Crystals,
Год журнала:
2022,
Номер
12(2), С. 168 - 168
Опубликована: Янв. 24, 2022
Non-fullerene
acceptors
are
promising
to
achieve
high
efficiency
in
organic
solar
cells
(OSCs).
Y6-based
acceptors,
one
group
of
new
n-type
semiconductors,
have
triggered
tremendous
attention
when
they
reported
a
power-conversion
(PCE)
15.7%
2019.
After
that,
scientists
trying
improve
the
different
aspects
including
choosing
donors,
tuning
Y6
structures,
and
device
engineering.
In
this
review,
we
first
summarize
properties
materials
seven
critical
methods
modifying
structure
PCEs
developed
latest
three
years
as
well
basic
principles
parameters
OSCs.
Finally,
authors
would
share
perspectives
on
possibilities,
necessities,
challenges,
potential
applications
for
designing
multifunctional
with
desired
performances
via
machine
learning.
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.
Angewandte Chemie International Edition,
Год журнала:
2021,
Номер
60(23), С. 12964 - 12970
Опубликована: Апрель 2, 2021
Abstract
Despite
the
remarkable
progress
achieved
in
recent
years,
organic
photovoltaics
(OPVs)
still
need
work
to
approach
delicate
balance
between
efficiency,
stability,
and
cost.
Herein,
two
fully
non‐fused
electron
acceptors,
PTB4F
PTB4Cl,
are
developed
via
a
two‐step
synthesis
from
single
aromatic
units.
The
introduction
of
two‐dimensional
chain
halogenated
terminals
for
these
acceptors
plays
synergistic
role
optimizing
their
solid
stacking
orientation,
thus
promoting
an
elongated
exciton
lifetime
fast
charge‐transfer
rate
bulk
heterojunction
blends.
As
result,
upon
blending
with
PBDB‐TF
polymer,
has
enabled
single‐junction
OPVs
power
conversion
efficiencies
12.76
%,
representing
highest
values
among
reported
unfused
so
far.
Advanced Materials,
Год журнала:
2021,
Номер
34(10)
Опубликована: Окт. 28, 2021
Abstract
Near‐infrared
(NIR)‐absorbing
organic
semiconductors
have
opened
up
many
exciting
opportunities
for
photovoltaic
(OPV)
research.
For
example,
new
chemistries
and
synthetical
methodologies
been
developed;
especially,
the
breakthrough
Y‐series
acceptors,
originally
invented
by
our
group,
specifically
Y1,
Y3,
Y6,
contributed
immensely
to
boosting
single‐junction
solar
cell
efficiency
around
19%;
novel
device
architectures
such
as
tandem
transparent
photovoltaics
realized.
The
concept
of
NIR
donors/acceptors
thus
becomes
a
turning
point
in
OPV
field.
Here,
development
NIR‐absorbing
materials
OPVs
is
reviewed.
According
low‐energy
absorption
window,
here,
(p‐type
(polymers)
n‐type
(fullerene
nonfullerene))
are
classified
into
four
categories:
700–800
nm,
800–900
900–1000
greater
than
1000
nm.
Each
subsection
covers
design,
synthesis,
utilization
various
types
donor
(D)
acceptor
(A)
units.
structure–property
relationship
between
kinds
D,
A
units
window
constructed
satisfy
requirements
different
applications.
Subsequently,
variety
applications
realized
materials,
including
OPVs,
photodetectors,
presented.
Finally,
challenges
future
next‐generation
beyond
discussed.
Nature Communications,
Год журнала:
2021,
Номер
12(1)
Опубликована: Июль 30, 2021
Abstract
Unveiling
the
correlations
among
molecular
structures,
morphological
characteristics,
macroscopic
properties
and
device
performances
is
crucial
for
developing
better
photovoltaic
materials
achieving
higher
efficiencies.
To
achieve
this
goal,
a
comprehensive
study
performed
based
on
four
state-of-the-art
non-fullerene
acceptors
(NFAs),
which
allows
to
systematically
examine
above-mentioned
from
different
scales.
It’s
found
that
extending
conjugation
of
NFA
shows
positive
effects
charge
separation
promotion
non-radiative
loss
reduction,
while
asymmetric
terminals
can
maximize
benefits
both
terminals.
Another
optimization
alkyl
chain
tuning.
The
shortened
side
results
in
strengthened
terminal
packing
decreased
π-π
distance,
contribute
high
carrier
mobility
finally
collection
efficiency.
With
most-acquired
structure
factors,
PM6:BTP-S9-based
organic
photovoltaics
(OPVs)
exhibit
optimal
efficiency
17.56%
(certified:
17.4%)
with
fill
factor
78.44%,
representing
best
acceptor
OPVs.
This
work
provides
insight
into
structure-performance
relationships,
paves
way
toward
high-performance
OPVs
via
design.
Advanced Materials,
Год журнала:
2022,
Номер
35(9)
Опубликована: Дек. 20, 2022
All-polymer
organic
photovoltaic
(OPV)
cells
possessing
high
performance
and
mechanical
robustness
are
promising
candidates
for
flexible
wearable
devices.
