Dehalogenation
plays
a
crucial
role
in
on-surface
synthesis,
but
the
bond-forming
sites
dehalogenation
occasionally
differ
from
original
halogen-substituted
sites,
leading
to
unexpected
products.
Revealing
its
mechanism
is
essential
for
atomically
precise
fabrication
of
low-dimensional
nanomaterials,
although
it
remains
elusive.
Herein,
we
report
an
isomerization
organometallic
polymers
derived
debromination
on
Ag(111)
and
elucidate
involving
intermolecular
hydrogen
transfer
via
combining
scanning
tunneling
microscopy,
noncontact
atomic
force
density
functional
theory
calculations.
At
room
temperature,
precursor
1,4-bis(3-bromothiophen-2-yl)benzene
undergoes
surface-assisted
Ag(111),
forming
two
where
correspond
sites.
Upon
annealing
393
K,
generates
linear
polymer,
mismatched
with
Control
experiments
combined
theoretical
calculations
demonstrate
that
proceeds
through
dissociation
polymer
chains
into
surface-stabilized
diradical
monomers
or
oligomers,
transfer,
final
recombination
radicals
Ag
adatoms.
National Science Review,
Год журнала:
2025,
Номер
12(3)
Опубликована: Янв. 21, 2025
Polymer
solar
cells
(PSCs)
leverage
blend
films
from
polymer
donors
and
small-molecule
acceptors
(SMAs),
offering
promising
opportunities
for
flexible
power
sources.
However,
the
inherent
rigidity
crystalline
nature
of
SMAs
often
embrittle
donor
in
constructed
bulk
heterojunction
structure.
To
address
this
challenge,
we
improved
stretchability
by
designing
synthesizing
a
tethered
giant
tetrameric
acceptor
(GTA)
with
increased
molecular
weight
that
promotes
entanglement
individual
SMA
units.
The
key
to
design
is
using
tetraphenylmethane
as
linking
core
create
three-dimensional
high
C2
symmetry
structure,
which
successfully
regulates
their
aggregation
relaxation
behavior.
With
GTA
acceptor,
its
PM6
exhibit
significantly
stretchability,
nearly
150%
increase
crack
onset
strain
value
compared
PM6:Y6.
Moreover,
PSCs
achieve
an
efficiency
up
18.71%
demonstrate
outstanding
photostability,
maintaining
>90%
initial
conversion
after
operating
over
1000
hours.
Our
findings
specifically
aligning
weights
more
closely
those
counterparts,
can
enhanced
without
compromising
morphological
stability
or
device
efficiency.
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Фев. 20, 2025
Abstract
Limited
by
large
batch
differences
and
inferior
polymerization
degree
of
current
polymer
acceptors,
the
potential
high
efficiency
stability
advantages
all-polymer
solar
cells
(all-PSCs)
cannot
be
fully
utilized.
Alternatively,
largely
π-extended
structurally
definite
oligomer
acceptors
are
effective
strategies
to
realize
overall
performance
acceptors.
Herein,
we
report
a
linear
tetramer
acceptor
namely
4Y-BO
with
identical
molecular
skeleton
comparable
molecular-weight
relative
control
PY-BO.
The
shows
refined
film-forming
kinetics
improved
ordering,
offering
uniform
crystallinity
donor
hence
well-defined
fibrous
heterojunction
textures.
Encouragingly,
PM6:4Y-BO
devices
achieve
an
up
19.75%
(certified
efficiency:19.58%),
surpassing
that
PM6:PY-BO
device
(15.66%)
ranks
highest
among
based
on
More
noticeably,
thermal
stability,
photostability
mechanical
flexibility
collectively
enhanced
for
devices.
Our
study
provides
important
approach
fabricating
stable
organic
photovoltaics.
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
Polymer Reviews,
Год журнала:
2024,
Номер
unknown, С. 1 - 65
Опубликована: Ноя. 20, 2024
The
biomedical
industry
has
witnessed
a
transformative
evolution
with
the
advent
of
3D
printing
technology.
