Understanding photochemical degradation mechanisms in photoactive layer materials for organic solar cells
Chemical Society Reviews,
Год журнала:
2024,
Номер
53(14), С. 7426 - 7454
Опубликована: Янв. 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
Язык: Английский
Halogenated Dibenzo[f,h]quinoxaline Units Constructed 2D‐Conjugated Guest Acceptors for 19% Efficiency Organic Solar Cells
Jingshun Gao,
Hairui Bai,
Ping Li
и другие.
Advanced Science,
Год журнала:
2024,
Номер
11(31)
Опубликована: Июнь 17, 2024
Abstract
Halogenation
of
Y‐series
small‐molecule
acceptors
(Y‐SMAs)
is
identified
as
an
effective
strategy
to
optimize
photoelectric
properties
for
achieving
improved
power‐conversion‐efficiencies
(PCEs)
in
binary
organic
solar
cells
(OSCs).
However,
the
effect
different
halogenation
2D‐structured
large
π‐fused
core
guest
Y‐SMAs
on
ternary
OSCs
has
not
yet
been
systematically
studied.
Herein,
four
2D‐conjugated
(X‐QTP‐4F,
including
halogen‐free
H‐QTP‐4F,
chlorinated
Cl‐QTP‐4F,
brominated
Br‐QTP‐4F,
and
iodinated
I‐QTP‐4F)
by
attaching
halogens
into
2D‐conjugation
extended
dibenzo[
f
,
h
]quinoxaline
are
developed.
Among
these
X‐QTP‐4F,
Cl‐QTP‐4F
a
higher
absorption
coefficient,
optimized
molecular
crystallinity
packing,
suitable
cascade
energy
levels,
complementary
with
PM6:L8‐BO
host.
Moreover,
among
PM6:L8‐BO:X‐QTP‐4F
blends,
PM6:L8‐BO:Cl‐QTP‐4F
obtains
more
uniform
size‐suitable
fibrillary
network
morphology,
well
vertical
phase
distribution,
thus
boosting
charge
generation,
transport,
extraction,
suppressing
loss
OSCs.
Consequently,
PM6:L8‐BO:Cl‐QTP‐4F‐based
achieve
19.0%
efficiency,
which
state‐of‐the‐art
based
superior
devices
host
(17.70%)
guests
H‐QTP‐4F
(18.23%),
Br‐QTP‐4F
(18.39%),
I‐QTP‐4F
(17.62%).
The
work
indicates
that
promising
gain
efficient
Язык: Английский
Halogenation Engineering of Solid Additives Enables 19.39% Efficiency and Stable Binary Organic Solar Cells via Manipulating Molecular Stacking and Aggregation of Both Donor and Acceptor Components
Wenyan Su,
Xuming Zhou,
Qiang Wu
и другие.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 3, 2024
Abstract
By
selectively
interacting
with
acceptor
components,
various
typed
solid
additives
achieve
boosted
power
conversion
efficiency
(PCE)
in
organic
solar
cells
(OSCs).
However,
due
to
the
efficient
active
layer
being
composed
of
donor
and
materials,
it
is
difficult
obtain
desired
morphology
by
manipulating
component
alone,
limiting
further
improvement
PCEs.
Herein,
two
a
same
backbone
thiophene‐benzene‐thiophene
(halogen‐free
D1‐H)
but
different
halogen
substituents
(fluorinated
D1‐F
chlorinated
D1‐Cl)
are
developed
probe
working
mechanism
halogenated
variation
OSCs.
Unlike
D1‐H
continuous
charge
distributions,
D1‐Cl
show
isolated
positive
distribution
benzene‐core
negative
thiophene,
offering
stronger
non‐covalent
interactions
both
(PM6)
(L8‐BO),
especially
D1‐Cl.
Consequently,
D1‐Cl‐treated
obtains
an
optimized
phase
separation
improved
molecular
packing,
boosting
PCE
18.59%
device
stability
OSCs,
17.62%
for
D1‐H‐treated
counterparts.
Moreover,
using
D18:L8‐BO
D18:BTP‐eC9
as
layers,
binary
OSCs
impressive
PCEs
19.29%
19.39%,
respectively.
This
work
indicates
that
halogenation
engineering
can
effectively
regulate
improving
elucidates
underlying
mechanism.
