The Journal of Physical Chemistry C,
Journal Year:
2023,
Volume and Issue:
127(51), P. 24683 - 24688
Published: Dec. 18, 2023
In
the
field
of
organic
semiconductors,
molecular
planarity
is
widely
recognized
as
a
critical
requirement
for
facilitating
efficient
intermolecular
charge
transport
(CT)
and
achieving
high
film
mobility.
contrast,
here,
we
demonstrate
that
large
aromatic
side
moieties
modified
on
IDT
(indaceno[1,2-b:5,6-b′]dithiophene),
which
are
not
conducive
to
thus
CT
between
two
molecules,
yet
enhance
mobility
by
creating
more
intramolecular
channels,
evidenced
theoretical
simulations.
The
work
implies
possibility
utilizing
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
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 3, 2024
Solvent
additives
with
a
high
boiling
point
(BP)
and
low
vapor
pressure
(VP)
have
formed
key
handle
for
improving
the
performance
of
organic
solar
cells
(OSCs).
However,
it
is
not
always
clear
whether
they
remain
in
active-layer
film
after
deposition,
which
can
negatively
affect
reproducibility
stability
OSCs.
In
this
study,
an
easily
removable
solvent
additive
(4-chloro-2-fluoroiodobenzene
(CFIB))
BP
VP
introduced,
behaving
like
volatile
solid
that
be
completely
removed
during
device
fabrication
process.
In-depth
studies
CFIB
addition
into
D18-Cl
donor
N3
acceptor
validate
its
dominant
non-covalent
intermolecular
interactions
through
effective
electrostatic
interactions.
Such
phenomena
improve
charge
dynamics
kinetics
by
optimizing
morphology,
leading
to
enhanced
D18-Cl:N3-based
devices
power
conversion
efficiency
18.54%.
The
CFIB-treated
exhibits
exceptional
thermal
(T80
lifetime
=
120
h)
at
85
°C
compared
CFIB-free
device,
because
morphological
robustness
evolving
no
residual
film.
features
combination
advantages
(easy
application)
(high
volatility)
additives,
demonstrating
great
potential
use
commercial
mass
production
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(31)
Published: May 18, 2024
Multi-component
copolymerized
donors
(MCDs)
have
gained
significant
interest
and
been
rapidly
developed
in
flexible
organic
solar
cells
(f-OSCs)
recent
years.
However,
ensuring
the
power
conversion
efficiency
(PCE)
of
f-OSCs
while
retaining
ideal
mechanical
properties
remains
an
enormous
challenge.
The
fracture
strain
(FS)
value
typical
high-efficiency
blend
films
is
generally
less
than
8
%,
which
far
from
application
standards
wearable
photovoltaic
devices.
Therefore,
we
a
series
novel
MCDs
after
meticulous
molecular
design.
Among
them,
consistent
MCD
backbone
end-capped
functional
group
formed
highly
conjugated
plane,
solubilization
were
effectively
optimized
by
modifying
proportion
solubilized
alkyl
chains.
Consequently,
due
to
formation
entangled
structures
with
frozen
film
morphology
considerably
improved
high
ductility
active
layer,
P1
Small Science,
Journal Year:
2024,
Volume and Issue:
4(7)
Published: April 15, 2024
Recent
advancements
in
blade‐coating
organic
photovoltaic
(OPV)
devices
utilizing
eco‐friendly
nonhalogenated
solvents
have
demonstrated
high
power
conversion
efficiencies
(PCEs)
when
processed
at
substrate
temperatures.
However,
this
method
poses
challenges
device
reproducibility
and
stability.
Herein,
a
BTP‐eC9‐
γ
nonfullerene
acceptor
(analogous
to
BTP‐eC9)
with
‐position‐branched
inner
side
chains
within
the
BTP‐eC9‐based
structural
motif
is
developed.
This
pin‐sized
extension
branching
position
enhances
solubility
of
toluene
solvent.
improvement
not
only
mitigates
excessive
aggregation
film
state
but
also
facilitates
fabrication
lower
Optimized
temperature
40
°C,
‐based
achieve
remarkable
PCEs
16.43%
(0.04
cm
2
)
14.95%
(1.0
).
Furthermore,
these
retain
their
uniformity
which
contributes
superior
reproducibility.
attributed
minimized
alteration
evolution
kinetics
fluid
flow.
These
findings
signify
promising
direction
for
industrial
production
OPV
devices.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(38)
Published: May 22, 2024
Abstract
The
significant
progress
of
p‐type
and
n‐type
active
layer
materials
in
the
past
several
years
has
pushed
power
conversion
efficiency
(PCE)
organic
solar
cells
(OSCs)
toward
19%.
Due
to
relatively
low
synthesis
cost
simple
method
carboxylate‐containing
building
blocks,
including
thiophene,
thieno[3,2‐b]thiophene,
thieno[3,4‐b]thiophene,
furan,
pyrazine,
benzodithiophene,
benzothiazole,
quinoxaline,
etc.,
are
widely
used
construct
photovoltaic
polymers.
