ACS Applied Polymer Materials,
Год журнала:
2024,
Номер
6(20), С. 12644 - 12653
Опубликована: Окт. 8, 2024
In
this
study,
two
acceptor
units,
4,7-difluoronaphtho[2,1-b:3,4-b′]dithiophene
(4-DFT)
and
5,6-difluoronaphtho[2,1-b:3,4-b′]dithiophene
(5-DFT),
were
synthesized
with
high
yield
(>80%)
for
the
first
time.
Utilizing
these
wide-bandgap
(WBG)
donor–acceptor
(D–A)
copolymers,
o-PDFNT
p-PDFNT,
successfully
constructed.
The
optical
bandgaps
of
copolymers
determined
to
be
2.04
2.05
eV,
respectively.
study
revealed
that
fluorination
position
on
polymer
backbone
significantly
impacts
molecular
packing
charge
transport
properties.
Specifically,
p-PDFNT
at
5,6-position
exhibits
closer
π–π
stacking
higher
crystallinity
compared
o-PDFNT.
When
blended
BTP-eC9-4F,
p-PDFNT-based
organic
solar
cells
(OSCs)
demonstrated
a
power
conversion
efficiency
(PCE)
16.24%,
whereas
OSCs
based
showed
relatively
lower
PCE
13.56%.
This
indicates
potential
4-DFT
as
an
electron-deficient
unit
construction
efficient
donor
materials.
Furthermore,
research
highlights
crucial
role
altering
in
controlling
aggregation,
ultimately
benefiting
enhancement
photovoltaic
performance
OSCs.
Advanced Materials,
Год журнала:
2024,
Номер
36(37)
Опубликована: Май 30, 2024
Stretchable
organic
photovoltaics
(OPVs)
have
attracted
significant
attention
as
promising
power
sources
for
wearable
electronic
systems
owing
to
their
superior
robustness
under
repetitive
tensile
strains
and
good
compatibility.
However,
reconciling
a
high
power-conversion
efficiency
reasonable
flexibility
is
tremendous
challenge.
In
addition,
the
development
of
stretchable
OPVs
must
be
accelerated
satisfy
increasing
requirements
niche
markets
mechanical
robustness.
OPV
devices
can
classified
either
structurally
or
intrinsically
stretchable.
This
work
reviews
recent
advances
in
OPVs,
including
design
mechanically
robust
transparent
electrodes,
photovoltaic
materials,
devices.
Initially,
an
overview
characteristics
research
progress
areas
provided.
Subsequently,
into
flexible
electrodes
that
directly
affect
performances
summarized
analyzed.
Overall,
this
review
aims
provide
in-depth
understanding
intrinsic
properties
highly
efficient
deformable
active
while
also
emphasizing
advanced
strategies
simultaneously
improving
performance
layer,
material
design,
multi-component
settings,
structural
optimization.
Science,
Год журнала:
2025,
Номер
387(6732), С. 381 - 387
Опубликована: Янв. 23, 2025
Emerging
wearable
devices
would
benefit
from
integrating
ductile
photovoltaic
light-harvesting
power
sources.
In
this
work,
we
report
a
small-molecule
acceptor
(SMA),
also
known
as
non–fullerene
(NFA),
designed
for
stretchable
organic
solar
cell
(
s
-OSC)
blends
with
large
mechanical
compliance
and
performance.
Blends
of
the
organosilane-functionalized
SMA
BTP-Si4
polymer
donor
PNTB6-Cl
achieved
conversion
efficiency
(PCE)
>16%
ultimate
strain
(ε
u
)
>95%.
Typical
SMAs
suppress
OSC
blend
ductility,
but
addition
enhances
it.
Although
is
less
crystalline
than
other
SMAs,
it
retains
considerable
electron
mobility
highly
miscible
essential
enhancing
ε
.
Thus,
-OSCs
PCE
>
14%
operating
normally
under
various
deformations
(>80%
retention
an
80%
strain)
were
demonstrated.
