Chinese Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 26, 2024
Comprehensive
Summary
The
power
conversion
efficiencies
(PCEs)
of
non‐fullerene
acceptor
(NFA)‐based
organic
solar
cells
(OSCs)
have
undergone
an
exciting
development
in
recent
years,
but
the
poor
intrinsic
stability
exocyclic
ethylene
bridges
NFAs
poses
a
significant
challenge
to
their
commercialization.
In
this
work,
we
propose
new
pyran‐locking
strategy
that
can
stabilize
bridge
connecting
strong
electron‐deficient
2‐(3‐oxo‐2,3‐dihydroinden‐1‐ylidene)malononitrile
end
group,
based
on
which
two
dimerized
(ITBIC‐F
and
TBTBIC‐F)
with
A‐D‐π‐A‐π‐D‐A
structure
been
successfully
synthesized
significantly
improved
chemical
photochemical
stabilities
comparison
traditional
without
ring‐locked
structure.
ITBIC‐F
TBTBIC‐F
‐based
OSCs
not
only
achieve
promising
PCEs
13.03%
10.01%,
respectively,
also
show
good
device
stability;
ITBIC‐F‐based
unencapsulated
devices
retain
75%
62%
initial
PCEs,
under
continuous
heat
(85
°C)
light
irradiation
(LED,
100
mW·cm
–2
)
nitrogen
atmosphere.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 3, 2025
Emerging
photovoltaics
for
outer
space
applications
are
one
of
the
many
examples
where
radiation
hard
molecular
semiconductors
essential.
However,
due
to
a
lack
general
design
principles,
their
resilience
against
extra-terrestrial
high-energy
can
currently
not
be
predicted.
In
this
work,
discovery
materials
is
accelerated
by
combining
strengths
high-throughput,
lab
automation
and
machine
learning.
This
way,
large
material
library
more
than
130
organic
hole
transport
automatically
processed,
degraded,
measured.
The
degraded
under
ultraviolet-C
(UVC)
light
in
nitrogen
atmosphere,
serving
as
conditions
electromagnetic
hardness
tests.
A
value
closely
related
differential
quantum
yield
photodegradation
extracted
from
evolution
UV–visible
(UV–vis)
spectra
over
time
used
stability
target.
Following
procedure,
ranking
spanning
3
orders
magnitude
was
obtained.
Combining
Gaussian
Process
Regression
based
on
predictors
structural
fingerprints
manual
filtering
features,
structure–stability
relations
UVC
stable
could
found:
Fused
aromatic
ring
clusters
beneficial,
whereas
thiophene,
methoxy
vinylene
groups
detrimental.
Comparing
UV–vis
film
solution,
bond
cleavage
made
out
leading
degradation
mechanism.
Even
though
principle
break
most
bonds,
able
distribute
dissipate
energy
well
enough
so
that
chemical
structures
remain
stable.
established
predictive
model
quantifies
effect
specific
features
stability,
allowing
chemists
consider
strategy.
future,
larger
data
set
will
allow
inversely
which
show
high
performance
at
same
time.
Solar RRL,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 5, 2025
The
morphology
of
active
layer
the
organic
solar
cells
(OSCs)
tends
to
transition
toward
its
lowest
energy
conformation
under
thermal
stress,
significantly
limiting
stability
OSCs.
In
this
study,
ethyl
cellulose
(EC)
is
utilized
as
an
additive
in
typical
PM6:Y6
and
other
systems.
Due
strong
interaction
between
hydroxyl
groups
EC
heteroatoms
semiconductors,
their
bulk
heterojunction
nanomorphology
locked,
thereby
enhancing
device
stability.
Under
stress
at
65
°C
for
1,000
h,
incorporating
demonstrates
excellent
nearly
without
performance
loss.
Furthermore,
compared
control
device,
exhibits
improved
a
range
more
stringent
aging
conditions.
Additionally,
shows
broad
applicability
various
systems,
effectively
This
work
offers
promising
approach
developing
stable
structures
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.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 16, 2025
Abstract
Organic
solar
cells
(OSCs)
have
garnered
significant
attention
owing
to
the
light
weight,
flexibility,
and
low
cost.
Continuous
improvement
in
molecular
design,
morphology
control,
device
fabrication
has
propelled
power
conversion
efficiency
of
OSCs
beyond
20%.
While
obtaining
long‐term
stability
is
still
a
critical
obstacle
for
commercialization
OSCs.
The
nano‐
microstructural
characteristics
active
layer
morphology—including
stacking,
phase
separation,
domain
sizes—play
pivotal
role
determining
performance.
Consequently,
comprehensive
understanding
how
film
structure
impacting
methods
control
are
vital
improving
lifetime.
This
review
seeks
elucidate
structure–performance
relationship
between
from
nanoscale
microscale
stability.
It
can
provide
rational
guidance
enhance
accelerating
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 26, 2025
Abstract
Recently,
benzene‐based
solid
additives
(BSAs)
have
emerged
as
pivotal
components
in
modulating
the
morphology
of
blend
film
organic
solar
cells
(OSCs).
However,
since
almost
all
substituents
on
BSAs
are
weak
electron‐withdrawing
groups
and
contain
halogen
atoms,
study
with
non‐halogenated
strong
has
received
little
attention.
Herein,
an
additive
strategy
is
proposed,
involving
incorporation
benzene
ring.
An
effective
BSA,
4‐nitro‐benzonitrile
(NBN),
selected
to
boost
efficiency
devices.
The
results
demonstrate
that
NBN‐treated
device
exhibits
enhanced
light
absorption,
superior
charge
transport
performance,
mitigated
recombination,
more
optimal
compared
additive‐free
OSC.
Consequently,
D18:BTP‐eC9+NBN‐based
binary
D18:L8‐BO:BTP‐eC9+NBN‐based
ternary
OSC
processed
by
solvent
achieved
outstanding
efficiencies
20.22%
20.49%,
respectively.
Furthermore,
universality
NBN
also
confirmed
different
active
layer
systems.
In
conclusion,
this
work
demonstrates
introduction
electron‐absorbing
moieties
ring
a
promising
approach
design
BSAs,
which
can
tune
achieve
highly
efficient
devices,
certain
guiding
significance
for
development
BSAs.
