ACS Materials Au,
Год журнала:
2024,
Номер
5(1), С. 57 - 71
Опубликована: Ноя. 8, 2024
The
integration
of
fluorinated
benzothiadiazole
(FBT)
into
donor–acceptor
(D–A)
copolymers
represents
a
major
advancement
in
the
field
organic
solar
cells
(OSCs).
fluorination
process
effectively
fine-tunes
energy
levels,
reduces
highest
occupied
molecular
orbital
and
enhances
open-circuit
voltages
polymers.
Furthermore,
improves
packing
crystallinity,
which
significantly
boosts
charge
transport
overall
device
performance.
This
review
provides
detailed
analysis
progress
made
with
FBT-based
polymers
OSCs,
classifying
these
materials
according
to
their
copolymerization
units.
It
discusses
design
strategies
structure–property
relationships
that
have
emerged
as
well
current
challenges
future
directions
for
optimizing
By
offering
comprehensive
overview
existing
research,
this
aims
facilitate
development
high-performance
photovoltaic
materials,
ultimately
contributing
sustainable
solutions.
Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 19, 2024
Abstract
Reduction
of
non‐radiative
energy
loss
(Δ
E
nr
)
in
all‐polymer
solar
cells
(all‐PSCs)
is
crucially
important
for
achieving
high
power
conversion
efficiencies
(PCEs).
Herein,
an
efficient
strategy
reported
to
reduce
the
Δ
by
introducing
luminescent
unit
into
backbone
polymer
acceptors.
Compared
device
based
on
PM6:PYDT,
all‐PSC
PM6:PYDT‐CzP‐9
has
decreased
from
0.188
0.183
eV.
This
reduction
attributed
improvement
electroluminescence
external
quantum
efficiency
(EQE
EL
).
The
shown
18%
increase
EQE
compared
PM6:PYDT
(8.4
×
10
−4
vs
7.1
),
demonstrating
that
incorporation
acceptors
highly
effective
enhancing
performance
all‐PSCs.
As
a
result,
yielded
V
OC
0.967
V,
without
sacrifice
short‐circuit
current
density
(23.42
mA
cm
−2
and
fill
factor
(77.5%),
leading
PCE
17.55%.
ABSTRACT
Layer‐by‐layer
(LBL)
process
has
emerged
as
a
promising
method
in
the
advancement
of
organic
photovoltaics,
emphasizing
scalability
and
reproducibility.
More
importantly,
it
provides
enhanced
morphological
control
for
boosting
carrier
mobility
(
μ
)
power
conversion
efficiency.
By
employing
multiscale
approach
that
combined
first‐principles
calculations,
molecular
dynamics
simulations,
kinetic
Monte
Carlo
methods,
relationship
between
LBL
morphology
engineering
donor/acceptor
(PM6/L8‐BO)
thin
films
is
elucidated.
During
solvent
evaporation,
order
solid‐phase
formation
was
top
surface,
bottom
region,
then
middle
region.
The
early
solid
precipitation
from
precursor
solutions
acceptor,
resulting
well‐ordered
arrangement
reducing
energy
disorder
acceptor
LUMO
levels.
Furthermore,
difference
disorders
A/D
blend
region
pure
A
or
D
domains
enabled
to
balance
electron
hole
mobilities,
thereby
mitigating
charge
accumulation
recombination.
LBL‐manufactured
presented
higher
=
1.9
×
10
−3
cm
2
V
−1
s
compared
bulk
heterojunction
(BHJ)
>
0.1
·V
).
These
mechanisms
provided
insights
into
strategies
enhancing
extraction
photo‐generated
carriers
through
engineering,
driving
development
efficient
photovoltaic
materials.
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 13, 2025
Abstract
Organic
solar
cells
(OSCs)
are
regarded
as
one
of
the
most
promising
flexible
power
sources
due
to
their
lightweight
and
properties,
with
improvement
photovoltaic
mechanical
performance.
To
improve
current
density
conversion
efficiency
(PCE),
mPh4F‐TS
(TS)
PYSe2F‐T
(PA)
introduced
into
binary
host,
PM6/mPh4F‐TT
(PM6/TT)
third
components.
It
is
demonstrated
that
corresponding
ternary
devices,
in
both
rigid
achieved
superior
efficiencies
(19.6%/17.7%
for
PM6/TT+TS,
19.2%/17.4%
PM6/TT+PA)
outperform
counterparts
(18.3%/16.4%).
However,
distinct
differences
performance
observed
between
polymer
acceptor
small‐molecular
(TS).
The
PM6/TT+PA
significantly
improved
stability
devices
a
lower
elastic
modulus
3.6
GPa,
while
PM6/TT+TS
resulted
opposite
effect
higher
5.5
GPa.
Through
in‐depth
investigation,
clear
correlation
modulus,
crack
density,
active
layer
blends
successfully
established,
revealing
key
role
reducing
enhancing
OSCs.
This
study
provides
important
guidance
development
high
robustness.
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 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.
Journal of Applied Polymer Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 25, 2025
ABSTRACT
Insufficiency
of
energy
resources
affects
the
economy
and
constitutes
a
global
crisis.
Solar
represents
an
immense
renewable
source,
various
photovoltaic
cells,
such
as
polymer
solar
are
being
developed
to
tap
make
it
available
for
consumption.
This
work
describes
synthesized
anthracene‐conjugated
polymers
with
alkoxyl
side‐chain
distributions
via
Horner–Wadsworth–Emmons
polyolefination
reactions.
Nuclear
magnetic
resonance
(NMR),
size
exclusion
chromatography
(SEC),
x‐ray
diffraction
(XRD)
were
used
characterize
polymers.
Electrochemical
optical
bandgaps
determined
by
cyclic
voltammetry
(CV),
while
absorption
measurements
performances
studied
using
different
optoelectrical
characterizations.
The
side
chains
impacted
power
conversion
efficiency
(PCE),
open‐circuit
voltage
(
V
OC
),
short‐circuit
current
density
J
SC
fill
factor
(FF)
optoelectronic
since
they
can
reduce
electron
deficiency
end
group
moiety,
leading
larger
bandgap.
properties
suggested
considerable
improvement
elaborated
cells'
performance
based
on
overcasts,
specifically
methanol
l
‐arginine
dissolved
in
methanol.
newly
exhibit
optimizable
promising
characteristics.
