Advanced Materials,
Год журнала:
2024,
Номер
36(19)
Опубликована: Фев. 7, 2024
Abstract
Single‐component
organic
solar
cells
(SCOSCs)
with
covalently
bonding
donor
and
acceptor
are
becoming
increasingly
attractive
because
of
their
superior
stability
over
traditional
multicomponent
blend
(OSCs).
Nevertheless,
the
efficiency
SCOSCs
is
far
behind
state‐of‐the‐art
OSCs.
Herein,
by
combination
advantages
three‐component
single‐component
devices,
this
work
reports
an
innovative
three‐in‐one
strategy
to
boost
performance
SCOSCs.
In
strategy,
three
independent
components
(PM6,
D18,
PYIT)
linked
together
create
a
new
active
layer
based
on
ternary
conjugated
block
copolymer
(TCBC)
PM6‐D18
‐b‐
PYIT
facile
polymerization.
Precisely
manipulating
component
ratios
in
polymer
chains
able
broaden
light
utilization,
promote
charge
dynamics,
optimize,
stabilize
film
morphology,
contributing
simultaneously
enhanced
Ultimately,
PYIT‐based
device
exhibits
power
conversion
(PCE)
14.89%,
which
highest
reported
Thanks
aggregation
restriction
each
chain
entanglement
system,
SCOSC
displays
significantly
higher
than
corresponding
two‐component
(PM6‐D18:PYIT)
(PM6:D18:PYIT).
These
results
demonstrate
that
promising
for
developing
stability.
Advanced Energy Materials,
Год журнала:
2024,
Номер
14(11)
Опубликована: Янв. 28, 2024
Abstract
The
thin
film
deposition
engineering
of
layer‐by‐layer
(LbL)
non‐fullerene
organic
solar
cells
(OSCs)
favors
vertical
phase
distributions
donor:acceptor
(D:A),
effectively
boosting
the
power
conversion
efficiency
(PCE).
However,
previous
strategies
mainly
aimed
at
optimizing
morphology
LbL
films,
and
paid
limited
attention
to
reproducibility
device
performance.
To
achieve
high
performance
maintain
reproducibility,
a
strategy
for
hierarchical
manipulation
in
OSCs
is
developed.
A
series
devices
are
fabricated
by
introducing
vacuum‐assisted
molecular
drift
treatment
(VMDT)
donor
or
acceptor
layer
individually
simultaneously
elucidate
functionalities
this
treatment.
Essentially,
VMDT
provides
an
extended
driving
force
manipulate
molecules,
resulting
well‐defined
distribution
ordered
packing.
These
enhancements
facilitate
improvement
D:A
interface
area
charge
transport
channel,
ultimately
contributing
impressive
PCEs
19.18%
from
18.27%
devices.
More
importantly,
using
overcomes
notorious
batch‐dependent
heat
degradation
issues
OSCs,
leading
excellent
batch‐to‐batch
enhanced
stability
This
reported
method
promising
available
industrial
laboratory
use
controllably
OSCs.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(38)
Опубликована: Апрель 27, 2024
Abstract
Obtaining
a
well‐accurate
vertical
distribution
active
layer
morphology
through
the
air‐printing
process
is
an
essential
task
for
achieving
efficient
scalable
large‐area
organic
solar
cells
(OSCs).
In
this
target,
desired
and
controllable
pseudo
planar
heterojunction
(PPHJ)
structure
with
suitable
phase
separation
developed
by
pre‐deposited
D18‐Cl
under
PM6:BTP‐eC9
film
via
eco‐friendly
manufacturing
method.
The
addition
of
regulates
molecular
crystallization
leads
to
ideal
stratification
while
simultaneously
suppressing
voltage
loss,
optimizing
energetic
disorder,
carrier
management.
Impressively,
optimal
PPHJ
devices
perform
superior
power
conversion
efficiencies
(PCEs)
19.05%
(100
nm),
17.33%
(300
14.14%
(4
cm
2
)
compared
BHJ
devices.
Importantly,
OSCs
also
exhibit
impressive
extrapolated
T
80
(the
time
required
reach
80%
initial
PCE)
long‐time
storage
operational
stability,
as
well
thermal
stability.
Advanced Energy Materials,
Год журнала:
2024,
Номер
14(30)
Опубликована: Май 11, 2024
Abstract
Cyanation
is
a
common
chemical
modification
strategy
to
fine‐tune
the
energy
levels
and
molecular
packing
of
organic
semiconductors,
especially
materials
used
in
solar
cells
(OSCs).
Generally,
cyanation
modify
end
groups
high‐performance
small‐molecule
acceptors
(SMAs).
However,
has
not
been
investigated
on
central
backbone
SMAs,
which
could
introduce
stronger
intermolecular
interaction
enhance
π–π
stacking
for
rapid
charge
transport.
This
paper,
first
time,
reports
new
benzo‐quinoxaline
core
synthesizes
two
novel
A‐DA'D‐A
type
named
BQx‐CN
BQx‐2CN,
with
mono‐
di‐cyanide
groups,
respectively.
Through
tailoring
number
CN
BQx‐CN‐based
OSC
exhibits
best
device
performance
18.8%,
significantly
higher
than
non‐cyano
BQx‐based
one.
The
reason
superior
devices
can
be
attributed
fine‐tuned
level,
packing,
ideal
phase
segregation,
lead
exciton
dissociation,
faster
transport,
suppressed
recombination,
therefore
highest
fill
factor
(FF)
power
conversion
efficiencies
(PCE).
research
demonstrates
effectiveness
SMAs
enhanced
better
OSCs.
Advanced Materials,
Год журнала:
2024,
Номер
36(19)
Опубликована: Фев. 7, 2024
Abstract
Single‐component
organic
solar
cells
(SCOSCs)
with
covalently
bonding
donor
and
acceptor
are
becoming
increasingly
attractive
because
of
their
superior
stability
over
traditional
multicomponent
blend
(OSCs).
Nevertheless,
the
efficiency
SCOSCs
is
far
behind
state‐of‐the‐art
OSCs.
Herein,
by
combination
advantages
three‐component
single‐component
devices,
this
work
reports
an
innovative
three‐in‐one
strategy
to
boost
performance
SCOSCs.
In
strategy,
three
independent
components
(PM6,
D18,
PYIT)
linked
together
create
a
new
active
layer
based
on
ternary
conjugated
block
copolymer
(TCBC)
PM6‐D18
‐b‐
PYIT
facile
polymerization.
Precisely
manipulating
component
ratios
in
polymer
chains
able
broaden
light
utilization,
promote
charge
dynamics,
optimize,
stabilize
film
morphology,
contributing
simultaneously
enhanced
Ultimately,
PYIT‐based
device
exhibits
power
conversion
(PCE)
14.89%,
which
highest
reported
Thanks
aggregation
restriction
each
chain
entanglement
system,
SCOSC
displays
significantly
higher
than
corresponding
two‐component
(PM6‐D18:PYIT)
(PM6:D18:PYIT).
These
results
demonstrate
that
promising
for
developing
stability.