Язык: Английский
Conjugated π-Extension of Small Molecular Nonfullerene Acceptor for Efficient Ternary Organic Solar Cells with an Efficiency of 19.10%
Energy & Fuels,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 14, 2025
In
this
study,
we
have
successfully
incorporated
a
small
molecular
acceptor,
Y-LC,
with
conjugated
π-extension
as
secondary
acceptor
in
the
PM6:BTP-eC9-based
organic
photovoltaics.
The
performance
of
device
was
significantly
promoted
from
18.45%
binary
system
PM6:BTP-eC9
to
over
19%
ternary
minimal
Y-LC
loading.
This
enhancement
can
be
attributed
alloy-like
structures
acceptors
and
optimized
active
layer
morphology,
which
leads
improved
hole
electron
mobilities,
thereby
suppressing
charge
recombination,
finally
resulting
higher
photocurrent
solar
cells.
Furthermore,
complementary
absorption
is
observed
PM6
BTP-eC9,
broaden
spectrum
photoactive
enable
more
photons
sunlight
absorbed.
Additionally,
facilitates
efficient
transfer
donor
by
forming
cascade
energy
levels
between
BTP-eC9.
These
advantages
collectively
contribute
superior
obtained
work
also
highlights
that
adoption
nonfullerene
suitable
π-extensions
minor
additive
photovoltaics
powerful
approach
for
achieving
state-of-the-art
Язык: Английский
Precise Control Over Crystallization Kinetics by Combining Nucleating Agents and Plasticizers for 20.1% Efficiency Organic Solar Cells
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 11, 2025
Abstract
Obtaining
controllable
active
layer
morphology
plays
a
significant
role
in
boosting
the
device
performance
of
organic
solar
cells
(OSCs).
Herein,
quaternary
strategy,
which
incorporates
polymer
donor
D18‐Cl
and
small
molecule
acceptor
AITC
into
host
D18:N3,
is
employed
to
precisely
modulate
crystallization
kinetics
for
favorable
evolution
within
layer.
In
situ
spectroscopic
measurements
during
film‐formation
demonstrate
that
while
works
as
nucleator
promote
aggregation
D18
foster
donor/acceptor
intermixing,
has
exactly
opposite
impact
on
N3
intermixing
acceptor,
working
plasticizer.
The
mutually
compensational
effect
dual‐guests,
result,
enables
synergistic
control
over
fibrillar
networks,
multi‐length
scale
morphology,
vertical
phase
distribution,
leading
optimized
3D
greatly
enhanced
exciton
dissociation
charge
transfer,
suppressed
recombination,
reduced
energy
loss.
Consequently,
OSCs
based
D18:D18‐Cl:N3:AITC
achieved
an
excellent
power
conversion
efficiency
20.1%,
represents
one
highest
efficiencies
single‐junction
OSCs.
This
work
presents
effective
strategy
regulate
toward
advanced
high‐performance
Язык: Английский
Dimeric Small Molecule Acceptors via Terminal‐End Connections: Effect of Flexible Linker Length on Photovoltaic Performance
Macromolecular Rapid Communications,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 3, 2024
Abstract
The
dimerization
of
small
molecule
acceptors
(SMAs)
holds
significant
potential
by
combining
the
advantages
both
SMAs
and
polymer
in
realizing
high
power
conversion
efficiency
(PCE)
operational
stability
organic
solar
cells
(OSCs).
However,
advancements
selection
innovation
dimeric
linkers
are
still
challenging
enhancing
their
performance.
In
this
study,
three
new
acceptors,
namely
DY‐Ar‐4,
DY‐Ar‐5,
DY‐Ar‐6
synthesized,
linking
two
Y‐series
SMA
subunits
via
an
“end‐to‐end”
strategy
using
flexible
spacers
(octyl,
decyl,
dodecyl,
respectively).
influence
spacer
lengths
on
device
performance
is
systematically
investigated.
results
indicate
that
DY‐Ar‐5
exhibits
more
compact
ordered
packing,
leading
to
optimal
morphology.
OSCs
based
PM6:
achieves
a
maximum
PCE
15.76%,
attributes
enhance
balance
carrier
mobility,
reduce
recombination.
