Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(18)
Published: March 9, 2024
Abstract
The
hole‐transporting
material
(HTM),
poly
(3,4‐ethylene
dioxythiophene)
poly(styrene
sulfonate)
(PEDOT
:
PSS),
is
the
most
widely
used
in
realization
of
high‐efficiency
organic
solar
cells
(OSCs).
However,
stability
PEDOT
PSS‐based
OSCs
quite
poor,
arising
from
its
strong
acidity
and
hygroscopicity.
In
addition,
PSS
has
an
absorption
infrared
region
high
highest
occupied
molecular
orbital
(HOMO)
energy
level,
thus
limiting
enhancement
short‐circuit
current
density
(
J
sc
)
open‐circuit
voltage
V
oc
),
respectively.
Herein,
two
asymmetric
self‐assembled
molecules
(SAMs),
namely
BrCz
BrBACz,
were
designed
synthesized
as
HTM
binary
based
on
well‐known
system
PM6
Y6,
eC9,
L8‐BO,
D18
eC9.
Compared
with
BrCz,
BrBACz
shows
larger
dipole
moment,
deeper
work
function
lower
surface
energy.
Moreover,
not
only
enhances
photon
harvesting
active
layer,
but
also
minimizes
losses
well
improves
interface
charge
extraction/
transport.
Consequently,
eC9‐based
OSC
using
exhibits
a
champion
efficiency
19.70
%
remarkable
29.20
mA
cm
−2
0.856
V,
which
record
for
so
far.
unencapsulated
device
maintains
95.0
original
after
1,000
hours
storage
at
air
ambient,
indicating
excellent
long‐term
stability.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(51)
Published: July 31, 2023
The
ternary
strategy
has
been
intensively
studied
to
improve
the
power
conversion
efficiencies
of
organic
photovoltaics.
Thereinto,
location
guest
component
plays
a
critical
role,
but
few
reports
have
devoted
this
concern.
Hereon,
distribution
LA1
as
acceptor
in
variety
scenarios
is
reported
and
dominating
driving
forces
managing
operating
modes
are
outlined.
Governed
by
appropriate
relationship
compatibility,
crystallinity,
surface
energies
between
host
acceptors,
well
interfacial
interactions
donor
dual
most
molecules
permeate
into
internal
phases,
forming
embedded
host/guest
alloy-like
aggregations.
characteristic
distributions
greatly
optimize
morphologies,
maximize
energy
transfer,
enhance
exciton/charge
behaviors.
Particularly,
PM6:IT-4F:LA1
cells
afford
high
efficiency
15.27%
with
impressive
fill
factors
(FF)
over
81%.
popularization
studies
further
verify
superiority
LA1-involved
alloy
structures,
Y6-family
component,
an
outstanding
19.17%
received.
results
highlight
importance
systems
shed
light
on
governing
distributing
guests
cells.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(18)
Published: March 9, 2024
The
hole-transporting
material
(HTM),
poly
(3,4-ethylene
dioxythiophene)
poly(styrene
sulfonate)
(PEDOT
:
PSS),
is
the
most
widely
used
in
realization
of
high-efficiency
organic
solar
cells
(OSCs).
However,
stability
PEDOT
PSS-based
OSCs
quite
poor,
arising
from
its
strong
acidity
and
hygroscopicity.
In
addition,
PSS
has
an
absorption
infrared
region
high
highest
occupied
molecular
orbital
(HOMO)
energy
level,
thus
limiting
enhancement
short-circuit
current
density
(J
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: March 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 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.
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: June 18, 2024
Organic
photovoltaics
(OPVs)
need
to
overcome
limitations
such
as
insufficient
thermal
stability
be
commercialized.
The
reported
approaches
improve
either
rely
on
the
development
of
new
materials
or
tailoring
donor/acceptor
morphology,
however,
exhibiting
limited
applicability.
Therefore,
it
is
timely
develop
an
easy
method
enhance
without
having
donor-acceptor
compatibilizers,
by
introducing
another
third
component.
Herein,
a
unique
approach
presented,
based
constructing
polymer
fiber
rigid
network
with
high
glass
transition
temperature
(T
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(33)
Published: April 26, 2024
Abstract
All‐polymer
solar
cells
(all‐PSCs)
offer
promising
potential
for
large‐scale
manufacturing
due
to
their
remarkable
mechanical
and
thermal
stability.
However,
the
limited
capacity
of
polymer
acceptors
near‐infrared
(NIR)
photon
harvesting
has
impeded
progress
in
semi‐transparent
(ST)
all‐PSCs.
