ChemPhotoChem,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 18, 2024
Abstract
Low‐cost
organic
photovoltaic
(OPV)
devices
have
shown
enormous
potential
in
large‐scale
industrial
applications.
And
it
has
attracted
widespread
attention
the
past
few
decades.
However,
photophysical
characteristics
of
these
budget‐friendly
materials
haven't
been
explored
much.
Here,
low‐cost
small
materials,
including
molecule
1
(
asm1
)
with
ortho‐fluorinated
side
chain
and
2
asm2
meta‐fluorinated
were
selected
to
probe
fluorination
effect
on
absorption
spectra,
electrochemical
energy
levels,
electrostatic
(ESP),
etc.
The
results
show
that
molecules
good
planarity
backbone.
contributes
more
highest
occupied
molecular
orbital
less
lowest
unoccupied
than
.
Moreover,
differences
ESP
are
found
between
donor
acceptor
materials.
Furthermore,
strong
broad
light
visible
region
is
observed,
resulting
a
better
short‐circuit
current
density
for
constructed
by
donors
,
Y6
In
addition,
charge
transfer
mechanisms
characterized
asm1/Y6
system.
introduction
ortho‐fluorination
conjugated
favorable
approach,
which
will
provide
theoretical
guidance
further
design
experiments.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 6, 2025
The
long
exciton
diffusion
length
(LD)
plays
an
important
role
in
promoting
dissociation,
suppressing
charge
recombination,
and
improving
the
transport
process,
thereby
performance
of
organic
solar
cells
(OSCs),
especially
thick-film
OSCs.
However,
limited
LD
hinders
further
improvement
device
as
film
thickness
increases.
Here,
organic-metal
platinum
complex,
namely
TTz-Pt,
is
synthesized
served
a
solid
additive
into
D18-Cl:L8-BO
system.
addition
TTz-Pt
enhanced
crystallinity
blends,
reduced
energy
disorder,
trap
density,
decreased
non-radiative
recombination
binding
energy,
which
conducive
to
prolonging
TTz-Pt-treated
film,
facilitating
dissociation
process
along
with
inhibiting
recombination.
Consequently,
D18:L8-BO:IDIC
(100
nm)
exhibits
champion
power
conversion
efficiency
(PCE)
20.12%
(certified
19.54%),
one
highest
PCEs
reported
for
OSCs
date.
Remarkably,
record-breaking
PCE
18.84%
yielded
active
layer
300
nm.
Furthermore,
superior
universality
This
work
provides
simple
universal
approach
extending
by
introducing
complex
achieve
highly
efficient
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:
2025,
Volume and Issue:
unknown
Published: Feb. 27, 2025
Abstract
The
power
conversion
efficiency
of
organic
photovoltaics
(OPV)
has
recently
surpassed
20%.
However,
the
degradation
mechanisms
affecting
blends
based
on
these
materials
require
urgent
attention
to
improve
stability
such
devices
towards
long
timescales
necessary
for
commercialization.
In
this
work,
we
evaluated
OPVs
sustainable
and
scalable
donors
poly[(thiophene)‐alt‐(6,7‐difluoro‐2‐(2‐hexyldecyloxy)quinoxaline)]
(PTQ10)
poly[(5‐fluoro‐6‐((2‐hexyldecyl)oxy)benzo[c][1,2,5]thiadiazole)‐alt‐thiophene]
(FO6‐T)
blended
with
Y‐family
NFAs
different
side‐chain
lengths
processed
from
biorenewable
2MeTHF
PTQ10:Y12
FO6‐T:Y12
chloroform
FO6‐T:Y6
blends.
Superior
is
observed
an
extrapolated
T80
over
2000
h
under
LED
illumination,
a
more
stable
trend
metal
halide
lamps
illumination
compared
other
By
analyzing
thin
film
microstructure
using
Atomic
Force
Microscope
(AFM),
significant
phase
separation
in
Y6‐based
blend,
FO6‐T:Y12,
clear
red‐shift
UV–vis
profile.
superior
blend
attributed
less
morphological
upon
aging
increased
number
photogenerated
charges
degradation.
Finally,
through
series
light
intensity
temperature‐dependent
J–V
characterizations,
recombination
mechanisms.
Vertical
phase-separated
active
layer
morphology
is
essential
for
organic
solar
cells
(OSCs),
which
can
be
effectively
achieved
through
layer-by-layer
(LbL)
processing,
enabling
independent
optimization
of
donor
and
acceptor
layers.
Here,
we
present
a
novel
strategy
to
optimize
the
D18/L8-BO-based
OSCs
by
incorporating
polyfluoroquinoxaline-type
polymer
additives.
Three
quinoxaline-based
polymers
with
varying
fluorination
contents,
namely,
P2FQx,
P3FQx,
P4FQx,
were
synthesized
evaluated.
Although
these
showed
limited
performance
as
standalone
materials
in
bulk
heterojunction
(BHJ)
devices,
their
use
additives
LbL-OSCs
significantly
enhanced
device
efficiency.
These
promoted
D18
aggregation,
L8-BO
penetration,
facilitated
formation
vertically
interpenetrating
donor/acceptor
network.
Among
additives,
P2FQx
demonstrated
best
performance,
an
optimized
achieving
champion
power
conversion
efficiency
(PCE)
20.13%
well
high
fill
factor
(FF)
80.13%.
Our
results
highlight
potential
rationally
designed
address
morphology-related
challenges
provide
pathway
further
development
high-performance
scalable
photovoltaic
devices.
