Energies,
Journal Year:
2023,
Volume and Issue:
16(11), P. 4494 - 4494
Published: June 2, 2023
The
power
conversion
efficiencies
(PCEs)
of
organic
photovoltaics
(OPVs)
have
reached
more
than
19%,
along
with
the
prosperous
development
materials
and
device
engineering.
It
is
meaningful
to
make
a
comprehensive
review
research
OPVs
for
further
performance
improvement.
In
this
review,
some
typical
high-performance
are
summarized,
including
representative
polymer
donor
materials,
non-fullerene
acceptor
interfacial
modification
as
well
their
design
rules
molecular
From
point
view
engineering,
active
layer
treatment
deposition
technology
introduced,
which
can
play
critical
role
in
adjusting
degree
aggregation
vertical
distribution.
Meanwhile,
ternary
strategy
has
been
confirmed
an
efficient
method
improving
OPVs,
multiple
roles
appropriate
third
component
photo-electronic
process
emphasized
analyzed.
challenges
perspectives
concerning
region
also
put
forward
developing
OPVs.
Advanced Science,
Journal Year:
2022,
Volume and Issue:
9(30)
Published: Aug. 23, 2022
The
large
energy
loss
(Eloss
)
is
one
of
the
main
obstacles
to
further
improve
photovoltaic
performance
organic
solar
cells
(OSCs),
which
closely
related
charge
transfer
(CT)
state.
Herein,
ternary
donor
alloy
strategy
used
precisely
tune
CT
state
(ECT
and
thus
Eloss
for
boosting
efficiency
OSCs.
elevated
ECT
in
OSCs
reduce
generation
(ΔECT
),
promote
hybridization
between
localized
excitation
nonradiative
(ΔEnonrad
).
Together
with
optimal
morphology,
afford
an
impressive
power
conversion
19.22%
a
significantly
improved
open-circuit
voltage
(Voc
0.910
V
without
sacrificing
short-cicuit
density
(Jsc
fill
factor
(FF)
comparison
binary
ones.
This
contribution
reveals
that
tuning
via
efficient
way
minimize
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(26)
Published: March 23, 2022
Abstract
Integrating
desirable
light
absorption,
energy
levels,
and
morphology
in
one
matrix
is
always
the
aspiration
to
construct
high‐performance
organic
solar
cells
(OSCs).
Herein,
an
asymmetric
acceptor
Y6‐1O
incorporated
into
binary
blends
of
Y7‐BO
donor
PM6
prepare
ternary
OSCs.
Two
isogenous
asymmetric–symmetric
acceptors
with
similar
chemical
skeletons
tend
form
alloy‐like
state
due
their
good
compatibility,
which
contributes
optimizing
for
efficient
charge
generation
extraction.
The
complementary
absorption
two
helps
improve
photon
harvesting
blends,
higher
lowest
unoccupied
molecular
orbital
(LUMO)
level
offers
chance
uplift
mixed
LUMO
levels
acceptors.
Combining
aforesaid
benefits,
OSCs
10
wt%
produce
a
top‐ranked
power
conversion
efficiency
(PCE)
18.11%
simultaneously
elevated
short‐circuit
current
density,
open‐circuit
voltage,
fill
factor
comparison
Y7‐BO‐based
devices.
Furthermore,
optimized
≈300
nm
active
layers
obtain
champion
PCE
16.61%,
highest
value
thick‐film
devices
reported
so
far.
This
work
puts
forward
avenue
further
boosting
performance
but
different
structures.
Energy & Environmental Science,
Journal Year:
2023,
Volume and Issue:
16(3), P. 1062 - 1070
Published: Jan. 1, 2023
A
nonfullerene
acceptor,
isoIDITC,
capable
of
exhibiting
fibril-like
morphology,
is
utilized
as
a
third
component
in
organic
photovoltaic
devices.
power
conversion
efficiency
19%
achieved
ternary
PM6:BTP-eC9:isoIDITC
bulk-heterojunction
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(20)
Published: Aug. 25, 2023
Abstract
Over
the
past
three
years,
remarkable
advancements
in
organic
solar
cells
(OSCs)
have
emerged,
propelled
by
introduction
of
Y6—an
innovative
A‐DA'D‐A
type
small
molecule
non‐fullerene
acceptor
(NFA).
This
review
provides
a
critical
discussion
current
knowledge
about
structural
and
physical
properties
PM6:Y6
material
combination
relation
to
its
photovoltaic
performance.
The
design
principles
PM6
Y6
are
discussed,
covering
charge
transfer,
transport,
recombination
mechanisms.
Then,
authors
delve
into
blend
morphology
degradation
mechanisms
before
considering
commercialization.
state
art
is
presented,
while
also
discussing
unresolved
contentious
issues,
such
as
energetics,
pathways
free
generation,
role
triplet
states
recombination.
As
such,
this
aims
provide
comprehensive
understanding
potential
for
further
development
field
cells.
By
addressing
both
successes
challenges
associated
with
system,
contributes
ongoing
research
efforts
toward
achieving
more
efficient
stable
ACS Energy Letters,
Journal Year:
2022,
Volume and Issue:
7(8), P. 2845 - 2855
Published: Aug. 3, 2022
A
ternary
strategy
has
been
considered
to
be
a
simple
and
efficient
method
further
improve
the
performance
of
organic
solar
cells
(OSCs).
Here,
three
benzotriazole-based
nonfullerene
acceptors
(NFAs)
with
similar
A2-A1-D-A1-A2
backbones
except
for
different
terminal
groups,
are
utilized
as
guest
components
classic
PM6:BTP-BO-4F
binary
host.
