Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(25)
Published: April 16, 2024
Abstract
Ternary
organic
solar
cells
(T‐OSCs)
represent
an
efficient
strategy
for
enhancing
the
performance
of
OSCs.
Presently,
majority
high‐performance
T‐OSCs
incorporates
well‐established
Y‐acceptors
or
donor
polymers
as
third
component.
In
this
study,
a
novel
class
conjugated
small
molecules
has
been
introduced
component,
demonstrating
exceptional
photovoltaic
in
T‐OSCs.
This
innovative
molecule
comprises
ethylenedioxythiophene
(EDOT)
bridge
and
3‐ethylrhodanine
end
group,
with
EDOT
unit
facilitating
creation
multiple
conformation
locks.
Consequently,
EDOT‐based
exhibits
two‐dimensional
charge
transport,
distinguishing
it
from
thiophene‐bridged
molecule,
which
displays
fewer
locks
provides
one‐dimensional
transport.
Furthermore,
robust
electron‐donating
nature
imparts
cascade
energy
levels
relative
to
electron
acceptor.
As
result,
OSCs
incorporating
component
demonstrate
enhanced
mobilities,
yielding
remarkable
efficiency
19.3
%,
surpassing
18.7
%
observed
thiophene‐based
The
investigations
study
underscore
excellence
building
block
constructing
materials
high
carrier
thereby
contributing
elevated
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(23)
Published: April 4, 2024
The
meta-stable
active
layer
morphology
of
organic
solar
cells
(OSCs)
is
identified
as
the
main
cause
rapid
burn-in
loss
power
conversion
efficiency
(PCE)
during
long-term
device
operation.
However,
effective
strategies
to
eliminate
associated
mechanisms
from
initial
stage
operation
are
still
lacking,
especially
for
high-efficiency
material
systems.
Herein,
introduction
molecularly
engineered
dimer
acceptors
with
adjustable
thermal
transition
properties
into
OSCs
serve
supramolecular
stabilizers
regulating
transitions
and
optimizing
crystallization
absorber
composites
reported.
By
establishing
intimate
π-π
interactions
small-molecule
acceptors,
these
can
effectively
reduce
trap-state
density
(N
Asymmetric
substitution
is
acknowledged
as
a
straightforward
yet
potent
approach
for
the
optimization
of
small
molecule
acceptors
(SMAs),
thereby
enhancing
power
conversion
efficiency
(PCE)
organic
solar
cells
(OSCs).
In
this
work,
we
have
successfully
engineered
and
synthesized
novel
asymmetric
SMA,
designated
Y6-R,
which
features
rhodanine-terminated
inner
side-chain.
devices
with
PM6
polymer
donor,
Y6-R
demonstrated
an
impressive
PCE
18.62%
open-circuit
voltage
(Voc)
0.863
V,
short-circuit
current
(Jsc)
27.89
mA
cm-2,
fill
factor
(FF)
77.35%,
much
higher
than
that
symmetric
SMA
Y6-based
(16.84%).
The
superior
performance
PM6:Y6-R
can
be
attributed
to
combination
factors,
including
upshifted
LUMO
energy
levels,
more
desired
exciton
dissociation,
collection,
extraction
capability,
well
reduced
recombination
suppressed
Eloss.
addition,
molecules
promote
coaggregation
behaviors
along
endowing
stronger
ordered
crystallinity
blend
films.
Our
findings
underscore
effectiveness
rhodanine-substitution,
representative
"A"
units,
SMAs
in
fine-tuning
behavior
efficiency.
Small,
Journal Year:
2023,
Volume and Issue:
20(8)
Published: Oct. 12, 2023
Recently,
the
power
conversion
efficiency
(PCE)
of
organic
solar
cells
(OSCs)
has
increased
dramatically,
making
a
big
step
toward
industrial
application
OSCs.
Among
numerous
OSCs,
benzodithiophene
(BDT)-based
OSCs
stand
out
in
achieving
efficient
PCE.