Here,
study
develops
a
pair
new
NIR
acceptors,
named
PYSeF‐T
PYSe2F‐T,
with
mono‐/di‐fluorinated
end
groups
capped
selenide
monomer
backbone,
respectively.
Owing
stronger
intermolecular
interaction
intramolecular
charge
transfer
effect
di‐fluorinated
PYSe2F‐T
exhibits
crystallinity
more
bathochromic
absorption
1000
nm.
When
blended
donor,
PM6,
PY2SeF‐T‐based
all‐PSC
demonstrates
higher
efficiency
16.73%
short‐circuit
current
(
J
SC
)
27.7
mA
cm
−2
,
which
is
highest
Based
on
these,
ST
device
based
PM6:PYSe2F‐T
superior
12.52%
an
average
visible
transmittance
26.2%
light
utilization
3.28%,
outperforming
mono‐fluorinated
counterpart.
The
work
provides
in‐depth
understanding
above
synergistic
effects
develop
establishes
solid
foundation
future
investigations
into
large‐area
flexible
Polymers,
Journal Year:
2025,
Volume and Issue:
17(1), P. 115 - 115
Published: Jan. 5, 2025
This
paper
explores
a
novel
group
of
D-π-A
configurations
that
has
been
specifically
created
for
organic
solar
cell
applications.
In
these
material
compounds,
the
phenothiazine,
furan,
and
two
derivatives
thienyl-fused
IC
act
as
donor,
π-conjugated
spacer,
end-group
acceptors,
respectively.
We
assess
impact
substituents
by
introducing
bromine
atoms
at
potential
substitution
sites
on
each
acceptor
(EG1
EG2).
With
donor
π-bridge
held
constant,
we
have
employed
density
functional
theory
time-dependent
DFT
simulations
to
explore
photophysical
optoelectronic
properties
tailored
compounds
(M1–M6).
demonstrated
how
structural
modifications
influence
materials
cells.
Moreover,
all
proposed
exhibit
greater
Voc
exceeding
1.5
V,
suitable
HOMO-LUMO
energy
gap
(2.14–2.30
eV),
higher
dipole
moments
(9.23–10.90
D).
Various
decisive
key
factors
are
crucial
exploring
compounds—frontier
molecular
orbitals,
transition
matrix,
electrostatic
potential,
open-circuit
voltage,
maximum
absorption,
reduced
gradient,
charge
transfer
length
(Dindex)—were
also
explored.
Our
analysis
delivers
profound
insights
into
design
principles
optimizing
performance
applications
based
halogenated
compounds.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(3)
Published: Sept. 22, 2023
Though
encouraging
performance
is
achieved
in
small-area
organic
photovoltaics
(OPVs),
reducing
efficiency
loss
when
evoluted
to
large-area
modules
an
important
but
unsolved
issue.
Considering
that
polymer
materials
show
benefits
film-forming
processability
and
mechanical
robustness,
a
high-efficiency
all-polymer
OPV
module
demonstrated
this
work.
First,
ternary
blend
consisting
of
two
donors,
PM6
PBQx-TCl,
one
acceptor,
PY-IT,
developed,
with
which
triplet
state
recombination
suppressed
for
reduced
energy
loss,
thus
allowing
higher
voltage;
donor-acceptor
miscibility
compromised
enhanced
charge
transport,
resulting
improved
photocurrent
fill
factor;
all
these
contribute
champion
19%
OPVs.
Second,
the
delayed
crystallization
kinetics
from
solution
film
solidification
gives
longer
operation
time
window
optimized
morphology
module,
relieving
factor
record
16.26%
on
upscaled
area
19.3
cm
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(45)
Published: July 3, 2023
Abstract
P‐type
polymers
are
polymeric
semiconducting
materials
that
conduct
holes
and
have
extensive
applications
in
optoelectronics
such
as
organic
photovoltaics.
Taking
the
advantage
of
intrinsic
discontinuous
light
absorption
semiconductors,
semitransparent
photovoltaics
(STOPVs)
present
compelling
opportunities
various
potential
building‐integrated
photovoltaics,
agrivoltaics,
automobiles,
wearable
electronics.
The
characteristics
p‐type
polymers,
including
optical,
electronic,
morphological
properties,
determine
performance
STOPVs,
requirements
for
differ
between
opaque
STOPVs.
Hence,
this
Minireview,
recent
advances
used
STOPVs
systematically
summarized,
with
emphasis
on
effects
chemical
structures,
conformation
aggregation
structures
Furthermore,
new
design
concepts
guidelines
also
proposed
to
facilitate
future
development
high‐performance
