Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: April 22, 2023
Abstract
Fullerene
acceptors
typically
possess
excellent
electron-transporting
properties
and
can
work
as
guest
components
in
ternary
organic
solar
cells
to
enhance
the
charge
extraction
efficiencies.
However,
conventional
fullerene
small
molecules
suffer
from
undesirable
segregation
dimerization,
thus
limiting
their
applications
cells.
Herein
we
report
use
of
a
poly(fullerene-
alt
-xylene)
acceptor
(PFBO-C12)
component
enables
significant
efficiency
increase
16.9%
for
binary
18.0%
all-polymer
Ultrafast
optic
optoelectronic
studies
unveil
that
PFBO-C12
facilitate
hole
transfer
suppress
recombination.
Morphological
investigations
show
blends
maintain
favorable
morphology
with
high
crystallinity
smaller
domain
size.
Meanwhile,
introduction
reduces
voltage
loss
light
stability
mechanical
durability
flexible
devices.
This
demonstrates
introducing
polyfullerenes
is
an
effective
approach
achieving
highly
efficient
good
robustness.
Chemical Reviews,
Journal Year:
2022,
Volume and Issue:
122(18), P. 14180 - 14274
Published: Aug. 5, 2022
Organic
photovoltaics
(OPVs)
have
progressed
steadily
through
three
stages
of
photoactive
materials
development:
(i)
use
poly(3-hexylthiophene)
and
fullerene-based
acceptors
(FAs)
for
optimizing
bulk
heterojunctions;
(ii)
development
new
donors
to
better
match
with
FAs;
(iii)
non-fullerene
(NFAs).
The
application
NFAs
an
A–D–A
configuration
(where
A
=
acceptor
D
donor)
has
enabled
devices
efficient
charge
generation
small
energy
losses
(Eloss
<
0.6
eV),
resulting
in
substantially
higher
power
conversion
efficiencies
(PCEs)
than
FA-based
devices.
discovery
Y6-type
(Y6
2,2′-((2Z,2′Z)-((12,13-bis(2-ethylhexyl)-3,9-diundecyl-12,13-dihydro-[1,2,5]-thiadiazolo[3,4-e]-thieno[2″,3″:4′,5′]thieno-[2′,3′:4,5]pyrrolo-[3,2-g]thieno-[2′,3′:4,5]thieno-[3,2-b]indole-2,10-diyl)bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile)
A–DA′
D–A
further
propelled
the
PCEs
go
beyond
15%
due
smaller
Eloss
values
(∼0.5
eV)
external
quantum
efficiencies.
Subsequently,
Y6-series
single-junction
increased
>19%
may
soon
approach
20%.
This
review
provides
update
recent
progress
OPV
following
aspects:
developments
novel
donors,
understanding
structure–property
relationships
underlying
mechanisms
state-of-the-art
OPVs,
tasks
underpinning
commercialization
such
as
device
stability,
module
development,
potential
applications,
high-throughput
manufacturing.
Finally,
outlook
prospects
section
summarizes
remaining
challenges
technology.
Journal of the American Chemical Society,
Journal Year:
2021,
Volume and Issue:
143(7), P. 2665 - 2670
Published: Feb. 10, 2021
Despite
the
significant
progresses
made
in
all-polymer
solar
cells
(all-PSCs)
recently,
relatively
low
short-circuit
current
density
(Jsc)
and
large
energy
loss
are
still
quite
difficult
to
overcome
for
further
development.
To
address
these
challenges,
we
developed
a
new
class
of
narrow-bandgap
polymer
acceptors
incorporating
benzotriazole
(BTz)-core
fused-ring
segment,
named
PZT
series.
Compared
commonly
used
benzothiadiazole
(BT)-containing
PYT,
less
electron-deficient
BTz
renders
derivatives
with
significantly
red-shifted
optical
absorption
up-shifted
levels,
leading
simultaneously
improved
Jsc
open-circuit
voltage
resultant
all-PSCs.
More
importantly,
regioregular
(PZT-γ)
has
been
achieve
higher
regiospecificity
avoiding
formation
isomers
during
polymerization.
Benefiting
from
more
extended
absorption,
better
backbone
ordering,
optimal
blend
morphology
donor
component,
PZT-γ-based
all-PSCs
exhibit
record-high
power
conversion
efficiency
15.8%
greatly
enhanced
24.7
mA/cm2
0.51
eV.