Notably,
single-junction
using
BDT-based
polymers
as
donor
materials
have
completed
PCE
over
19%,
indicating
dramatic
potential
for
preparing
high-performance
large-scale
This
paper
reviews
recent
progress
based
on
BDT
polymer
(PDMs).
The
development
is
concisely
summarized.
Meanwhile,
relationship
between
structure
PDMs
and
performance
further
described
this
review.
Besides,
prospect
single
junction
are
also
discussed.
Aggregate,
Journal Year:
2024,
Volume and Issue:
5(5)
Published: April 22, 2024
Abstract
Among
a
promising
photovoltaic
technology
for
solar
energy
conversion,
organic
cells
(OSCs)
have
been
paid
much
attention,
of
which
the
power
conversion
efficiencies
(PCEs)
rapidly
surpassed
over
20%,
approaching
threshold
potential
applications.
However,
device
stability
OSCs
including
storage
stability,
photostability
and
thermal
remains
to
be
an
enormous
challenge
when
faced
with
practical
The
major
causes
instability
are
rooted
in
poor
inherent
properties
light‐harvesting
materials,
metastable
morphology,
interfacial
reactions
highly
sensitive
external
stresses.
To
get
rid
these
flaws,
comprehensive
review
is
provided
about
recent
strategies
methods
improving
from
active
layers,
engineering
encapsulation
techniques
high‐performance
OSC
devices.
In
end,
prospectives
next
stage
development
devices
satisfactory
long‐term
afforded
community.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(25)
Published: April 16, 2024
Ternary
organic
solar
cells
(T-OSCs)
represent
an
efficient
strategy
for
enhancing
the
performance
of
OSCs.
Presently,
majority
high-performance
T-OSCs
incorporates
well-established
Y-acceptors
or
donor
polymers
as
third
component.
In
this
study,
a
novel
class
conjugated
small
molecules
has
been
introduced
component,
demonstrating
exceptional
photovoltaic
in
T-OSCs.
This
innovative
molecule
comprises
ethylenedioxythiophene
(EDOT)
bridge
and
3-ethylrhodanine
end
group,
with
EDOT
unit
facilitating
creation
multiple
conformation
locks.
Consequently,
EDOT-based
exhibits
two-dimensional
charge
transport,
distinguishing
it
from
thiophene-bridged
molecule,
which
displays
fewer
locks
provides
one-dimensional
transport.
Furthermore,
robust
electron-donating
nature
imparts
cascade
energy
levels
relative
to
electron
acceptor.
As
result,
OSCs
incorporating
component
demonstrate
enhanced
mobilities,
yielding
remarkable
efficiency
19.3
%,
surpassing
18.7
%
observed
thiophene-based
The
investigations
study
underscore
excellence
building
block
constructing
materials
high
carrier
thereby
contributing
elevated
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(15), P. 5719 - 5729
Published: Jan. 1, 2024
Efficient
3D
dimeric
acceptors
linking
two
monomers
with
flexible
alkyl
linkers
were
developed.
The
resulting
CH8-6-based
OSCs
achieved
a
high
PCE
of
19.2%
and
also
exhibited
excellent
thermal
stability
mechanical
flexibility.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
14(19)
Published: March 6, 2024
Abstract
Typical
bulk‐heterojunction
organic
photovoltaics
(OPV)
suffer
from
instability
due
to
the
slowly
diffusing
small‐molecule
acceptors
(SMAs)
under
operational
conditions.
The
originally
well‐phase‐separated
morphology
will
undergo
SMA
self‐aggregation
form
over‐purified
domains
that
deteriorate
OPV
performance.
This
issue
can
be
partially
alleviated
in
sequentially
processed
cells
with
a
planar‐mixed
heterojunction
absorber,
which
is
intrinsically
more
robust
larger
domain
sizes
and
lower
degree
of
mixing.