These
resulting
carboxylate‐bearing
polymers
present
downward
energy
levels,
high
absorption
coefficient,
narrow
bandgap,
hole
mobility,
strong
aggregation
behavior,
which
have
dabbled
fabrication
mechanically
stretchable,
semitransparent,
indoor,
tandem
OSCs,
produce
excellent
performance.
low‐cost
copolymers
exhibit
a
satisfying
PCE
approaching
17%,
random
terpolymer
systems
achieve
over
This
review
focuses
on
polymers,
summarizes
molecular
characteristics,
discusses
their
structure‐performance
relationship,
offers
summary
outlook
challenges
for
future
development.
Macromolecules,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 16, 2024
Low-cost
carboxylate-modified
thiophene-based
polymers
show
promising
potential
in
organic
solar
cells
(OSCs).
Further
optimizing
the
film
morphology
via
simple
molecular
engineering
to
improve
their
power
conversion
efficiencies
(PCEs)
is
significant
pursuing
a
cost-effective
balance.
Herein,
we
developed
new
wide-bandgap
polymer,
TTC-F-BDF,
by
copolymerizing
benzodifuran
(BDF)
with
thieno[3,2-b]thiophene
(TTC),
which
derived
from
counterpart
TTC-F,
contains
benzodithiophene
(BDT)
units.
Incorporating
BDF
can
effectively
tailor
aggregation
and
packing
order
optimize
morphology,
thus
improving
charge
transport,
recombination,
collection
processes,
ultimately
boosting
fill
factor
(FF)
PCE.
The
TTC-F-BDF:
L8-BO-based
OSCs
achieved
PCE
of
up
16.9%
an
enhanced
FF
0.75,
among
top
values
for
carboxylate-containing
copolymer-based
OSCs.
As
control,
TTC-F:
L8-BO
blends
showed
15.1%,
moderate
0.67.
In
Cl-BTA3
systems,
TTC-F-BDF
attained
higher
11.2%,
compared
TTC-F
(PCE
=
10.0%),
attributed
improved
(0.74
vs
0.65).
Besides
that,
replacing
BDT
cheap
unit
also
contributes
reducing
production
costs.
This
work
provides
effective
design
strategy
efficiency
breakthrough
photovoltaic
polymers.
Organic
solar
cells
have
seen
significant
progress
in
the
past
2
decades
with
power
conversion
efficiencies
(PCEs)
exceeding
20%
but
mostly
based
on
high-cost
photovoltaic
materials.
Polythiophenes
(PTs)
without
a
fused-ring
structure
are
good
candidates
as
low-cost
donor
materials,
deserving
more
attention
for
studying.
In
this
work,
ester-substituted
thiazole
(E-Tz)
was
explored
electron-withdrawing
unit
to
design
PTs,
and
further
optimization
fluorinated/nonfluorinated
segment
contents
via
copolymerization
strategy
simultaneously
performed,
yielding
polymer
donors
of
PTETz-100F,
PTETz-80F,
PTETz-0F.
Suitable
temperature-dependent
aggregation
reasonable
phase
separation
compact
molecular
packing
improved
charge
transport
were
achieved
PTETz-80F-based
system,
resulting
higher
exciton
dissociation
probability
collection
probability.
Thereby,
devices
PTETz-80F:L8-BO
exhibited
best
performance
PCE
12.69%.
addition,
synthetic
complexity
PTETz-XF
polymers
is
46.05%,
which
significantly
lower
than
those
other
representative
high-performance
donors.
This
work
demonstrates
feasibility
designing
PTs
an
E-Tz
effectiveness
material
property
device
optimization.
Advanced Materials Technologies,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 19, 2025
Abstract
Quantum
dots
stand
as
an
outstanding
choice
for
high‐tech
applications
due
to
their
fascinating
edge
and
quantum
confinement
effects
unique
optoelectronic
properties.
By
using
4‐bromobenzenediazonium‐modified
MXene
a
key
zero‐dimensional
template,
highly
soluble
poly[1,4‐diethynylbenzene‐
alt
‐spiropyran]
(PBSP)‐covalently
functionalized
(PBSP‐MQDs),
in
which
two
structural
isomers
of
spiropyran
(i.e.,
ring‐opened
merocyanine
ring‐closed
spiropyran)
can
interconvert
into
each
other
rapidly
under
different
light
illumination,
are
synthesized
situ.
The
weight
percentage
MQDs
PBSP‐MQDs
is
10.4%.
For
comparison
purpose,
PBSP‐covalently
grafted
nanosheets
(PBSP‐MXene)
PBSP
also
the
same
conditions.
Upon
UV
or
blue
these
reference
materials
do
not
show
any
memristive
effect
at
sweep
range
±0.5
V.
On
contrary,
as‐fabricated
ITO/PBSP‐MQDs/ITO
device
shows
history‐dependent
switching
performance,
with
32
distinguishable
conductance
states,
experimental
difference
current
between
adjacent
conductive
states
parameters,
simple
convolutional
neural
network
facial
recognition
successfully
constructed.
After
200
epochs
training,
accuracy
reaches
up
97.23%.
