Conjugated π-Extension of Small Molecular Nonfullerene Acceptor for Efficient Ternary Organic Solar Cells with an Efficiency of 19.10%
Energy & Fuels,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 14, 2025
In
this
study,
we
have
successfully
incorporated
a
small
molecular
acceptor,
Y-LC,
with
conjugated
π-extension
as
secondary
acceptor
in
the
PM6:BTP-eC9-based
organic
photovoltaics.
The
performance
of
device
was
significantly
promoted
from
18.45%
binary
system
PM6:BTP-eC9
to
over
19%
ternary
minimal
Y-LC
loading.
This
enhancement
can
be
attributed
alloy-like
structures
acceptors
and
optimized
active
layer
morphology,
which
leads
improved
hole
electron
mobilities,
thereby
suppressing
charge
recombination,
finally
resulting
higher
photocurrent
solar
cells.
Furthermore,
complementary
absorption
is
observed
PM6
BTP-eC9,
broaden
spectrum
photoactive
enable
more
photons
sunlight
absorbed.
Additionally,
facilitates
efficient
transfer
donor
by
forming
cascade
energy
levels
between
BTP-eC9.
These
advantages
collectively
contribute
superior
obtained
work
also
highlights
that
adoption
nonfullerene
suitable
π-extensions
minor
additive
photovoltaics
powerful
approach
for
achieving
state-of-the-art
Язык: Английский
Tailoring small-molecule acceptors through asymmetric side-chain substitution for efficient organic solar cells
Lan Xie,
Dingding Qiu,
Xianghao Zeng
и другие.
Science China Materials,
Год журнала:
2025,
Номер
68(3), С. 860 - 867
Опубликована: Фев. 13, 2025
Язык: Английский
Medium‐Bandgap Acceptors for Efficient Ternary Organic Solar Cells Achieved by End‐Group Engineering
Solar RRL,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 18, 2025
The
ternary
strategy
has
been
evidenced
as
one
of
the
most
crucial
methods
to
improve
photovoltaic
performance
organic
solar
cells.
However,
selection
and
design
third
components
are
decisive
factors
facilitating
progress
cells
(TOSCs).
In
this
study,
focuses
concentrated
on
D18‐Cl:N3
binary
host
device
by
developing
a
weakly
electron‐withdrawing
end
group
synthesizing
guest
acceptor,
BTP‐CM,
which
holds
similar
backbone
N3.
structure
resemblance
ensures
good
compatibility
molecule
with
N3,
improves
charge
transport
reduces
recombination.
Thereby,
D18‐Cl:N3:BTP‐CM‐based
TOSC
exhibits
an
improved
power
conversion
efficiency
18.32%,
compared
17.13%
device.
This
work
provides
effective
for
acceptors,
aims
introduce
new
groups
obtain
molecules
complementary
absorptions
matched
energy
levels
while
preserving
molecular
acceptor.
Язык: Английский
Trifluoroacetic Acid‐Induced Adsorption Dipole Modulation of Perylene Diimide Dipole Moment Enables 19.5% Efficiency in Binary Organic Solar Cells
Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 19, 2025
Abstract
Perylene
diimides
(PDIs)
have
emerged
as
promising
materials
for
cathode
interfacial
layers
(CILs)
in
organic
solar
cells
(OSCs)
due
to
their
advantageous
energy
level
alignment
with
active
layer
and
insensitivity
film
thickness,
enabling
the
easy
fabrication
of
efficient
large‐area
devices.
However,
inherent
low
dipole
moment
PDIs
results
suboptimal
charge
transport
properties,
limiting
device
performance.
Herein,
a
new
strategy
by
incorporating
trifluoroacetic
acid
(TFA)
into
PDI
material
fabricate
compound
large
number
moments
is
introduced.
Density
functional
theory
calculations
reveal
that
highly
electronegative
F
groups
attract
ammonium
end
PDIN
significantly
increase
from
0.3
2.6
Debye,
enhancing
transfer
OSCs.
By
optimizing
TFA
concentration
2%
using
CILs,
champion
efficiencies
18.0%
19.5%
are
achieved
state‐of‐the‐art
binary
comprising
PM6:Y6
PM6:L8‐BO
(Layer‐by‐Layer),
respectively.
Notably,
these
devices
maintain
88.3%
initial
efficiency
after
240
h,
demonstrating
exceptional
operational
stability.
The
work
shows
F‐induced
adsorbed
not
only
provides
mechanism
design
but
also
paves
way
achieving
high‐efficiency
stable
Язык: Английский
Fabricating High‐Performance Organic Solar Cells by Using Inside‐Chain Chlorinated Acceptor as a Ternary Component
Small,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 19, 2025
Abstract
In
this
study,
two
molecules,
WLA1
and
WLA2,
with
the
same
molecular
backbone
but
different
degrees
of
inside‐chain
chlorination,
are
designed
synthesized
to
elucidate
effects
chlorine
substitution
strategies
on
morphology
small‐molecule
acceptors
blended
films.
The
chlorinated
WLA2
enhances
crystallinity
stacking.
For
binary
organic
solar
cells
(OSCs),
corresponding
films
exhibit
suitable
phase
separation
crystallinity.
Therefore,
WLA2‐based
OSCs
achieve
a
power
conversion
efficiency
(PCE)
16.80%,
which
is
higher
than
that
WLA1‐based
(16.21%).
ternary
blending
strategy,
incorporated
into
D18:L8‐BO
system
as
third
component,
introduction
acceptor
further
improves
facilitates
induction
fiber
formation.
have
significantly
exciton
diffusion
charge
transport
efficiencies
compared
L8‐BO
WLA1.
PCE
19.64%.
This
study
emphasizes
great
potential
combining
an
molecule
strategy
prepare
high‐performance
OSCs.
Язык: Английский