Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 10, 2024
Concurrently
achieving
high
efficiency,
mechanical
robustness
and
thermal
stability
is
critical
for
the
commercialization
of
all-polymer
solar
cells
(APSCs).
However,
APSCs
usually
demonstrate
complicated
morphology,
primarily
attributed
to
polymer
chain
entanglement
which
has
a
detrimental
effect
on
their
fill
factors
(FF)
morphology
stability.
To
address
these
concerns,
an
end-group
extended
acceptor,
PY-NFT,
was
synthesized
studied.
The
analysis
showed
tightly
ordered
molecular
packing
mode
favorable
phase
separation
formed.
PM6
:
PY-NFT-based
device
achieved
exceptional
PCE
19.12
%
(certified
as
18.45
%),
outperforming
control
PY-FT
devices
(17.14
%).
This
significant
improvement
highlights
record-high
binary
APSCs.
aging
study
revealed
that
PY-NFT
blend
exhibited
excellent
morphological
stability,
thereby
superior
retaining
90
initial
efficiency
after
enduring
stress
(65
°C)
1500
hours.
More
importantly,
film
outstanding
ductility
with
crack
onset
strain
24.1
%.
Overall,
rational
chemical
structure
innovation,
especially
conjugation
extension
strategy
trigger
appropriate
stable
key
improved
robust
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Aug. 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
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(33)
Published: May 29, 2024
Designing
and
synthesizing
narrow
band
gap
acceptors
that
exhibit
high
photoluminescence
quantum
yield
(PLQY)
strong
crystallinity
is
a
highly
effective,
yet
challenging,
approach
to
reducing
non-radiative
energy
losses
(▵E
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(33)
Published: June 19, 2024
In
the
recent
advances
of
organic
solar
cells
(OSCs),
quinoxaline
(Qx)-based
nonfullerene
acceptors
(QxNFAs)
have
attracted
lots
attention
and
enabled
recorded
power
conversion
efficiency
approaching
20%.
As
an
excellent
electron-withdrawing
unit,
Qx
possesses
advantages
many
modifiable
sites,
wide
absorption
range,
low
reorganization
energy,
so
on.
To
develop
promising
QxNFAs
to
further
enhance
photovoltaic
performance
OSCs,
it
is
necessary
systematically
summarize
reported
far.
this
review,
all
focused
are
classified
into
five
categories
as
following:
SM-Qx,
YQx,
fused-YQx,
giant-YQx,
polymer-Qx
according
molecular
skeletons.
The
design
concepts,
relationships
between
structure
optoelectronic
properties,
intrinsic
mechanisms
device
discussed
in
detail.
At
end,
kind
materials
summed
up,
direction
prospected,
challenges
faced
by
given,
constructive
solutions
existing
problems
advised.
Overall,
review
presents
unique
viewpoints
conquer
challenge
thus
boost
OSCs
development
toward
commercial
applications.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(5), P. 3363 - 3372
Published: Jan. 24, 2024
Inverted
organic
solar
cells
(OSCs)
have
attracted
much
attention
because
of
their
outstanding
stability,
with
zinc
oxide
(ZnO)
being
commonly
used
as
the
electron
transport
layer
(ETL).
However,
both
surface
defects
and
photocatalytic
effect
ZnO
could
lead
to
serious
photodegradation
acceptor
materials.
This,
in
turn,
hampers
improvement
efficiency
stability
OSCs.
Herein,
we
developed
a
multiarmed
aromatic
ammonium
salt,
namely,
benzene-1,3,5-triyltrimethanaminium
bromide
(PhTMABr),
for
modifying
ZnO.
This
compound
possesses
mild
weak
acidity
aimed
at
removing
residual
amines
present
within
film.
In
addition,
PhTMABr
also
passivate
through
multiple
hydrogen-bonding
interactions
between
its
terminal
amino
groups
oxygen
anion
ZnO,
leading
better
interface
contact,
which
effectively
enhances
charge
transport.
As
result,
an
18.75%
was
achieved
based
on
modified
ETL
compared
bare
(PCE
=
17.34%).
The
devices
utilizing
retained
87%
90%
initial
PCE
after
thermal
stress
aging
65
°C
1500
h
continuous
1-sun
illumination
maximum
power
point
(MPP)
tracking
1780
h,
respectively.
Importantly,
extrapolated
T
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(9)
Published: Jan. 3, 2024
Abstract
Morphological
control
of
all‐polymer
blends
is
quintessential
yet
challenging
in
fabricating
high‐performance
organic
solar
cells.
Recently,
solid
additives
(SAs)
have
been
approved
to
be
capable
tuning
the
morphology
polymer:
small‐molecule
improving
performance
and
stability
devices.
