Advanced Functional Materials,
Год журнала:
2024,
Номер
34(19)
Опубликована: Янв. 14, 2024
Abstract
As
simple
and
versatile
tools,
additives
have
been
widely
used
to
refine
active
layer
morphology
played
a
crucial
role
in
boosting
the
power
conversion
efficiency
(PCE)
of
organic
solar
cells
(OSCs).
Herein,
three
novel
solvent
named
Th‐FSi,
Th‐ClSi,
Th‐BrSi
with
same
backbone
2,5‐bis(trimethylsilyl)thiophene
are
designed
synthesized
by
substituting
different
halogens
fluorine,
chlorine,
bromine,
respectively.
Notably,
Th‐ClSi
exhibits
more
significant
dipole
moment
engages
non‐covalent
interactions
small‐molecule
acceptor
(SMA)
L8‐BO,
which
slight
adjustments
intermolecular
interaction,
crystallinity,
molecular
packing
PM6:L8‐BO
layer.
Consequently,
OSCs
incorporating
outperform
their
Th‐FSi
counterparts
photo‐capturing,
reduced
energy
loss,
superior
exciton
dissociation,
charge
transfer
properties,
out‐coming
yields
an
enhanced
PCE
18.29%.
Moreover,
integrating
near‐infrared
absorbing
SMA
(BTP‐eC9)
guest
into
matrix,
absorption
spectrum
span
880–930
nm,
resultant
ternary
achieve
commendable
19.17%,
ranking
among
highest
efficiencies
reported
date
is
expanded.
These
findings
underscore
promise
halogenated
thiophene‐based
as
potent
avenue
for
morphological
fine‐tuning
consequent
enhancement
OSCs.
Advanced Materials,
Год журнала:
2023,
Номер
35(32)
Опубликована: Май 27, 2023
The
π-expansion
of
non-fullerene
acceptors
is
a
promising
method
for
boosting
the
organic
photovoltaic
performance
by
allowing
fine-tuning
electronic
structures
and
molecular
packing.
In
this
work,
highly
efficient
solar
cells
(OSCs)
are
fabricated
using
2D
strategy
to
design
new
acceptors.
Compared
with
quinoxaline-fused
cores
AQx-16,
π-expanded
phenazine-fused
AQx-18
induce
more
ordered
compact
packing
between
adjacent
molecules,
affording
an
optimized
morphology
rational
phase
separation
in
blend
film.
This
facilitates
exciton
dissociation
inhibited
charge
recombination.
Consequently,
power
conversion
efficiency
(PCE)
18.2%
simultaneously
increasing
Voc
,
Jsc
fill
factor
achieved
AQx-18-based
binary
OSCs.
Significantly,
ternary
devices
via
two-in-one
alloy
acceptor
exhibit
superior
PCE
19.1%,
one
highest
values
ever
reported
OSCs,
along
high
0.928
V.
These
results
indicate
importance
delicate
regulation
crystalline
behaviors
achieve
performance,
aimed
at
significantly
promoting
further
development
Advanced Energy Materials,
Год журнала:
2023,
Номер
13(25)
Опубликована: Май 24, 2023
Abstract
Additive
engineering
can
precisely
regulate
the
bulk‐heterojunction
active
layer
morphology
with
ideal
domain
size
and
purity,
playing
a
critical
role
in
development
of
organic
solar
cells
(OSCs).
Herein,
two
solid
additives,
1,4‐dichlorobenzene
(DCB)
1‐chloro‐4‐iodobenzene
(CIB),
low
melting
point
(mp.)
≈52
°C,
are
investigated
comprehensively
comparison
to
1,4‐diiodobenzene
(DIB,
mp.
131
°C).
After
spin‐coating,
DIB
residue
is
found
as‐cast
PM6:BTP‐eC9
based
blend
film,
whereas
DCB
CIB
completely
removed
during
showing
situ
removable
properties
that
enable
convenient
processing.
In
OSCs,
DCB‐
CIB‐processed
layers
afford
power‐conversion
efficiencies
(PCEs)
18.2%
18.4%,
respectively,
all
higher
than
17.8%
for
DIB.
Among
three
most
effective
enhancements
absorption
coefficients
donor
acceptor,
affording
fast
more
balanced
carrier
transports,
suppressing
recombination.
Of
particular
note,
provide
some
universality
as
an
additive,
on
its
elevations
PCEs
several
binary
PM6:D18‐Cl:L8‐BO
ternary
layers.
Impressively,
prominent
PCE
19.1%
remarkable
fill
factor
81.1%
achieved
layer.
This
work
demonstrates
potential
additive
high‐efficiency
OSCs.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Окт. 9, 2023
Conjugated
polymers
are
generally
featured
with
low
structural
order
due
to
their
aromatic
and
irregular
units,
which
limits
light
absorption
charge
mobility
in
organic
solar
cells.
In
this
work,
we
report
a
conjugated
molecule
INMB-F
that
can
act
as
molecular
bridge
via
electrostatic
force
enhance
the
intermolecular
stacking
of
BDT-based
polymer
donors
toward
efficient
stable
Molecular
dynamics
simulations
synchrotron
X-ray
measurements
reveal
electronegative
adsorb
on
electropositive
main
chain
increase
donor-donor
interactions,
leading
enhanced
shortened
π-π
distance
consequently
transport
ability.
Casting
non-fullerene
acceptor
layer
top
modified
donor
fabricate
cells
layer-by-layer
deposition
evidences
significant
power
conversion
efficiency
boosts
range
photovoltaic
systems.