To
further
enhance
morphological
stability,
strategy
developed
inhibit
disordered
molecular
diffusion
leads
loss
crystallinity
domains.
Two
SMAs,
C9‐4F
Y6‐OBO,
are
incorporated
as
guest
an
alloy‐like
acceptor
host
BTP‐eC9.
These
improved
phase
by
promoting
ordered
packing,
effectively
restraining
diffusion‐caused
upon
illumination.
approach
helps
maintain
favorable
gradients
ultimately
ensures
stability.
Consequently,
derived
devices
exhibited
considerably
enhanced
T
80
lifetime
C9‐4F‐based
reaching
≈790
h
remarkable
≈1010
for
Y6‐OBO‐based
devices,
significantly
surpassing
≈450
observed
binary
devices.
Advanced Energy Materials,
Journal Year:
2023,
Volume and Issue:
14(5)
Published: Dec. 8, 2023
Abstract
Organic
photovoltaics
(OPVs)
have
recently
achieved
efficiencies
of
over
19%
and
are
well
underway
toward
practical
applications.
However,
issues
concerning
operational
stability
remain
a
major
challenge
ahead
OPV
commercialization.
Here,
when
replacing
the
conventional
hole‐transporting
layer
PEDOT:PSS
with
self‐assembled
monolayer
[2‐(3,6‐dichloro‐9H‐carbazol‐9‐yl)ethyl]phosphonic
acid
(3,6‐Cl‐2PACz)
or
[2‐(4,5‐dichloro‐9H‐carbazol‐9‐yl)ethyl]phosphonic
(4,5‐Cl‐2PACz)
it
is
found
that
T
80
lifetime
PM6:BTP‐eC9‐based
devices
can
be
improved
from
~100
to
~470
800
h,
respectively.
The
power
conversion
efficiency
also
17.29%
18.17%
18.67%,
performance
prolonged
photostability
in
4,5‐Cl‐2PACz‐based
stem
stabilized
vertical
distribution
donor
acceptor
components,
reducing
energetic
disorder
thus
alleviating
non‐radiative
recombination
losses.
It
further
surface
energy
4,5‐Cl‐2PACz‐modified
substrates
stays
constant
under
illumination
due
intrinsic
4,5‐Cl‐2PACz,
supporting
robust
active
morphology.
Applying
4,5‐Cl‐2PACz
ternary
device
PM6:BTP‐eC9:L8‐BO‐F
delivered
an
19.05%
1140
h.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(11), P. 6644 - 6651
Published: Jan. 1, 2024
We
report
a
series
of
hydroxylated
PDI
derivatives
as
CILs
with
exceptional
comprehensive
performance.
After
continuous
illumination,
the
extrapolated
T
80
lifetime
for
device
30
nm-thick
PDI-Br-3O
is
estimated
to
be
3995
h.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(48)
Published: Aug. 5, 2024
Abstract
Insulating
polymers
are
promising
components
for
constructing
high
performance
organic
solar
cells
(OSCs)
due
to
their
advantages
including
low
cost,
excellent
mechanical
properties,
and
feasibility
in
morphology
modulation.
However,
few
studies
have
been
conducted
on
the
effect
of
molecular
weight
insulating
corresponding
OSCs.
In
this
work,
polymethyl
methacrylate
(PMMA)
with
different
(named
as
PMMA
L
H
)
incorporated
into
a
range
polymer:nonfullerene
photovoltaic
systems.
It
is
found
that
although
both
can
suppress
energetic
disorder
nonradiative
energy
loss,
lead
enhanced
open‐circuit
voltage
OSCs,
distinct
property,
operational
stability
well
observed.
modulate
packing
host
more
effectively
its
superior
chain
segment
mobility
during
film‐forming
process,
which
drive
form
ordered
therefore
performance.
On
other
hand,
better
miscibility
system,
especially
C5‐16
acceptor,
be
dispersed
stable
framework
provides
properties
stability.
