suitable
phase‐separation
vertical
distribution.
Furthermore,
after
treatment
SF‐2,
exciton
diffusion
lengths
films
are
extended
over
40
nm,
favoring
charge
transport.
asymmetrical
characterized
by
an
enhanced
dipole
moment,
increases
power
conversion
efficiency
(PCE)
PY‐DT‐based
device
18.83
%
due
electrostatic
interactions.
Moreover,
a
ternary
strategy
boosts
PCE
SF‐2‐treated
APSC
19
%.
This
work
not
only
demonstrates
one
best
performances
APSCs
but
also
offers
approach
manipulate
using
rational‐designed
additives.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
64(1)
Published: Aug. 24, 2024
Disordered
polymer
chain
entanglements
within
all-polymer
blends
limit
the
formation
of
optimal
donor-acceptor
phase
separation.
Therefore,
developing
effective
methods
to
regulate
morphology
evolution
is
crucial
for
achieving
morphological
features
in
organic
solar
cells
(APSCs).
In
this
study,
two
isomers,
4,5-difluorobenzo-c-1,2,5-thiadiazole
(SF-1)
and
5,6-difluorobenzo-c-1,2,5-thiadiazole
(SF-2),
were
designed
as
solid
additives
based
on
widely-used
electron-deficient
benzothiadiazole
unit
nonfullerene
acceptors.
The
incorporation
SF-1
or
SF-2
into
PM6
:
PY-DT
blend
induces
stronger
molecular
packing
via
interaction,
leading
continuous
interpenetrated
networks
with
suitable
phase-separation
vertical
distribution.
Furthermore,
after
treatment
SF-2,
exciton
diffusion
lengths
films
are
extended
over
40
nm,
favoring
charge
transport.
asymmetrical
characterized
by
an
enhanced
dipole
moment,
increases
power
conversion
efficiency
(PCE)
PY-DT-based
device
18.83
%
due
electrostatic
interactions.
Moreover,
a
ternary
strategy
boosts
PCE
SF-2-treated
APSC
19
%.
This
work
not
only
demonstrates
one
best
performances
APSCs
but
also
offers
approach
manipulate
using
rational-designed
additives.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 22, 2024
Abstract
Solution‐processed
bulk
heterojunction
(BHJ)
organic
solar
cells
(OSCs)
have
emerged
as
a
promising
next‐generation
photovoltaic
technology.
In
this
emerging
field,
there
is
growing
trend
of
employing
solid
additives
(SAs)
to
fine‐tune
the
BHJ
morphology
and
unlock
full
potential
OSCs.
SA
engineering
offers
several
significant
benefits
for
commercialization,
including
ability
i)
control
film‐forming
kinetics
expedite
high‐throughput
fabrication,
ii)
leverage
weak
noncovalent
interactions
between
materials
enhance
efficiency
stability
OSCs,
iii)
simplify
procedures
facilitate
cost‐effective
production
scaling‐up.
These
features
make
key
catalyst
accelerating
development
Recent
breakthroughs
shown
that
can
achieve
an
19.67%
in
single‐junction
demonstrating
its
effectiveness
promoting
commercialization
devices.
This
review
provides
comprehensive
overview
pivotal
contributions
SAs,
focusing
on
their
roles
governing
dynamics,
stabilizing
phase
separation,
addressing
other
crucial
aspects.
The
rationale
design
rules
SAs
highly
efficient
stable
OSCs
are
also
discussed.
Finally,
remaining
challenges
summarized,
perspectives
future
advances
offered.
National Science Review,
Journal Year:
2024,
Volume and Issue:
11(12)
Published: Nov. 4, 2024
ABSTRACT
Solid
additive
engineering
has
been
intensively
explored
on
morphology
tuning
for
highly
efficient
all-polymer
solar
cells
(all-PSCs),
a
promising
photovoltaic
technology
towards
multi-scenario
application.
Although
the
nano-fibrillar
network
of
active
layer
induced
by
treatment
is
confirmed
as
key
factor
power
conversion
efficiency
(PCE)
all-PSCs,
its
formation
mechanism
not
clearly
revealed,
lack
precise
and
convincing
real-time
observation
crystallization
phase
separation
during
liquid-to-solid
transition
process
spin-coating.
Herein
we
report
an
in-situ
grazing
incidence
wide-angle/small-angle
X-ray
scattering
(GIWAXS/GISAXS)
screening
that
reveals
fact
naphthalene
derived
solid
additives
can
suppress
aggregation
polymer
acceptor
(PY-IT)
at
beginning
stage
spin
coating,
which
provides
sufficient
time
space
donor
(PM6)
to
form
fibril
structure.
Moreover,
guided
this
knowledge,
ternary
system
proposed,
achieves
cutting-edge
level
PCEs
both
small-area
(0.04
cm2)
(also
decent
operational
stability)
large-area
(1
devices.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 26, 2024
Abstract
This
5th
annual
“
Emerging
PV
Report”
highlights
the
latest
advancements
in
performance
of
emerging
photovoltaic
(e‐PV)
devices
across
various
e‐PV
research
areas,
as
documented
peer‐reviewed
articles
published
since
August
2023.
Updated
graphs,
tables,
and
analyses
are
provided,
showcasing
several
key
parameters,
including
power
conversion
efficiency,
open‐circuit
voltage,
short‐circuit
current,
fill
factor,
light
utilization
stability
test
energy
yield.
These
parameters
presented
functions
bandgap
average
visible
transmittance
for
each
technology
application
contextualized
using
benchmarks
such
detailed
balance
efficiency
limit.
Journal of Materials Chemistry A,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Readily
available
2-methylnaphthalene
(2-MN)
was
demonstrated
as
a
volatile
solid
additive
to
achieve
good
win–win
situation
of
optimizing
among
efficiency,
cost
and
environmental
issues.