A
19.4%
(certified
18.96%)
is
realized
PM6/L8-BO
binary
devices,
one
highest
reported
efficiencies
material
system.
The
by
also
leads
six-fold
enhancement
operational
stability
ACS Energy Letters,
Год журнала:
2023,
Номер
8(2), С. 1058 - 1067
Опубликована: Янв. 23, 2023
Herein,
an
emerging
acceptor
L8-BO
as
the
third
component
was
combined
with
B1:BO-4Cl
system
for
constructing
efficient
ternary
all-small-molecule
organic
solar
cells
(ASM-OSCs).
Theoretical,
morphological,
and
crystallographic
studies
reveal
that
BO-4Cl
possess
good
compatibility,
resulting
in
alloy-like
state
formation
of
two
acceptors
blends.
The
synergistic
effect
is
conducive
to
forming
favorable
phase
separation
molecular
stacking
promoting
charge
splitting
extraction,
which
contributes
simultaneously
boosting
short-circuit
current
density
fill
factor.
Furthermore,
higher
lowest
unoccupied
orbital
energy
level
assist
ASM-OSCs
achieving
lower
voltage
loss
respect
binary
devices.
optimal
20
wt
%
deliver
a
top-level
efficiency
17.10%.
This
work
demonstrates
not
only
morphology
but
also
small
matrix
can
be
well-manipulated
by
employing
strategy.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Май 22, 2023
With
the
power
conversion
efficiency
of
binary
polymer
solar
cells
dramatically
improved,
thermal
stability
small-molecule
acceptors
raised
main
concerns
on
device
operating
stability.
Here,
to
address
this
issue,
thiophene-dicarboxylate
spacer
tethered
are
designed,
and
their
molecular
geometries
further
regulated
via
thiophene-core
isomerism
engineering,
affording
dimeric
TDY-α
with
a
2,
5-substitution
TDY-β
3,
4-substitution
core.
It
shows
that
processes
higher
glass
transition
temperature,
better
crystallinity
relative
its
individual
acceptor
segment
isomeric
counterpart
TDY-β,
more
stable
morphology
donor.
As
result,
based
delivers
18.1%,
most
important,
achieves
an
extrapolated
lifetime
about
35000
hours
retaining
80%
initial
efficiency.
Our
result
suggests
proper
geometry
design,
can
achieve
both
high
Chemical Society Reviews,
Год журнала:
2023,
Номер
52(2), С. 454 - 472
Опубликована: Янв. 1, 2023
We
describe
the
role
of
non-covalent
intermolecular
interactions
in
design
π-conjugated
functional
materials.
highlight
opto-electronic
applications
these
materials
related
to
their
structural
and
photophysical
properties.
Energy & Environmental Science,
Год журнала:
2023,
Номер
16(6), С. 2637 - 2645
Опубликована: Янв. 1, 2023
A
new
morphology
regulation
approach
using
solid
additive,
1,3,5-trimethoxybenzene,
can
restrict
energetic
disorder
and
optimize
the
nanoscale
of
organic
solar
cells,
achieves
a
high
power
conversion
efficiency
19.30%.
Advanced Materials,
Год журнала:
2022,
Номер
35(8)
Опубликована: Дек. 3, 2022
Although
all-polymer
solar
cells
(all-PSCs)
show
great
commercialization
prospects,
their
power
conversion
efficiencies
(PCEs)
still
fall
behind
small
molecule
acceptor-based
counterparts.
In
blends,
the
optimized
morphology
and
high
molecular
ordering
are
difficult
to
achieve
since
there
is
troublesome
competition
between
crystallinity
of
polymer
donor
acceptor
during
film-formation
process.
Therefore,
it
challenging
improve
performance
all-PSCs.
Herein,
a
ternary
strategy
adopted
modulate
an
blend,
in
which
PM6:PY-82
selected
as
host
blend
PY-DT
employed
guest
component.
Benefiting
from
favorable
miscibility
two
acceptors
higher
regularity
PY-DT,
matrix
features
well-defined
fibrillar
improved
ordering.
Consequently,
champion
PM6:PY-82:PY-DT
device
produces
record-high
PCE
18.03%,
with
simultaneously
open-circuit
voltage,
short-circuit
current
fill
factor
comparison
binary
devices.
High-performance
large-area
(1
cm2
)
thick-film
(300
nm)
all-PSCs
also
successfully
fabricated
PCEs
16.35%
15.70%,
respectively.Moreover,
16.5
organic
module
affords
encouraging
13.84%
when
using
non-halogenated
solvent
,
showing
potential
"Lab-to-Fab"
transition
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(14)
Опубликована: Янв. 22, 2023
Abstract
With
the
emergence
of
ADA'DA‐type
(Y‐series)
non‐fullerene
acceptors
(NFAs),
power
conversion
efficiencies
(PCEs)
organic
photovoltaic
devices
have
been
constantly
refreshed
and
gradually
reached
20%
in
recent
years
(19%
for
single
junction
tandem
device).
The
possess
specific
design
concept,
which
greatly
enrich
NFA
types
excellent
compatibility
with
many
donor
materials.
It
is
gratifying
to
note
that
previously
underperforming
materials
combine
these
regulated
shine
again.
Nowadays,
concept
modular
widely
used
research
donors,
injecting
new
vitality
into
field
photovoltaics.
Furthermore,
also
promote
multicomponent
devices,
bilayer
processing
solvent
engineering,
additive
engineering.
Herein,
latest
progresses
polymer
solar
cells
efficiency
over
17%
are
briefly
reviewed
from
aspects
active
material
design,
interface
development,
device
technology.
At
last,
opportunities
challenges
commercialization
future
discussed.