Excitingly,
BTA1–3
all
realize
much
better
photovoltaic
in
devices
minimized
energy
loss
(Eloss)
improved
open-circuit
voltage
(VOC),
suggesting
that
it
is
bridge
A1
unit
plays
decisive
role.
Additionally,
short-circuit
current
density
(JSC)
fill
factor
(FF)
BTA2-/BTA3-incorporated
can
enhanced
simultaneously,
resulting
from
more
photon
harvesting,
increased
exciton
dissociation,
charge
transport,
reduced
recombination.
The
highest
efficiency
18.27%
obtained
BTA2
device,
one
top
values
PM6-based
OSCs.
This
work
suggests
type
NFAs
effective
improving
Advanced Science,
Journal Year:
2023,
Volume and Issue:
10(26)
Published: July 9, 2023
The
sequential
deposition
method
assists
the
vertical
phase
distribution
in
photoactive
layer
of
organic
solar
cells,
enhancing
power
conversion
efficiencies.
With
this
film
coating
approach,
morphology
both
layers
can
be
fine-tuned
with
high
boiling
solvent
additives,
as
frequently
applied
one-step
casting
films.
However,
introducing
liquid
additives
compromise
morphological
stability
devices
due
to
residuals.
Herein,
1,3,5-tribromobenzene
(TBB)
volatility
and
low
cost,
is
used
a
solid
additive
acceptor
solution
combined
thermal
annealing
regulate
cells
composed
D18-Cl/L8-BO.
Compared
control
treated
TBB
those
that
underwent
additional
processing
exhibit
increased
exciton
generation
rate,
charge
carrier
mobility,
lifetime,
reduced
bimolecular
recombination.
As
result,
TBB-treated
achieve
champion
efficiency
18.5%
(18.1%
averaged),
one
highest
efficiencies
binary
open
circuit
voltage
exceeding
900
mV.
This
study
ascribes
advanced
device
performance
gradient-distributed
donor-acceptor
concentrations
direction.
findings
provide
guidelines
for
optimizing
sequentially
deposited
top
high-performance
cells.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(28)
Published: Feb. 28, 2024
Abstract
The
achievement
of
high
performance
in
organic
solar
cells
(OSCs)
is
highly
dependent
on
efficient
exciton
dissociation.
However,
a
comprehensive
understanding
the
dissociation
process
under
photoexcitation
OSCs
remains
elusive.
Herein,
prototypical
system
PM6:Y6
adopted
to
explore
process.
An
semiconductor
PCz
with
distinctive
signals
from
PM6
and
Y6
incorporated
as
third
component.
Femtosecond
transient
absorption
spectroscopy
demonstrates
clear
cascade
charge
transfer
processes
ternary
PM6:PCz:Y6
system.
These
channels
contribute
enhancing
efficiency
Consequently,
nonradiative
recombination
energy
loss
reduced,
resulting
an
improved
power
conversion
(PCE)
OSCs.
Furthermore,
reduction
verified
different
When
introduced
into
D18:L8‐BO
system,
low
0.175
eV
demonstrated,
contributing
PCE
over
19%.
This
work
highlights
that
insight
enables
losses
for
Small,
Journal Year:
2022,
Volume and Issue:
18(21)
Published: April 21, 2022
Molecule
engineering
has
been
demonstrated
as
a
valid
strategy
to
adjust
the
active
layer
morphology
in
all-small-molecule
organic
solar
cells
(ASM-OSCs).
In
this
work,
two
non-fullerene
acceptors
(NFAs),
FO-2Cl
and
FO-EH-2Cl,
with
different
alkyl
side
chains
are
reported
applied
ASC-OSCs.
Compared
FO-2Cl,
FO-EH-2Cl
is
designed
by
replacing
octyl
branched
iso-octyl
chains,
leading
an
enhanced
molecular
packing,
crystallinity,
redshifted
absorption.
With
small
molecule
BSFTR
donor,
device
of
BSFTR:FO-EH-2Cl
obtains
better
achieves
higher
power
conversion
efficiency
(PCE)
15.78%
notable
fill
factor
(FF)
80.44%
than
that
FO-2Cl-based
PCE
15.27%
FF
78.41%.
To
authors'
knowledge,
highest
value
ASM-OSCs.
These
results
demonstrate
good
example
fine-tuning
structure
achieve
suitable
promising
performance
for
ASM-OSCs,
which
can
provide
valuable
insight
into
material
design
high-efficiency
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(46)
Published: July 12, 2023
Abstract
Non‐fullerene
acceptors
(NFAs)
are
a
crucial
component
of
organic
photovoltaics,
and
they
have
gained
significant
attention
due
to
their
outstanding
photoelectric
conversion
efficiency.
However,
the
recognition
reactions
specific
building
blocks
in
NFAs
largely
overlooked
construction
photoelectrochemical
(PEC)
biosensing
platforms.
In
this
study,
potential
Y6,
prototype
NFA,
is
explored
construct
sensitive
PEC
biosensor
for
monitoring
urease
activity
selective
chemical
reactivity
its
blocks.
The
resultant
relies
on
urease‐mediated
enzymatic
reaction,
which
produces
OH
−
anions
that
act
as
nucleophilic
reagent
linkage
C═C
Y6
moiety.
This
results
formation
Y6‐OH,
exhibits
depressive
response
destroyed
conjugated
structure
intramolecular
charge
transfer.
As
expected,
linear
relationship
observed
between
recession
performance
concentration
urease,
with
good
sensitivity
selectivity.
Furthermore,
detection
also
successfully
realized
human
saliva
samples,
suggesting
promising
NFA‐based
biosensors
clinical
applications
even
absence
common
biological
units.
