Nature Communications,
Journal Year:
2022,
Volume and Issue:
13(1)
Published: May 11, 2022
Enhancing
the
luminescence
property
without
sacrificing
charge
collection
is
one
key
to
high-performance
organic
solar
cells
(OSCs),
while
limited
by
severe
non-radiative
recombination.
Here,
we
demonstrate
efficient
OSCs
with
high
via
design
and
synthesis
of
an
asymmetric
non-fullerene
acceptor,
BO-5Cl.
Blending
BO-5Cl
PM6
donor
leads
a
record-high
electroluminescence
external
quantum
efficiency
0.1%,
which
results
in
low
voltage
loss
0.178
eV
power
conversion
(PCE)
over
15%.
Importantly,
incorporating
as
third
component
into
widely-studied
donor:acceptor
(D:A)
blend,
PM6:BO-4Cl,
allows
device
displaying
certified
PCE
18.2%.
Our
joint
experimental
theoretical
studies
unveil
that
more
diverse
D:A
interfacial
conformations
formed
acceptor
induce
optimized
blend
energetics,
contributes
improved
performance
balancing
generation
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.
Advanced Materials,
Journal Year:
2022,
Volume and Issue:
34(13)
Published: Jan. 26, 2022
Improving
charge
extraction
and
suppressing
recombination
are
critically
important
to
minimize
the
loss
of
absorbed
photons
improve
device
performance
polymer
solar
cells
(PSCs).
In
this
work,
highly
efficient
PSCs
demonstrated
by
progressively
improving
through
combination
side-chain
engineering
new
nonfullerene
acceptors
(NFAs),
adopting
ternary
blends,
introducing
volatilizable
solid
additives.
The
2D
side
chains
on
BTP-Th
induce
a
certain
steric
hindrance
for
molecular
packing
phase
separation,
which
is
mitigated
fluorination
BTP-FTh.
Moreover,
two
crystalline
molecules
as
second
acceptor
additive,
respectively,
into
BTP-FTh-based
host
blend,
crystallinity
significantly
improved
blend
morphology
finely
optimized.
As
expected,
enhanced
suppressed
realized,
contributing
largely
fill
factor
(FF)
resultant
devices.
Accompanied
open-circuit
voltage
(Voc
)
short-circuit
current
density
(Jsc
),
record
high
power
conversion
efficiency
(PCE)
19.05%
realized
finally.
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
33(27)
Published: May 28, 2021
Abstract
The
trade‐off
between
the
open‐circuit
voltage
(
V
oc
)
and
short‐circuit
current
density
J
sc
has
become
core
of
organic
photovoltaic
research,
realizing
minimum
energy
offsets
that
can
guarantee
effective
charge
generation
is
strongly
desired
for
high‐performance
systems.
Herein,
a
ternary
solar
cell
with
power
conversion
efficiency
over
18%
using
large‐bandgap
polymer
donor,
PM6,
small‐bandgap
alloy
acceptor
containing
two
structurally
similar
nonfullerene
acceptors
(Y6
AQx‐3)
reported.
This
system
take
full
advantage
irradiation
forms
favorable
morphology.
By
varying
ratio
acceptors,
delicate
regulation
levels
achieved,
thereby
affecting
dynamics
in
devices.
optimal
device
exhibits
more
efficient
hole
transfer
exciton
separation
than
PM6:AQx‐3‐based
reduced
loss
compared
PM6:Y6‐based
system,
contributing
to
better
performance.
Such
“two‐in‐one”
strategy,
which
synergizes
highly
compatible
provides
promising
path
boosting
performance
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: March 30, 2023
Non-fullerene
acceptors
based
organic
solar
cells
represent
the
frontier
of
field,
owing
to
both
materials
and
morphology
manipulation
innovations.
Non-radiative
recombination
loss
suppression
performance
boosting
are
in
center
cell
research.
Here,
we
developed
a
non-monotonic
intermediate
state
strategy
for
state-of-the-art
by
employing
1,3,5-trichlorobenzene
as
crystallization
regulator,
which
optimizes
film
process,
regulates
self-organization
bulk-heterojunction
manner,
i.e.,
first
enhancing
then
relaxing
molecular
aggregation.
As
result,
excessive
aggregation
non-fullerene
is
avoided
have
achieved
efficient
with
reduced
non-radiative
loss.
In
PM6:BTP-eC9
cell,
our
successfully
offers
record
binary
efficiency
19.31%
(18.93%
certified)
very
low
0.190
eV.
And
lower
0.168
eV
further
PM1:BTP-eC9
(19.10%
efficiency),
giving
great
promise
future
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
33(33)
Published: July 10, 2021
Abstract
The
ternary
strategy,
introducing
a
third
component
into
binary
blend,
opens
simple
and
promising
avenue
to
improve
the
power
conversion
efficiency
(PCE)
of
organic
solar
cells
(OSCs).
judicious
selection
an
appropriate
component,
without
sacrificing
photocurrent
voltage
output
OSC,
is
significant
importance
in
devices.
Herein,
highly
efficient
OSCs
fabricated
using
approach
are
demonstrated,
wherein
novel
non‐fullerene
acceptor
L8‐BO‐F
designed
incorporated
PM6:BTP‐eC9
blend.
three
components
show
complementary
absorption
spectra
cascade
energy
alignment.
BTP‐eC9
found
form
homogeneous
mixed
phase,
which
improves
molecular
packing
both
donor
materials,
optimizes
blend
morphology.
Moreover,
addition
suppresses
non‐radiative
recombination,
thus
leading
reduced
loss.
Consequently,
concurrent
increases
open‐circuit
voltage,
short‐circuit
current,
fill
factor
realized,
resulting
unprecedented
PCE
18.66%
(certified
value
18.2%),
represents
highest
values
reported
for
single‐junction
tandem
so
far.
