Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Март 2, 2024
Abstract
All-small-molecule
organic
solar
cells
with
good
batch-to-batch
reproducibility
combined
non-halogen
solvent
processing
show
great
potential
for
commercialization.
However,
of
all-small-molecule
are
rarely
reported
and
its
power
conversion
efficiencies
very
difficult
to
improve.
Herein,
we
designed
synthesized
a
small
molecule
donor
BM-ClEH
that
can
take
advantage
strong
aggregation
property
induced
by
intramolecular
chlorine-sulfur
non-covalent
interaction
improve
molecular
pre-aggregation
in
tetrahydrofuran
corresponding
micromorphology
after
film
formation.
Tetrahydrofuran-fabricated
based
on
BM-ClEH:BO-4Cl
achieved
high
15.0%
binary
device
16.1%
ternary
under
thermal
annealing
treatment.
In
contrast,
weakly
aggregated
BM-HEH
without
bond
is
almost
inefficient
same
conditions
due
poor
disordered
π-π
stacking,
indistinct
phase
separation
exciton
dissociation.
This
work
promotes
the
development
provides
further
guidance.
Advanced Materials,
Год журнала:
2024,
Номер
36(25)
Опубликована: Март 21, 2024
Interfacial
layers
(ILs)
are
prerequisites
to
form
the
selective
charge
transport
for
high-performance
organic
photovoltaics
(OPVs)
but
mostly
result
in
considerable
parasitic
absorption
loss.
Trimming
ILs
down
a
mono-molecular
level
via
self-assembled
monolayer
is
an
effective
strategy
mitigate
However,
such
suffers
from
inferior
electrical
contact
with
low
surface
coverage
on
rough
surfaces
and
poor
producibility.
To
address
these
issues,
here,
interlayer
(SAI)
developed,
which
involves
thin
layer
of
2-6
nm
full
substrate
both
covalent
van
der
Waals
bonds
by
using
molecule
2-(9H-carbazol-9-yl)
(2PACz).
Via
facile
spin
coating
without
further
rinsing
annealing
process,
it
not
only
optimizes
optical
properties
OPVs,
enables
world-record
efficiency
20.17%
(19.79%
certified)
also
simplifies
tedious
processing
procedure.
Moreover,
SAI
especially
useful
improving
absorbing
selectivity
semi-transparent
record
light
utilization
5.34%.
This
work
provides
optimize
OPVs
solar
window
applications.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Авг. 10, 2024
The
nanoscale
fibrillar
morphology,
featuring
long-range
structural
order,
provides
abundant
interfaces
for
efficient
exciton
dissociation
and
high-quality
pathways
effective
charge
transport,
is
a
promising
morphology
high
performance
organic
solar
cells.
Here,
we
synthesize
thiophene
terminated
non-fullerene
acceptor,
L8-ThCl,
to
induce
the
fibrillization
of
both
polymer
donor
host
that
surpasses
20%
efficiency
milestone
After
adding
original
weak
less
continuous
nanofibrils
donors,
i.e.
PM6
or
D18,
are
well
enlarged
refined,
whilst
acceptor
L8-BO
also
assembles
into
with
enhanced
order.
By
adapting
layer-by-layer
deposition
method,
order
can
be
retained
significantly
boost
power
conversion
efficiency,
specific
values
19.4%
20.1%
PM6:L8-ThCl/L8-BO:L8-ThCl
D18:L8-ThCl/L8-BO:L8-ThCl
devices,
latter
being
certified
20.0%,
which
highest
reported
so
far
single-junction
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Авг. 5, 2023
Abstract
Given
that
bromine
possesses
similar
properties
but
extra
merits
of
easily
synthesizing
and
polarizing
comparing
to
homomorphic
fluorine
chlorine,
it
is
quite
surprising
very
rare
high-performance
brominated
small
molecule
acceptors
have
been
reported.
This
may
be
caused
by
undesirable
film
morphologies
stemming
from
relatively
larger
steric
hindrance
excessive
crystallinity
bromides.
To
maximize
the
advantages
bromides
while
circumventing
weaknesses,
three
(CH20,
CH21
CH22)
are
constructed
with
stepwise
brominating
on
central
units
rather
than
conventional
end
groups,
thus
enhancing
intermolecular
packing,
dielectric
constant
them
without
damaging
favorable
packing
through
groups.
Consequently,
PM6:CH22-based
binary
organic
solar
cells
render
highest
efficiency
19.06%
for
acceptors,
more
excitingly,
a
record-breaking
15.70%
when
further
thickening
active
layers
~500
nm.
By
exhibiting
such
acceptor,
our
work
highlights
great
potential
achieving
delicately
brominating.
Advanced Materials,
Год журнала:
2024,
Номер
36(33)
Опубликована: Июнь 20, 2024
Organic
solar
cells,
as
a
cutting-edge
sustainable
renewable
energy
technology,
possess
myriad
of
potential
applications,
while
the
bottleneck
problem
less
than
20%
efficiency
limits
further
development.
Simultaneously
achieving
an
ordered
molecular
arrangement,
appropriate
crystalline
domain
size,
and
reduced
nonradiative
recombination
poses
significant
challenge
is
pivotal
for
overcoming
limitations.
This
study
employs
dual
strategy
involving
development
novel
acceptor
ternary
blending
to
address
this
challenge.
A
non-fullerene
acceptor,
SMA,
characterized
by
highly
arrangement
high
lowest
unoccupied
orbital
level,
synthesized.
By
incorporating
SMA
guest
in
PM6:BTP-eC9
system,
it
observed
that
staggered
liquid-solid
transition
donor
facilitating
crystallization
ordering
maintaining
suitable
size.
Furthermore,
optimized
vertical
morphology
bimolecular
recombination.
As
result,
device
achieved
champion
20.22%,
accompanied
increased
voltage,
short-circuit
current
density,
fill
factor.
Notably,
stabilized
18.42%
attained
flexible
devices.
underscores
synergistic
approach
integrating
material
innovation
techniques
optimizing
bulk
heterojunction
photovoltaic
performance.
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
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(22)
Опубликована: Март 25, 2024
The
development
of
high-efficiency
organic
solar
cells
(OSCs)
processed
from
non-halogenated
solvents
is
crucially
important
for
their
scale-up
industry
production.
However,
owing
to
the
difficulty
regulating
molecular
aggregation,
there
a
huge
efficiency
gap
between
and
halogenated
solvent
OSCs.
Herein,
we
fabricate
o-xylene
OSCs
with
approaching
20
%
by
incorporating
trimeric
guest
acceptor
named
Tri-V
into
PM6:L8-BO-X
host
blend.
incorporation
effectively
restricts
excessive
aggregation
L8-BO-X,
regulates
packing
optimizes
phase-separation
morphology,
which
leads
mitigated
trap
density
states,
reduced
energy
loss
suppressed
charge
recombination.
Consequently,
PM6:L8-BO-X:Tri-V-based
device
achieves
an
19.82
%,
representing
highest
solvent-processed
reported
date.
Noticeably,
addition
Tri-V,
ternary
shows
improved
photostability
than
binary
PM6:L8-BO-X-based
device,
maintains
80
initial
after
continuous
illumination
1380
h.
This
work
provides
feasible
approach
fabricating
high-efficiency,
stable,
eco-friendly
OSCs,
sheds
new
light
on
large-scale
industrial
production
