Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 16, 2025
Abstract
Boosting
power
conversion
efficiency
(PCE)
of
organic
solar
cells
(OSCs)
has
been
restricted
by
its
undesirably
high
energy
loss,
especially
for
those
nonhalogenated
solvent‐processed
ones.
Here,a
dichloro‐methoxylated
terminal
group
in
an
asymmetric
small
molecular
acceptor
design,
which
realizes
a
significantly
reduced
non‐radiative
loss
(0.179
eV)
compared
to
symmetric
counterpart
(0.202
eV),
is
reported.
Consequently,
the
device
improved
up
20%
PM6:BTP‐eC9‐4ClO,
without
sacrificing
photon
harvest
or
charge
transport
ability
control
system
PM6:BTP‐eC9.
Further
characterizations
reveal
BTP‐eC9‐4ClO's
blend
film
demonstrates
suppressed
triplet
state
formation,
enabled
enhanced
electron
delocalization.
In
addition,
BTP‐eC9‐4ClO
found
be
thermally
stabler
than
BTP‐eC9,
and
thus
providing
stability,
whose
T80
value
reaches
>
7800
h
under
80
°C
anneal
N
2
via
linear
extrapolation.
This
work
represents
state‐of‐the‐art
performance
binary
OSCs
with
certified
results
(19.45%).
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(36)
Опубликована: Июль 18, 2023
Achieving
both
high
open-circuit
voltage
(Voc
)
and
short-circuit
current
density
(Jsc
to
boost
power-conversion
efficiency
(PCE)
is
a
major
challenge
for
organic
solar
cells
(OSCs),
wherein
energy
loss
(Eloss
inefficient
charge
transfer
usually
take
place.
Here,
three
new
Y-series
acceptors
of
mono-asymmetric
asy-YC11
dual-asymmetric
bi-asy-YC9
bi-asy-YC12
are
developed.
They
share
the
same
asymmetric
D1
AD2
(D1
=thieno[3,2-b]thiophene
D2
=selenopheno[3,2-b]thiophene)
fused-core
but
have
different
unidirectional
sidechain
on
side,
allowing
fine-tuned
molecular
properties,
such
as
intermolecular
interaction,
packing
pattern,
crystallinity.
Among
binary
blends,
PM6
:
one
has
better
morphology
with
appropriate
phase
separation
higher
order
than
asy-YC9
bi-asy-YC11
ones.
Therefore,
bi-asy-YC12-based
OSCs
offer
PCE
17.16
%
Voc
Jsc
,
due
reduced
Eloss
efficient
properties.
Inspired
by
strong
NIR-absorption,
introduced
into
L8-BO
construct
ternary
OSCs.
Thanks
broadened
absorption,
optimized
morphology,
furtherly
minimized
achieve
champion
19.23
%,
which
highest
efficiencies
among
these
annealing-free
devices.
Our
developed
engineering
constructing
bi-asymmetric
provides
an
approach
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 Functional Materials,
Год журнала:
2024,
Номер
34(16)
Опубликована: Янв. 2, 2024
Abstract
The
layer‐by‐layer
(LbL)
organic
photovoltaics
(OPVs)
are
constructed
with
wide‐bandgap
donor
PM1
and
narrow‐bandgap
acceptor
L8‐BO.
exciton
utilization
near
cathode
is
still
challenging
considering
restricted
diffusion
distance
of
excitons
inability
for
transferring
energy
from
L8‐BO
to
PM1.
Herein,
incorporation
into
layer
(DIA)
strategy
employed
improve
cathode.
efficiency
LbL
OPVs
can
be
improved
18.02%
18.81%
by
incorporating
10
wt%
layer,
which
closely
associated
efficient
separation
originated
more
adequate
donor/acceptor
interface
faster
charge
transfer,
as
evidenced
magneto‐photocurrent
transient
absorption
results.
in
situ
test
morphological
characterization
clarify
that
molecular
packing
property
benefited
prolonged
aggregation
nucleation
time
assisted
DIA
strategy,
contributing
transport
inhibited
recombination
active
layers.
thickness
insensitive
also
induced
indicated
PCE
retention
value
(82.2%
vs.
74.0%)
PM1/L8‐BO:PM1
PM1/L8‐BO
when
increased
≈180
nm.
This
work
demonstrates
the
effectiveness
improving
tolerance
OPVs.
