Advanced Materials,
Год журнала:
2023,
Номер
35(21)
Опубликована: Март 3, 2023
The
ternary
blend
is
demonstrated
as
an
effective
strategy
to
promote
the
device
performance
of
organic
photovoltaics
(OPVs)
due
dilution
effect.
While
compromise
between
charge
generation
and
recombination
remains
a
challenge.
Here,
mixed
diluent
for
further
improving
efficiency
OPV
proposed.
Specifically,
high-performance
system
with
polymer
donor,
i.e.,
PM6,
nonfullerene
acceptor
(NFA),
BTP-eC9,
diluted
by
diluents,
which
involve
high
bandgap
NFA
BTP-S17
low
BTP-S16
(similar
that
BTP-eC9).
better
miscibility
BTP-eC9
can
dramatically
enhance
open-circuit
voltage
(VOC
),
while
maximizes
or
short-circuit
current
density
(JSC
).
interplay
BTP-17
enables
recombination,
thus
leading
19.76%
(certified
19.41%),
best
among
single-junction
OPVs.
Further
analysis
on
carrier
dynamics
validates
efficacy
diluents
balancing
be
attributed
more
diverse
energetic
landscapes
improved
morphology.
Therefore,
this
work
provides
commercialization.
ACS Energy Letters,
Год журнала:
2020,
Номер
5(5), С. 1554 - 1567
Опубликована: Апрель 7, 2020
With
the
recent
emergence
of
a
new
class
high-performance
nonfullerene
acceptors
(NFAs),
organic
solar
cells
(OSCs)
have
entered
phase
research
featuring
high
power
conversion
efficiencies
(PCEs).
In
this
Perspective,
we
summarize
progress
made
from
Y-series
NFAs
and
matched
polymer
donors
analyze
molecular
design
strategies
for
boosting
device
performance.
We
also
perform
PCE
prediction
OSCs
propose
requirements
NFAs,
aiming
at
20%,
which
is
comparable
to
those
Si
perovskite-based
counterparts.
Finally,
assess
three
factors
efficiency,
stability,
cost
outline
challenges
facing
future
development
directions
OSCs.
This
work
expected
provide
valuable
suggestions
with
comprehensive
view
advance
practical
application
National Science Review,
Год журнала:
2019,
Номер
7(7), С. 1239 - 1246
Опубликована: Дек. 5, 2019
Abstract
The
development
of
organic
photoactive
materials,
especially
the
newly
emerging
non-fullerene
electron
acceptors
(NFAs),
has
enabled
rapid
progress
in
photovoltaic
(OPV)
cells
recent
years.
Although
power
conversion
efficiencies
(PCEs)
top-performance
OPV
have
surpassed
16%,
devices
are
usually
fabricated
via
a
spin-coating
method
and
not
suitable
for
large-area
production.
Here,
we
demonstrate
that
fine-modification
flexible
side
chains
NFAs
can
yield
17%
PCE
cells.
More
crucially,
as
optimal
NFA
solubility
thus
desirable
morphology,
high
spin-coated
be
maintained
when
using
scalable
blade-coating
processing
technology.
Our
results
suggest
optimization
chemical
structures
materials
improve
device
performance.
This
great
significance
larger-area
production
technologies
provide
important
scientific
insights
commercialization
Nature Communications,
Год журнала:
2019,
Номер
10(1)
Опубликована: Фев. 4, 2019
Abstract
Despite
significant
development
recently,
improving
the
power
conversion
efficiency
of
organic
photovoltaics
(OPVs)
is
still
an
ongoing
challenge
to
overcome.
One
prerequisites
achieving
this
goal
enable
efficient
charge
separation
and
small
voltage
losses
at
same
time.
In
work,
a
facile
synthetic
strategy
reported,
where
optoelectronic
properties
are
delicately
tuned
by
introduction
electron-deficient-core-based
fused
structure
into
non-fullerene
acceptors.
Both
devices
exhibited
low
loss
0.57
V
high
short-circuit
current
density
22.0
mA
cm
−2
,
resulting
in
efficiencies
over
13.4%.
These
unconventional
acceptors
with
near-infrared
absorption
lead
non-radiative
recombination
photovoltaics,
contributing
certified
12.6%.
Advanced Energy Materials,
Год журнала:
2020,
Номер
10(26)
Опубликована: Май 4, 2020
Abstract
Tandem
solar
cells
are
the
next
step
in
photovoltaic
(PV)
evolution
due
to
their
higher
power
conversion
efficiency
(PCE)
potential
than
currently
dominating,
but
inherently
limited,
single‐junction
cells.
With
emergence
of
metal
halide
perovskite
absorber
materials,
fabrication
highly
efficient
tandem
cells,
at
a
reasonable
cost,
can
significantly
impact
future
PV
landscape.
The
perovskite‐based
have
already
shown
that
they
convert
light
more
efficiently
standalone
sub‐cells.
However,
reach
PCEs
over
30%,
several
challenges
be
overcome
and
understanding
this
fascinating
technology
has
broadened.
In
review,
main
scientific
engineering
field
presented,
alongside
discussion
current
status
three
technologies:
perovskite/silicon,
perovskite/CIGS,
perovskite/perovskite
A
summary
advanced
structural,
electrical,
optical,
radiative,
electronic
characterization
methods
as
well
simulations
being
utilized
for
is
presented.
findings
summarized
strength
techniques
gain
deeper
knowledge
further
performance
improvement
assessed.
Finally,
PCE
different
experimental
theoretical
limits
compared
with
an
aim
shed
on
path
towards
overcoming
30%
threshold
all
herein
reviewed
technologies.
Energy & Environmental Science,
Год журнала:
2022,
Номер
15(6), С. 2537 - 2544
Опубликована: Янв. 1, 2022
A
novel
electron
acceptor,
BTP-H2,
demonstrates
a
high
efficiency
of
18.5%
with
V
oc
0.932
V.
It
also
enables
the
ternary
device
to
yield
an
19.2%,
ranking
highest
among
single-junction
organic
photovoltaics.
Advanced Materials,
Год журнала:
2021,
Номер
33(33)
Опубликована: Июль 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.