However,
inherent
limitations,
such
as
inability
to
produce
dynamic
human
tissues
due
absence
temporal
dimension,
have
persisted,
resulting
in
static
and
inanimate
printed
products.
To
address
this
challenge
enable
creation
living
constructs,
concept
4D
emerged,
marking
paradigm
shift
additive
manufacturing.
In
printing,
time
becomes
fourth
breathing
life
into
previously
creations.
This
review
paper
explores
journey
from
pivotal
role
manufacturing
process.
Specifically,
it
highlights
integration
time-dependent
responsive
materials,
focusing
on
stimuli-responsive
hydrogels,
cornerstone
advancements.
These
materials
exhibit
remarkable
ability
adapt
respond
various
stimuli,
encompassing
physical,
chemical,
biological
signals.
delves
recent
publications
synergy
between
these
stimuli
shedding
light
their
intricate
interactions
potential
applications.
One
primary
areas
interest
lies
medical
applications,
notably
tissue
engineering,
where
holds
immense
promise.
utilization
creating
biomimetic
scaffolds
that
can
dynamically
complex
environments.
Furthermore,
discusses
technical
considerations
prospects
technology,
emphasizing
its
revolutionize
landscape.
amalgamation
opens
new
avenues
for
personalized
medicine,
localized
drug
delivery,
regenerative
therapies,
bridging
gap
requirements
modern
healthcare.
present
offers
complete
examination
evolution,
challenges,
paving
way
innovations
field.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 3, 2025
Abstract
The
development
of
organic
solar
cells
(OSCs)
with
high
efficiency
and
stability
is
highly
desirable
to
facilitate
its
commercial
applications.
Although
dimeric
acceptors
distinctive
advantages
have
been
widely
studied,
high‐performance
binary
OSCs
based
on
such
molecules
rarely
achieved.
In
this
work,
a
new
acceptor
(DY‐FL)
constructed
by
simultaneously
optimizing
the
linking
sites
units,
as
well
building
blocks.
Thanks
effective
molecular
design,
DY‐FL
provides
improved
stacking
for
fibrous
morphology
favorable
exciton/charge
dynamics.
Consequently,
DY‐FL‐based
render
superior
power
conversion
(PCE)
19.78%,
representing
record‐breaking
acceptors.
Importantly,
devices
display
significantly
enhanced
operational
under
external
stimuli
light
heat,
in
comparison
their
small
molecule
(Y‐F)‐based
counterpart.
These
findings
highlight
significance
blocks
modes,
providing
insight
into
design
strategy
state‐of‐the‐art
OSCs.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 15, 2024
Abstract
All‐polymer
solar
cells
(all‐PSCs)
present
compelling
advantages
for
commercial
applications,
including
mechanical
durability
and
optical
thermal
stability.
However,
progress
in
developing
high‐performance
polymer
donors
has
trailed
behind
the
emergence
of
excellent
acceptors.
In
this
study,
we
report
a
new
electron‐deficient
arene,
fluorinated
bithiophene
imide
(F‐BTI)
its
donor
SA1,
which
two
fluorine
atoms
are
introduced
at
outer
β
‐positions
thiophene
rings
BTI
to
fine‐tune
energy
levels
aggregation
resulting
polymers.
SA1
exhibits
deep
HOMO
level
−5.51
eV,
wide
bandgap
1.81
eV
suitable
miscibility
with
acceptor.
Polymer
chains
incorporating
F‐BTI
result
highly
ordered
π–π
stacking
favorable
phase‐separated
morphology
within
all‐polymer
active
layer.
Thus,
:
PY‐IT‐based
all‐PSCs
exhibit
an
efficiency
16.31
%
stability,
is
further
enhanced
record
value
19.33
(certified:
19.17
%)
by
constructing
ternary
device.