This
suitable
non‐conjugated
units
provides
rational
principle
for
designing
high‐performance
non‐fullerene
acceptors.
Язык: Английский
Weak Absorptive Component Boosts Exciton Dissociation in Indoor Organic Photovoltaics
Chinese Journal of Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 19, 2025
Comprehensive
Summary
Indoor
organic
photovoltaic
(OPV)
cells
have
emerged
as
promising
candidates
for
harvesting
energy
from
artificial
light
sources.
However,
the
limited
spectral
range
and
low
photon
flux
of
indoor
sources
restrict
photocurrent
power
output
these
devices.
In
this
work,
we
investigate
role
a
weak
absorptive
third
component
in
enhancing
exciton
dissociation
improving
OPV
performance.
By
introducing
eC9‐2Cl
into
D18‐Cl:F‐BTA3
binary
system,
create
ternary
blend
that
demonstrates
significant
improvements
device
efficiency.
Transient
absorption
spectroscopy
time‐resolved
photoluminescence
measurements
reveal
facilitates
efficient
transfer
dissociation.
Under
lighting
conditions,
where
acts
component,
devices
exhibit
conversion
efficiency
increase
24.7%
to
26.2%.
These
findings
highlight
potential
components
optimizing
processes
overcoming
limitations
systems.
Язык: Английский
Non‐Halogenated Solvent Processed Ternary All‐Polymer Solar Cell with PCE of 18.55% Enabled by Two Compatible Polymer Acceptors†
Chinese Journal of Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 29, 2025
Comprehensive
Summary
Herein,
a
theory‐guided
ternary
construction
case
on
boosting
power
conversion
efficiency
(PCE)
for
all‐polymer
solar
cell
(all‐PSC)
is
reported,
where
guest
acceptor's
characteristics
include
high
miscibility
with
host
polymer
acceptor,
significantly
larger
optical
bandgap,
and
improved
luminescence.
Consequently,
only
10
wt%
PFFO‐Th
(third
component)
addition,
the
PCE
of
binary
control
promoted
to
18.55%
from
16.69%,
11.1%
relative
increase,
demonstrating
great
effectiveness
this
strategy.
Besides,
realized
at
state‐of‐the‐art
level
all‐PSCs
processed
by
ortho
‐xylene,
widely
acknowledged
green
non‐
halogenated
solvent
field.
This
study
shares
new
thought
designing
high‐performance
photovoltaic
devices
reduced
energy
losses
favorable
charge
dynamics,
which
would
nourish
future
development
all‐PSCs,
even
other
organic
electronics.
Язык: Английский
Volatile Additive Assists Binary Layer‐by‐Layer Solution Processing Organic Solar Cells to Achieve 19% Efficiency
Chinese Journal of Chemistry,
Год журнала:
2024,
Номер
42(24), С. 3581 - 3587
Опубликована: Ноя. 4, 2024
Comprehensive
Summary
Layer‐by‐layer
(LbL)
solution
processing
is
an
efficient
method
to
realize
high
performance
organic
solar
cells
(OSCs).
One
of
the
drawbacks
LbL‐processed
active
layer
large
difference
in
crystallinity
donor
and
acceptor,
which
will
lead
imbalance
charge
transfer
result
unfavorable
recombination.
Herein,
we
combined
a
novel
volatile
additive
3,5‐dichloro‐2,4,6‐
trifluorobenzotrifluoride
(DTBF)
with
LbL
high‐efficiency
OSCs.
DTBF
interacts
non‐fullerene
acceptor
BTP‐4F
by
non‐covalent
bonding,
enhances
compact
stacking
BTP‐4F.
doped
OSC
has
balanced
electron
transport
properties,
longer
carrier
lifetime,
higher
exciton
dissociation
collection
efficiencies,
lower
energetic
disorder
than
control
without
any
additives.
Benefiting
from
optimization
dynamics
micro‐morphology
DTBF,
binary
achieved
synergistic
improvements
open‐circuit
voltage,
short‐circuit
current
density
fill
factor.
As
result,
champion
power
conversion
efficiency
(
PCE
)
19%
realized
for
DTBF‐optimized
OSC,
superior
(17.55%).
This
work
demonstrates
promising
approach
modulate
morphology
fabricate
Язык: Английский