ACS Energy Letters,
Journal Year:
2021,
Volume and Issue:
6(2), P. 598 - 608
Published: Jan. 21, 2021
Great
progress
in
organic
solar
cells
(OSCs)
has
been
recently
achieved
owing
to
the
advent
of
non-fullerene
acceptors
(NFAs).
Indeed,
low-bandgap
NFAs
ranging
from
1.3
1.6
eV
with
broad
absorption
and
easily
tunable
energy
levels
can
utilize
more
radiation
maintain
a
small
voltage
loss
when
paired
suitable
donors.
Efficient
OSCs
are
dependent
on
good
compatibility
between
donor
acceptor
materials,
active
layer
morphology
control,
device
engineering.
In
this
review,
we
summarize
some
design
synthesis
strategies
for
NFAs,
achieving
low
bandgap
high
power
conversion
efficiency.
We
also
propose
solutions
toward
innovative
materials
engineering
advance
development
applications
OSCs.
Advanced Materials,
Journal Year:
2022,
Volume and Issue:
34(35)
Published: July 15, 2022
The
development
of
polymerized
small-molecule
acceptors
has
boosted
the
power
conversion
efficiencies
(PCEs)
all-polymer
organic
photovoltaic
(OPV)
cells
to
17%.
However,
polymer
donors
suitable
for
OPV
are
still
lacking,
restricting
further
improvement
their
PCEs.
Herein,
a
new
donor
named
PQM-Cl
is
designed
and
its
performance
explored.
negative
electrostatic
potential
low
average
local
ionization
energy
distribution
surface
enable
efficient
charge
generation
transfer
process.
When
blending
with
well-used
acceptor,
PY-IT,
PQM-Cl-based
devices
deliver
an
impressive
PCE
18.0%
superior
fill
factor
80.7%,
both
which
highest
values
cells.
relevant
measurements
demonstrate
that
films
possess
excellent
mechanical
flexible
properties.
As
such,
fabricated
16.5%
high
stability
displayed.
These
results
candidate
provide
insights
into
design
high-efficient
Advanced Materials,
Journal Year:
2022,
Volume and Issue:
34(27)
Published: March 22, 2022
State-of-art
Y-series
polymer
acceptors
are
typically
based
on
a
mono-thiophene
linker,
which
can
cause
some
twisted
molecular
conformations
and
thus
limit
the
performance
of
all-polymer
solar
cells
(all-PSCs).
Here,
high-performance
acceptor
vinylene
linkers
is
reported,
leads
to
surprising
changes
in
polymers'
conformations,
optoelectronic
properties,
enhanced
photovoltaic
performance.
It
found
that
thiophene
or
bithiophene
(PY-T-γ
PY-2T-γ)
display
significant
twisting
between
end-groups
linker
units,
while
vinylene-based
(PY-V-γ)
exhibits
more
coplanar
rigid
conformation.
As
result,
PY-V-γ
demonstrates
better
conjugation
tighter
interchain
stacking,
results
higher
mobility
reduced
energetic
disorder.
Furthermore,
detailed
morphology
investigations
reveal
PY-V-γ-based
blend
high
domain
purity
fill
factor
its
all-PSCs.
With
these,
efficiency
17.1%
achieved
all-PSCs,
highest
reported
for
binary
all-PSCs
date.
This
work
vinylene-linker
superior
unit
build
with
chain
conformation,
beneficial
aggregation
efficient
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: July 12, 2023
Abstract
Distributed
photovoltaics
in
living
environment
harvest
the
sunlight
different
incident
angles
throughout
day.
The
development
of
planer
solar
cells
with
large
light-receiving
angle
can
reduce
requirements
installation
form
factor
and
is
therefore
urgently
required.
Here,
thin
film
organic
nano-sized
phase
separation
integrated
micro-sized
surface
topology
demonstrated
as
an
ideal
solution
to
proposed
applications.
All-polymer
cells,
by
means
a
newly
developed
sequential
processing,
show
magnitude
hierarchical
morphology
facilitated
exciton-to-carrier
conversion.
nano
fibrilar
donor-acceptor
network
micron-scale
optical
field
trapping
structure
combination
contributes
efficiency
19.06%
(certified
18.59%),
which
highest
value
date
for
all-polymer
cells.
Furthermore,
micron-sized
also
angle.
A
30%
improvement
power
gain
achieved
comparing
flat-morphology
devices.
These
inspiring
results
that
cell
features
are
particularly
suitable
commercial
applications
distributed
due
its
low
requirement.