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:
2024,
Номер
36(18)
Опубликована: Янв. 27, 2024
Abstract
Although
a
suitable
vertical
phase
separation
(VPS)
morphology
is
essential
for
improving
charge
transport
efficiency,
reducing
recombination,
and
ultimately
boosting
the
efficiency
of
organic
solar
cells
(OSCs),
there
lack
theoretical
guidance
on
how
to
achieve
ideal
morphology.
Herein,
relationship
between
molecular
structure
VPS
pseudo‐planar
heterojunction
(PPHJ)
OSCs
established
by
using
surface
electrostatic
potential
(ESP)
as
bridge.
The
morphological
evolution
mechanism
revealed
studying
four
binary
systems
with
vary
difference
(∆ESP)
donors
(Ds)
acceptors
(As).
findings
manifest
that
∆ESP
increases,
active
layer
more
likely
form
well‐mixed
phase,
while
smaller
favors
Interestingly,
it
also
observed
larger
leads
enhanced
miscibility
Ds
As,
resulting
in
higher
non‐radiative
energy
losses
(ΔE
3
).
Based
these
discoveries,
ternary
PPHJ
device
meticulously
designed
an
appropriate
obtain
better
lower
ΔE
,
impressive
19.09%
achieved.
This
work
demonstrates
optimizing
ΔESP,
not
only
formation
can
be
controlled,
but
reduced,
paving
way
further
boost
OSC
performance.
Energy & Environmental Science,
Год журнала:
2024,
Номер
17(14), С. 5173 - 5182
Опубликована: Янв. 1, 2024
By
introducing
highly
crystalline
material
D18A
into
donor
layer
acting
as
energy
and
nucleating
agent,
an
optimal
PCE
of
19.25%
was
achieved
for
PM1
:
D18A/L8-BO
based
OPVs.
Advanced Energy Materials,
Год журнала:
2024,
Номер
14(11)
Опубликована: Янв. 28, 2024
Abstract
The
thin
film
deposition
engineering
of
layer‐by‐layer
(LbL)
non‐fullerene
organic
solar
cells
(OSCs)
favors
vertical
phase
distributions
donor:acceptor
(D:A),
effectively
boosting
the
power
conversion
efficiency
(PCE).
However,
previous
strategies
mainly
aimed
at
optimizing
morphology
LbL
films,
and
paid
limited
attention
to
reproducibility
device
performance.
To
achieve
high
performance
maintain
reproducibility,
a
strategy
for
hierarchical
manipulation
in
OSCs
is
developed.
A
series
devices
are
fabricated
by
introducing
vacuum‐assisted
molecular
drift
treatment
(VMDT)
donor
or
acceptor
layer
individually
simultaneously
elucidate
functionalities
this
treatment.
Essentially,
VMDT
provides
an
extended
driving
force
manipulate
molecules,
resulting
well‐defined
distribution
ordered
packing.
These
enhancements
facilitate
improvement
D:A
interface
area
charge
transport
channel,
ultimately
contributing
impressive
PCEs
19.18%
from
18.27%
devices.
More
importantly,
using
overcomes
notorious
batch‐dependent
heat
degradation
issues
OSCs,
leading
excellent
batch‐to‐batch
enhanced
stability
This
reported
method
promising
available
industrial
laboratory
use
controllably
OSCs.
ACS Materials Letters,
Год журнала:
2024,
Номер
6(7), С. 2964 - 2973
Опубликована: Июнь 12, 2024
Layer-by-layer
(LbL)
all-polymer
solar
cells
(APSCs)
are
constructed
with
or
without
the
incorporation
of
a
Pt
complex
F-Pt
as
an
energy
donor
additive
in
acceptor
layer.
The
power
conversion
efficiency
(PCE)
LbL
APSCs
can
be
enhanced
from
15.86%
to
17.14%
through
introducing
0.2
wt
%
PY-IT
layer,
originating
efficient
transfer
PM6
and
PY-IT.
well
confirmed
spectral
overlapping
between
photoluminescence
(PL)
spectra
absorption
PY-IT,
prolonged
PL
lifetime
according
transient
time-resolved
blend
films.
universality
strategy
further
PBQx-TCl/PY-DT
based
APSCs,
PCE
increased
17.57%
18.29%
by
incorporating
into
PY-DT