Advanced Materials,
Год журнала:
2023,
Номер
35(28)
Опубликована: Апрель 6, 2023
Morphology
control
greatly
influences
the
power
conversion
efficiency
(PCE)
and
long-term
stability
of
all-polymer
solar
cells
(all-PSCs);
however,
it
remains
challenging
owing
to
their
complex
crystallization
behavior.
Herein,
a
small
amount
Y6
(2
wt%)
is
introduced
as
solid
additive
into
PM6:PY-DT
blend.
remained
inside
active
layer
interacted
with
PY-DT
form
well-mixed
phase.
Increased
molecular
packing,
enlarged
phase
separation
size,
decreased
trap
density
are
observed
for
Y6-processed
The
corresponding
devices
showed
simultaneously
improved
short-circuit
current
fill
factor,
achieving
high
PCE
over
18%
excellent
stability,
T80
lifetime
1180
h
an
extrapolated
T70
9185
at
maximum
point
tracking
(MPP)
conditions
under
continuous
one-sun
illumination.
This
Y6-assisted
strategy
successfully
applied
other
blends,
demonstrating
its
universality
all-PSCs.
work
paves
new
way
fabrication
all-PSCs
superior
stability.
Advanced Materials,
Год журнала:
2022,
Номер
34(20)
Опубликована: Март 15, 2022
All-polymer
solar
cells
(all-PSCs)
have
drawn
growing
attention
and
achieved
tremendous
progress
recently,
but
their
power
conversion
efficiency
(PCE)
still
lags
behind
small-molecule-acceptor
(SMA)-based
PSCs
due
to
the
relative
difficulty
on
morphology
control
of
polymer
photoactive
blends.
Here,
low-cost
PTQ10
is
introduced
as
a
second
donor
(a
third
component)
into
PM6:PY-IT
blend
finely
tune
energy-level
matching
microscopic
layer.
The
addition
decreases
π-π
stacking
distance,
increases
coherence
length
ordered
face-on
molecular
packing
orientation,
which
improves
charge
separation
transport
in
Moreover,
deeper
highest
occupied
orbital
energy
level
than
PM6
leads
higher
open-circuit
voltage
ternary
all-PSCs.
As
result,
PCE
16.52%
for
all-PSCs,
one
PCEs
In
addition,
devices
exhibit
high
tolerance
layer
thickness
with
15.27%
13.91%
at
≈205
≈306
nm,
respectively,
are
so
far
all-PSCs
thick
Advanced Materials,
Год журнала:
2022,
Номер
34(29)
Опубликована: Май 23, 2022
Asymmetric
substitution
of
end-groups
is
first
applied
in
molecular
donors.
Three
commonly
used
2-ethylhexyl
cyanoacetate
(CA),
rhodanine
(Reh),
and
1H-indene-1,3(2H)-dione
(ID)
are
combined
to
construct
a
series
symmetric
asymmetric
Correspondingly,
the
donors
SM-CA-Reh
SM-CA-ID
show
largely
increased
dipole
moments
(2.14
3.39
D,
respectively)
enhanced
aggregation
propensity,
as
compared
those
SM-CA,
SM-Reh,
SM-ID.
Using
N3
acceptor,
interestingly,
integrates
photovoltaic
characteristics
high
fill
factor
(FF)
for
SM-CA
short-circuit
current
density
delivers
record
power
conversion
efficiency
(PCE)
16.34%
with
FF
77.5%,
which
much
higher
than
15.41%
14.76%
SM-Reh.
However,
SM-ID
give
lower
PCE
8.20%
2.76%.
Characterization
results
suggest
that
π-π
interaction
mainly
dictates
packing
morphology
blend
films
instead
effect
or
crystallinity.
Mono-substitution
Reh
facilitates
demixing
appropriately
but
keeps
characteristic
fine
bicontinuous
network
SM-CA:N3.
SM-CA-Reh:N3
shows
more
efficient
exciton
extraction,
hole
transport,
better
miscibility.
These
well
explain
merits
integration
improved
performance.
Journal of Materials Chemistry A,
Год журнала:
2022,
Номер
10(12), С. 6291 - 6329
Опубликована: Янв. 1, 2022
This
review
systematically
summarizes
the
development
of
all-small-molecule
organic
photovoltaics
(SMPVs)
from
molecule
engineering
and
device
aspects,
highlights
challenges
perspectives
further
developing
SMPVs.
Advanced Materials,
Год журнала:
2023,
Номер
36(4)
Опубликована: Ноя. 23, 2023
Abstract
Three
nonfused
ring
electron
acceptors
(NFREAs),
namely,
3TT‐C2‐F
,
3TT‐C2‐Cl
and
3TT‐C2
are
purposefully
designed
synthesized
with
the
concept
of
halogenation.
The
incorporation
F
or/and
Cl
atoms
into
molecular
structure
(
)
enhances
π–π
stacking,
improves
mobility,
regulates
nanofiber
morphology
blend
films,
thus
facilitating
exciton
dissociation
charge
transport.
In
particular,
films
based
on
D18:
demonstrate
a
high
an
extended
diffusion
distance,
well‐formed
network.
These
factors
contribute
to
devices
remarkable
power
conversion
efficiency
17.19%,
surpassing
that
(16.17%)
(15.42%).
To
best
knowledge,
this
represents
highest
achieved
in
NFREA‐based
up
now.
results
highlight
potential
halogenation
NFREAs
as
promising
approach
enhance
performance
organic
solar
cells.
Advanced Materials,
Год журнала:
2023,
Номер
35(28)
Опубликована: Апрель 6, 2023
Morphology
control
greatly
influences
the
power
conversion
efficiency
(PCE)
and
long-term
stability
of
all-polymer
solar
cells
(all-PSCs);
however,
it
remains
challenging
owing
to
their
complex
crystallization
behavior.
Herein,
a
small
amount
Y6
(2
wt%)
is
introduced
as
solid
additive
into
PM6:PY-DT
blend.
remained
inside
active
layer
interacted
with
PY-DT
form
well-mixed
phase.
Increased
molecular
packing,
enlarged
phase
separation
size,
decreased
trap
density
are
observed
for
Y6-processed
The
corresponding
devices
showed
simultaneously
improved
short-circuit
current
fill
factor,
achieving
high
PCE
over
18%
excellent
stability,
T80
lifetime
1180
h
an
extrapolated
T70
9185
at
maximum
point
tracking
(MPP)
conditions
under
continuous
one-sun
illumination.
This
Y6-assisted
strategy
successfully
applied
other
blends,
demonstrating
its
universality
all-PSCs.
work
paves
new
way
fabrication
all-PSCs
superior
stability.