Angewandte Chemie International Edition,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 11, 2025
Abstract
Developing
electron‐deficient
(hetero)arenes
with
optimized
geometries
and
electronic
properties
is
imperative
for
advancing
n
‐type
polymers
organic
devices.
We
report
here
the
design
synthesis
of
two
chlorinated
imide‐functionalized
heteroarenes,
namely
chlorine‐substituted
bithiophene
imide
(ClBTI)
its
fused
dimer
(ClBTI2).
The
corresponding
show
a
near‐planar
framework,
appropriate
frontier
molecular
orbital
levels,
good
solubility.
When
integrated
into
thin‐film
transistors,
ClBTI2‐based
n‐type
polymer
afforded
unipolar
electron
mobility
up
to
0.48
cm
2
V
−1
s
.
binary
all‐PSCs
based
on
PM6
new
power
conversion
efficiency
(PCE)
exceeding
1%.
Interestingly,
by
introducing
these
ordered
structure,
high
crystallinity,
sizable
as
third
component
host
system
PM6:PY‐IT,
continuous
interpenetrating
networks
large
fibrillar
structures
can
be
formed.
Investigations
charge
transfer
kinetics
energy
loss
analyses
unveiled
that
P(ClBTI2‐BTI)
enables
transport,
reduced
recombination,
minimized
non‐radiative
within
all‐polymer
ternary
blends,
yielding
remarkable
PCE
19.35%
(certified:
19.20%)
through
optimizing
state‐of‐the‐art
PM6:PY‐IT
blend.
structure–property–performance
relationships
provide
valuable
insights
polymers,
marking
great
progress
in
development
high‐performance
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 16, 2025
Abstract
Boosting
power
conversion
efficiency
(PCE)
of
organic
solar
cells
(OSCs)
has
been
restricted
by
its
undesirably
high
energy
loss,
especially
for
those
nonhalogenated
solvent‐processed
ones.
Here,a
dichloro‐methoxylated
terminal
group
in
an
asymmetric
small
molecular
acceptor
design,
which
realizes
a
significantly
reduced
non‐radiative
loss
(0.179
eV)
compared
to
symmetric
counterpart
(0.202
eV),
is
reported.
Consequently,
the
device
improved
up
20%
PM6:BTP‐eC9‐4ClO,
without
sacrificing
photon
harvest
or
charge
transport
ability
control
system
PM6:BTP‐eC9.
Further
characterizations
reveal
BTP‐eC9‐4ClO's
blend
film
demonstrates
suppressed
triplet
state
formation,
enabled
enhanced
electron
delocalization.
In
addition,
BTP‐eC9‐4ClO
found
be
thermally
stabler
than
BTP‐eC9,
and
thus
providing
stability,
whose
T80
value
reaches
>
7800
h
under
80
°C
anneal
N
2
via
linear
extrapolation.
This
work
represents
state‐of‐the‐art
performance
binary
OSCs
with
certified
results
(19.45%).
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 9, 2024
Abstract
Pursuing
power
conversion
efficiency
(PCE)
is
the
priority
of
developing
organic
solar
cells
(OSCs)
based
on
low‐cost
completely
non‐fused
ring
acceptors.
Herein,
a
donor/acceptor
re‐intermixing
strategy
to
enhance
photon
capturing
process,
previously
established
well‐stratified
active
layer
morphology
reported.
By
adding
20
wt%
PTQ10
(polymer
donor)
into
acceptor's
precursor,
device
PCE
increased
16.03%
from
15.11%
D18/A4T‐16
control
system,
which
attributed
additional
charge
generation
interface
and
suppressed
bimolecular
recombination.
On
contrary,
using
equal
ratio
PM6
leads
significant
loss,
indicating
importance
considering
vertical
distribution
perspective
thermodynamics.
Moreover,
cutting‐edge
level
17.21%
for
acceptor
systems
realized
by
altering
PBQx‐TF/TBT‐26
PTQ11,
via
identical
processing
strategy.
This
work
thus
presents
attractive
engineering
cell
performance,
as
well
in‐depth
understanding.
Angewandte Chemie,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 11, 2025
Abstract
Developing
electron‐deficient
(hetero)arenes
with
optimized
geometries
and
electronic
properties
is
imperative
for
advancing
n
‐type
polymers
organic
devices.
We
report
here
the
design
synthesis
of
two
chlorinated
imide‐functionalized
heteroarenes,
namely
chlorine‐substituted
bithiophene
imide
(ClBTI)
its
fused
dimer
(ClBTI2).
The
corresponding
show
a
near‐planar
framework,
appropriate
frontier
molecular
orbital
levels,
good
solubility.
When
integrated
into
thin‐film
transistors,
ClBTI2‐based
n‐type
polymer
afforded
unipolar
electron
mobility
up
to
0.48
cm
2
V
−1
s
.
binary
all‐PSCs
based
on
PM6
new
power
conversion
efficiency
(PCE)
exceeding
1%.
Interestingly,
by
introducing
these
ordered
structure,
high
crystallinity,
sizable
as
third
component
host
system
PM6:PY‐IT,
continuous
interpenetrating
networks
large
fibrillar
structures
can
be
formed.
Investigations
charge
transfer
kinetics
energy
loss
analyses
unveiled
that
P(ClBTI2‐BTI)
enables
transport,
reduced
recombination,
minimized
non‐radiative
within
all‐polymer
ternary
blends,
yielding
remarkable
PCE
19.35%
(certified:
19.20%)
through
optimizing
state‐of‐the‐art
PM6:PY‐IT
blend.
structure–property–performance
relationships
provide
valuable
insights
polymers,
marking
great
progress
in
development
high‐performance
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.
Chinese Journal of Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 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.