Analysis
several
SMA-polymer
revealed
general
molecular
structure–miscibility–stretchability
relationships
designing
blends.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(46)
Опубликована: Июнь 26, 2024
Abstract
Mechanical
stretchability
is
a
vital
criterion
for
the
wearable
application
of
organic
solar
cells
(OSCs),
while
excessive
rigidity
fused‐ring
small
molecular
acceptors
make
photovoltaic
film
hard
to
meet
stretchable
requirements.
Herein,
an
effective
strategy
developed
construct
intrinsically
active
layer
by
inserting
copolymer
PM6
‐b‐
PYSe
as
interlayer
between
layer‐by‐layer
processed
D18
and
BTP‐eC9.
The
shunts
penetration
BTP‐eC9
facilitates
appropriate
phase
separation,
favoring
enhanced
crack
onset
strain
17.69%
compared
D18/BTP‐eC9
(9.67%).
Combining
with
optimal
energy
levels,
prolonged
carrier
lifetime,
suppressed
bimolecular
recombination
aroused
incorporation
PM6‐
b
‐PYSe,
D18/PM6‐
‐PYSe/BTP‐eC9‐based
OSC
yields
encouraging
efficiency
17.97%.
In
particular,
device
demonstrates
excellent
mechanical
property,
which
can
retain
over
80%
after
4000
bending
cycles.
This
work
provides
simultaneously
enhance
intrinsic
performance
flexible
OSCs.
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 2, 2025
Abstract
Inverted
organic
solar
cells
are
promising
due
to
their
better
stability
compared
conventional
structures.
Donors
with
low
synthetic
complexity
desirable
lower
costs.
However,
inverted
devices
rarely
used
in
low‐complexity
systems.
To
investigate
the
reasons,
PTQ10:BTP‐eC9
binary
system
is
benchmarked
against
high‐complexity
PM6:BTP‐eC9
system.
In
PTQ10:BTP‐eC9,
where
efficiency
of
lags
structure
significantly,
distinct
wetting
layers
observed
and
device
Conversely,
vertical
distribution
remains
unaffected
by
changes
interlayer
materials.
The
surface
always
enriched
BTP‐eC9,
but
less
for
PM6.
Importantly,
addition
PC
71
BM
reduces
nonuniform
composition
gradients.
As
concentration
increases,
PTQ10
approach
that
PTQ10:BTP‐eC9:PC
(1:1.2:0.4)
exhibits
negligible
differences
between
(14.01%)
(14.49%)
architectures.
concentration‐gradients
aredriven
interfacial
energy
active
layer
materials
casting
kinetics
case
surface.
Understanding
thermodynamic
kinetic
aspects
provides
valuable
insights
optimizing
performance
cells,
bringing
them
closer
practical
applications.
Journal of Materials Chemistry C,
Год журнала:
2023,
Номер
11(21), С. 6951 - 6962
Опубликована: Янв. 1, 2023
PPDI-DTFBT
not
only
possessed
better
molecular
planarity
and
lower
exciton
binding
energy
(
E
b
)
but
also
exhibited
faster
efficient
dissociation
transfer,
leading
to
an
increased
PCE
of
6.04%.
ACS Applied Materials & Interfaces,
Год журнала:
2023,
Номер
15(46), С. 53984 - 53995
Опубликована: Ноя. 7, 2023
This
work
presents
a
new
strategy
to
achieve
truly
black
electrochromic
film
and
develop
available
intelligent
eye-protection
filters
with
"day
mode"
"night
mode",
promising
minimize
the
harmful
effects
of
light
on
eyes.
The
soluble
red-to-transparent
polymer
P1
was
constructed
using
quinacridone
as
basic
unit
introduced
dual-donor
proDOT
DTC
units
similar
electron-donating
capabilities.
beneficial
broader
absorption
associated
in
results
ideal
spectrum
complementarity
P2
(cyan-to-transparent)
visible
region
(380-780
nm).
In
addition
complementary
colors,
both
polymers
exhibit
good
compatibility
respect
electrochemical
properties.
Therefore,
P1/P2
mass
ratio
1:1.5
for
blending
is
preferred
obtain
color
fast
switching
time
cyclic
stability.
Furthermore,
an
device
designed
assembled
layer
P3
featuring
yellow
(antiblue
ray)-to-dark
gray
change
ion
storage
layer.
prototype
demonstrated
applications
day-night
optical
adjustment
filters.
