Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 3, 2024
Abstract
By
selectively
interacting
with
acceptor
components,
various
typed
solid
additives
achieve
boosted
power
conversion
efficiency
(PCE)
in
organic
solar
cells
(OSCs).
However,
due
to
the
efficient
active
layer
being
composed
of
donor
and
materials,
it
is
difficult
obtain
desired
morphology
by
manipulating
component
alone,
limiting
further
improvement
PCEs.
Herein,
two
a
same
backbone
thiophene‐benzene‐thiophene
(halogen‐free
D1‐H)
but
different
halogen
substituents
(fluorinated
D1‐F
chlorinated
D1‐Cl)
are
developed
probe
working
mechanism
halogenated
variation
OSCs.
Unlike
D1‐H
continuous
charge
distributions,
D1‐Cl
show
isolated
positive
distribution
benzene‐core
negative
thiophene,
offering
stronger
non‐covalent
interactions
both
(PM6)
(L8‐BO),
especially
D1‐Cl.
Consequently,
D1‐Cl‐treated
obtains
an
optimized
phase
separation
improved
molecular
packing,
boosting
PCE
18.59%
device
stability
OSCs,
17.62%
for
D1‐H‐treated
counterparts.
Moreover,
using
D18:L8‐BO
D18:BTP‐eC9
as
layers,
binary
OSCs
impressive
PCEs
19.29%
19.39%,
respectively.
This
work
indicates
that
halogenation
engineering
can
effectively
regulate
improving
elucidates
underlying
mechanism.
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(5), P. 1916 - 1930
Published: Jan. 1, 2024
The
addition
of
cyclane
1,5-diiodocycloctane
(DICO)
provides
critical
roles
in
extending
exciton
diffusion
length
within
active
layer,
consequently
contributing
to
the
improvement
power
conversion.
efficiency
thick
film
organic
solar
cells.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(40)
Published: Aug. 16, 2023
Abstract
Fine‐tuning
the
thermodynamic
self‐assembly
of
molecules
via
volatile
solid
additives
has
emerged
to
be
an
effective
way
construct
high‐performance
organic
solar
cells.
Here,
three‐dimensional
structured
have
been
designed
and
applied
facilitate
formation
organized
molecular
assembly
in
active
layer.
By
means
systematic
theory
analyses
film‐morphology
characterizations
based
on
four
candidates,
we
preselected
optimal
one,
4‐fluoro‐
N,N
‐diphenylaniline
(FPA),
which
possesses
good
volatility
strong
charge
polarization.
The
solids
can
induce
packing
layers
intermolecular
interactions
subsequently
provide
sufficient
space
for
self‐reassembly
during
transition
process.
Benefitting
from
optimized
morphology
with
improved
transport
reduced
energy
disorder
FPA‐processed
devices,
high
efficiencies
over
19
%
were
achieved.
strategy
inducing
ordered
structure
represents
a
practical
approach
rational
control
highly
efficient
contributing
deeper
insights
into
structural
design
additives.
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(10), P. 3365 - 3374
Published: Jan. 1, 2024
A
strong
electron-deficient
unit
CNPz
as
a
solid
additive
was
developed
in
PTQ10/
m
-BTP-PhC6
binary
organic
solar
cells.
high
PCE
of
19.67%
achieved
with
significant
increase
the
J
SC
and
FF
(81.8%).
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(23)
Published: April 3, 2024
Abstract
In
this
study,
a
novel
wide‐bandgap
small
molecule
guest
material,
ITOA,
designed
and
synthesized
for
fabricating
efficient
ternary
organic
solar
cells
(OSCs)
ITOA
complements
the
absorbance
of
PM6:Y6
binary
system,
exhibiting
strong
crystallinity
modest
miscibility.
optimizes
morphology
by
promoting
intensive
molecular
packing,
reducing
domain
size,
establishing
preferred
vertical
phase
distribution.
These
features
contribute
to
improved
well‐balanced
charge
transport,
suppressed
carrier
recombination,
exciton
dissociation.
Consequently,
significantly
enhanced
efficiency
18.62%
device
is
achieved,
accompanied
increased
short‐circuit
current
density
(
J
SC
),
fill
factor
(FF),
open‐circuit
voltage
V
OC
).
Building
on
success,
replacing
Y6
with
BTP‐eC9
leads
an
outstanding
PCE
19.33%
OSCs.
Notably,
introduction
expedites
formation
optimized
morphology,
resulting
in
impressive
18.04%
without
any
postprocessing.
Moreover,
exhibits
operational
stability
under
maximum
power
point
(MPP)
tracking.
This
comprehensive
study
demonstrates
that
rationally
can
optimize
reduce
energy
loss,
streamline
fabrication
process,
essential
achieving
high
OSCs,
paving
way
practical
commercial
applications.
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(12), P. 4216 - 4227
Published: Jan. 1, 2024
Pincer-shaped
non-covalent
bond
interactions
are
introduced
between
a
small-molecule
additive
and
polymer
acceptor,
effectively
improving
the
photovoltaic
performance
mechanical
stability
of
all-polymer
solar
cells.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Oct. 15, 2024
The
high
non-radiative
energy
loss
is
a
bottleneck
issue
that
impedes
the
improvement
of
organic
solar
cells.
formation
triplet
exciton
thought
to
be
main
source
large
loss.
Decreasing
rate
back
charge
transfer
considered
as
an
effective
approach
alleviate
relaxation
charge-transfer
state
and
generation.
Herein,
we
develops
efficient
ternary
system
based
on
D18:N3-BO:F-BTA3
by
regulating
disorder
blend.
With
addition
F-BTA3,
well-defined
morphology
with
more
condensed
molecular
packing
obtained.
Moreover,
reduced
demonstrated
in
blend,
which
decreases
well
formation,
therefore
hinders
recombination
pathways.
Consequently,
D18:N3-BO:F-BTA3-based
device
produces
low
0.183
eV
record-high
efficiency
20.25%.
This
work
not
only
points
towards
significant
role
suppression
loss,
but
also
provides
valuable
insight
for
enhancing
performance
OSCs.
Here,
authors
regulate
through
system,
achieving
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(9)
Published: Jan. 11, 2024
Iodination
has
unlocked
new
potentials
in
organic
photovoltaics
(OPVs).
A
newly
designed
and
synthesized
iodinated
non-fullerene
acceptor,
BO-4I,
showcases
exceptional
excitation
delocalization
property
with
the
exciton
diffusion
length
increased
to
80
nm.
The
enhanced
electron
is
attributed
larger
atomic
radius
orbit
of
iodine
atom,
which
facilitates
formation
intra-moiety
excitations
acceptor
phase.
This
effectively
circumvents
charge
transfer
state-related
recombination
mechanisms,
leading
a
substantial
reduction
non-radiative
energy
loss
(ΔE