Herein,
three
perhalogenated
thiophenes,
which
are
3,4‐dibromo‐2,5‐diiodothiophene
(SA‐T1),
2,5‐dibromo‐3,4‐diiodothiophene
(SA‐T2),
2,3‐dibromo‐4,5‐diiodothiophene
(SA‐T3),
were
adopted
as
SAs
optimize
cells
(APSCs).
For
blend
PM6
PY‐IT,
benefitting
from
intermolecular
interactions
between
thiophenes
polymers,
molecular
packing
properties
could
finely
regulated
after
introducing
these
SAs.
In
situ
UV/Vis
measurement
revealed
that
assist
morphological
character
evolution
blend,
leading
their
optimal
morphologies.
Compared
as‐cast
device
:
all
SA‐treated
binary
devices
displayed
enhanced
power
conversion
efficiencies
17.4–18.3
%
with
obviously
elevated
short‐circuit
current
densities
fill
factors.
To
our
knowledge,
PCE
18.3
for
SA‐T1‐treated
ranks
highest
among
APSCs
date.
Meanwhile,
universality
SA‐T1
other
demonstrated
unanimously
improved
performance.
This
work
provide
a
new
pathway
realizing
APSCs.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 22, 2025
The
ground-state
charge
generation
(GSCG)
in
photoactive
layers
determines
whether
the
photogenerated
carriers
occupy
deep
trap
energy
levels,
which,
turn,
affects
device
performance
of
organic
solar
cells
(OSCs).
In
this
work,
charge-quadrupole
electrostatic
interactions
are
modulated
to
achieve
GSCG
through
a
molecular
strategy
introducing
different
numbers
F
atom
substitutions
on
BTA3
side
chain.
results
show
that
8F
substitution
(BTA3-8F)
and
16F
(BTA3-16F)
lead
patterns
highest
occupied
orbital
(HOMO)
lowest
unoccupied
(LUMO)
level
changes.
perfluorination
phenyl
chain
endows
BTA3-16F
with
LUMO
similar
BTA3,
ensuring
high
VOC.
Besides,
features
large
moment,
promoting
strong
between
neighboring
molecules
along
π-π
stacking
direction,
which
then
induces
components.
This
efficient
directly
makes
significant
impact
subsequent
kinetics
exciton
dissociation,
recombination,
transport
over
longer
time
periods,
as
well
nonradiative
recombination
larger
spatial
scales.
Benefiting
from
favorable
suitable
arrangement,
PTQ10/BTA3-16F
achieves
VOC
1.302
V
PCE
11.14%,
setting
world
record
for
OSCs
greater
than
1.3
V.
addition,
is
an
effective
guest
molecule
improve
ternary
OSCs,
PM6/L8-BO/BTA3-16F-based
19.82%.
result
emphasizes
important
role
components
OSC
demonstrates
modulation
quadrupole
moments
means
designing
acceptors.
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(14), P. 4944 - 4967
Published: Jan. 1, 2024
Quinoxaline-based
nonfullerene
acceptors
show
highly
tunable
photoelectric
properties
and
superior
performance
for
sunlight
utilization
enabled
by
their
powerful
core-functionalization
ability.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(11)
Published: Jan. 24, 2024
Abstract
Developing
low‐cost
and
high‐performance
n‐type
polymer
semiconductors
is
essential
to
accelerate
the
application
of
organic
thermoelectrics
(OTEs).
To
achieve
this
objective,
it
critical
design
strong
electron‐deficient
building
blocks
with
simple
structure
easy
synthesis,
which
are
for
development
semiconductors.
Herein,
we
synthesized
two
cyano‐functionalized
highly
blocks,
namely
3,6‐dibromopyrazine‐2‐carbonitrile
(CNPz)
3,6‐Dibromopyrazine‐2,5‐dicarbonitrile
(DCNPz),
feature
structures
facile
synthesis.
CNPz
DCNPz
can
be
obtained
via
only
one‐step
reaction
three‐step
reactions
from
cheap
raw
materials,
respectively.
Based
on
DCNPz,
acceptor–acceptor
(A–A)
polymers,
P(DPP‐CNPz)
P(DPP‐DCNPz)
successfully
developed,
featuring
deep‐positioned
lowest
unoccupied
molecular
orbital
(LUMO)
energy
levels,
beneficial
thin‐film
transistors
(OTFTs)
OTEs
performance.
An
optimal
unipolar
electron
mobility
0.85
1.85
cm
2
V
−1
s
P(DPP‐DCNPz),
When
doped
N
‐DMBI,
show
high
electrical
conductivities/power
factors
25.3
S
/41.4
μ
W
m
K
−2
,
33.9
/30.4
Hence,
pyrazine
represent
a
new
class
structurally
simple,
readily
accessible
block
constructing