However,
developing
photoactive
materials
with
good
properties
so
far
remains
challenging.
In
this
work,
a
polymer
donor
PBDB-TF
weight-average
molecular
weight
(Mw
)
is
introduced
to
enable
highly
efficient
all-polymer
OPV
featuring
excellent
reliability.
By
incorporating
the
high-Mw
as
third
component
into
PBQx-TF:PY-IT
blend,
bulk
heterojunction
morphology
finely
tuned
more
compact
π-π
stacking
distance,
affording
pathways
charge
transport
well
stress
dissipation.
Hence,
based
on
ternary
blend
film
demonstrate
maximum
power
conversion
efficiency
(PCE)
of
18.2%
an
outstanding
fill
factor
0.796.
The
cell
delivers
decent
PCE
16.5%
stability.
These
results
present
strategy
address
boost
cells.
Advanced Materials,
Год журнала:
2022,
Номер
34(33)
Опубликована: Июнь 29, 2022
Forming
an
ideal
bulk
heterojunction
(BHJ)
morphology
is
a
critical
issue
governing
the
photon
to
electron
process
in
organic
solar
cells
(OSCs).
Complementary
widely-used
blend
casting
(BC)
method
for
BHJ
construction,
sequential
(SC)
can
also
enable
similar
or
even
better
and
device
performance
OSCs.
Here,
BC
SC
methods
on
three
representative
donor:acceptor
(D:A)
blends
are
utilized,
that
is,
PM6:PC71
BM,
PM6:IT-4F
PM6:L8-BO.
Higher
power
conversion
efficiencies
(PCEs)
all
cases
by
taking
advantage
of
beneficial
from
processing
achieved,
champion
PCE
18.86%
(certified
as
18.44%)
based
PM6:L8-BO
reached,
representing
record
value
among
binary
The
observations
phase
separation
vertical
distribution
inspire
proposal
swelling-intercalation
phase-separation
model
interpret
evolution
during
processing.
Further,
segregation
found
deliver
improvement
via
affecting
charge
transport
collection
processes,
evidenced
D:A-ratio-dependent
photovoltaic
properties.
Besides,
OSCs
show
advantages
photostability
upscale
fabrication.
This
work
demonstrates
versatility
efficacy
BHJ-based
Energy & Environmental Science,
Год журнала:
2022,
Номер
15(2), С. 855 - 865
Опубликована: Янв. 1, 2022
Our
work
presents
a
study
on
the
working
mechanism
of
ternary
organic
photovoltaic
devices
based
non-fullerene
acceptors,
focusing
composition-dependent
optoelectronic
property
variations
in
blend
films
and
devices.
Advanced Functional Materials,
Год журнала:
2022,
Номер
32(18)
Опубликована: Янв. 22, 2022
Abstract
Balancing
the
charge
generation
and
recombination
constitutes
a
major
challenge
to
break
current
limit
of
organic
photovoltaics
(OPVs).
To
address
this
issue,
an
asymmetric
non‐fullerene
acceptor,
namely
AC9,
is
developed
high‐performance
OPV
with
champion
efficiency
18.43%
(18.1%
certified)
demonstrated.
This
represents
record
value
among
binary
OPVs.
Comprehensive
analysis
on
exciton
dissociation,
collection,
carrier
transport,
has
been
carried
out,
unveiling
that
improved
device
performance
AC9‐based
OPVs
originated
from
better
compromise
between
non‐radiative
recombination,
compared
corresponding
symmetric
ones.
work
provides
high‐performing
molecule
paves
way
for
through
molecular
design.
Advanced Energy Materials,
Год журнала:
2021,
Номер
11(11)
Опубликована: Янв. 27, 2021
Abstract
Semi‐transparent
organic
photovoltaics
(ST‐OPVs)
are
promising
solar
windows
for
building
integration.
Improving
the
light‐absorbing
selectivity,
that
is,
transmitting
visible
photons
while
absorbing
invisible
ones,
is
a
key
step
toward
high‐performance
ST‐OPV.
To
achieve
this
goal,
optical
properties
of
active
layer,
transparent
electrode,
and
capping
layer
comprehensively
tailored,
highly
efficient
ST‐OPV
with
good
selectivity
demonstrated.
First,
numerical
method
established
to
quantify
materials
devices,
based
on
which,
an
infrared
non‐fullerene
acceptor,
H3,
selected
among
large
pool
photo‐active
materials.
Second,
ultra‐smooth
thin
Ag
small
granule
size
developed
via
polyethylenimine
wetting,
which
alleviates
light
scattering
improves
electric
Finally,
as
guided
by
simulation,
TeO
2
deposited
top
ultra‐thin
further
improve
selectivity.
As
result,
utilization
efficiency
significantly
improved
3.95
±
0.02%
(best
≈4.06%),
color
rendering
index
76.85.
These
results
make
it
one
best
color‐neutral
ST‐OPVs.
This
work
stresses
importance
manipulating