This
work
demonstrates
that
offers
effective
route
materials
improved
optoelectronic
properties,
will
change
scenario
terms
stable
all‐PSCs.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 30, 2024
Abstract
Oligomeric
acceptors
(OAs)
have
attracted
considerable
attention
in
the
organic
photovoltaics
(OPV)
field
owing
to
their
capacity
balancing
merits
from
both
monomeric
and
polymeric
acceptors.
A
delicate
control
over
distortion
between
blocks
of
OAs
usually
determines
performance
stability
relevant
OPV
devices.
However,
it
imposes
great
complexity
realize
a
controllable
degree
by
tuning
skeleton
position
linker
blocks.
Herein,
we
developed
facile
strategy
rationally
geometry
via
straightforward
substitution
alkoxy
side‐chains
on
This
helps
elucidate
integrated
influences
molecular
non‐bonded
contacts
selective
interactions
OA
molecules
host
acceptor
ternary
blend.
We
demonstrate
alkoxy‐OA
having
stronger
self‐interactions
would
mitigate
with
acceptor,
therefore
alleviating
kinetic
diffusion
excessive
aggregation
total
Combining
composite‐interlayer
introducing
phenyl‐substituted
self‐assembled
monolayer
enhance
doping
polyoxometalate,
an
impressive
efficiency
20.1
%
is
achieved
accompanied
negligible
burn‐in
loss
against
physical
aging.
study
demonstrates
validation
towards
high‐performance
burn‐in‐free
OPV.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 5, 2024
Abstract
Significant
advancements
in
power
conversion
efficiency
have
been
achieved
organic
solar
cells
with
small
molecule
acceptors.
However,
stability
remains
a
primary
challenge,
impeding
their
widespread
adoption
renewable
energy
applications.
This
review
summarizes
the
degradation
of
different
layers
within
device
structure
under
varying
conditions,
including
light,
heat,
moisture,
and
oxygen.
For
photoactive
layers,
chemical
pathways
polymer
donors
acceptors
are
examined
detail,
alongside
morphological
bulk
heterojunction
structure,
which
plays
crucial
role
performance.
The
mechanisms
commonly
used
anode
cathode
interlayers
electrodes
addressed,
as
these
significantly
influence
overall
stability.
Mitigation
methods
for
identified
provided
each
section
to
offer
practical
insights
improving
longevity.
Finally,
an
outlook
presents
remaining
challenges
achieving
long‐term
stability,
emphasizing
research
directions
that
require
further
investigation
enhance
reliability
performance
real‐world
Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 12, 2024
Abstract
To
enhance
the
performance
of
dimeric
acceptors
(DMAs)
based
organic
solar
cells
(OSCs),
two
new
DMAs,
designated
as
DC9‐HD
and
DYSe‐3,
are
rationally
developed
employed
to
fabricate
ternary
OSCs.
The
substitution
sulfur
atom
on
outer
ring
fused‐ring
core
with
a
selenium
resultes
in
red‐shifted
DYSe‐3.
Despite
these
minor
differences,
DYSe‐3
possess
nearly
identical
conjugated
skeletons,
which
contribute
their
similar
packing
motifs
crystallinities,
ultimately
enabling
high
degree
miscibility
between
DMAs.
Upon
incorporating
into
host
PM6:DC9‐HD
binary
blend,
fibril‐like
morphologies
featured
diameters
≈16.9
nm
reduced
charge
recombination
observed
PM6:DC9‐HD:DYSe‐3
blend.
More
importantly,
owing
long
exciton
diffusion
lengths
low
voltage
losses,
remarkable
power
conversion
efficiency
19.4%
is
achieved
for
OSCs,
alongside
delicate
balance
open‐circuit
short‐circuit
current
density.
This
super
result
comparable
best
oligomer
acceptor
OSCs
reported
date.
Furthermore,
proposed
strategy,
combines
one
polymer
donor
well‐compatible
not
only
retains
advantages
DMAs
but
also
offers
streamlined
approach
fabricating
high‐performance
