Advanced Functional Materials,
Год журнала:
2022,
Номер
32(43)
Опубликована: Авг. 15, 2022
Abstract
Organic
photovoltaics
(OPVs)
have
demonstrated
increasing
potential
for
use
in
large‐area,
flexible,
and
light‐weight
applications.
To
date,
the
rapid
development
of
nonfullerene
acceptors
(NFAs)
their
conjugated
polymeric
donors
increased
efficiency
OPV
by
over
19%.
Nevertheless,
is
still
suffering
from
high
energy
loss,
which
primarily
derives
donor
(D)/acceptor
(A)
interfacial
charge
recombination.
In
particular,
voltage
loss
occurring
at
D/A
interface
accounts
current
bottleneck,
hampering
further
enhancement
efficiency.
this
review,
recent
discovery
photophysics
NFA‐based
OPVs,
including
comparison
with
its
fullerene‐based
counterpart,
covered.
Additionally,
factors
governing
such
as
energetics
local
morphologies,
causes
trade‐off
relationship
between
photovoltage
photocurrent
are
highlighted.
Accordingly,
control
properties
to
create
an
“ideal”
generation
OPVs
reviewed;
emphasized
that
modifications
can
serve
a
powerful
tool
manage
challenges
path
toward
future
practical
Chemical Reviews,
Год журнала:
2022,
Номер
122(18), С. 14180 - 14274
Опубликована: Авг. 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.
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:
2020,
Номер
32(32)
Опубликована: Июнь 25, 2020
Abstract
With
developments
in
materials,
thin‐film
processing,
fine‐tuning
of
morphology,
and
optimization
device
fabrication,
the
performance
organic
solar
cells
(OSCs)
has
improved
markedly
recent
years.
Designing
low‐bandgap
materials
been
a
focus
order
to
maximize
energy
conversion.
However,
there
are
only
few
successful
donor
developed
with
near‐infrared
(NIR)
absorption
that
well
matched
existing
efficient
acceptors.
Porphyrin
shown
great
potential
as
useful
building
block
for
constructing
due
its
large
conjugated
plane
strong
absorption.
Porphyrin‐based
have
contribute
many
record‐high
efficiencies
small
molecule,
tandem,
ternary,
flexible,
OSC/perovskite
hybrid
cells.
Specifically,
non‐fullerene
small‐molecule
recently
high
power
conversion
efficiency
12%
using
porphyrin.
All
these
validated
porphyrin
derivatives
effective
made
DPPEZnP‐TRs
family
best
OSC
field
so
far.
Here,
progress
rational
design,
dynamics,
multi‐functional
applications
starting
from
2015
will
be
highlighted
deepen
understanding
structure–property
relationship.
Finally,
some
future
directions
porphyrin‐based
OSCs
presented.
Nature Communications,
Год журнала:
2020,
Номер
11(1)
Опубликована: Фев. 11, 2020
Abstract
Organic
photovoltaics
based
on
non-fullerene
acceptors
(NFAs)
show
record
efficiency
of
16
to
17%
and
increased
photovoltage
owing
the
low
driving
force
for
interfacial
charge-transfer.
However,
potentially
slows
down
charge
generation,
leading
a
tradeoff
between
voltage
current.
Here,
we
disentangle
intrinsic
charge-transfer
rates
from
morphology-dependent
exciton
diffusion
series
polymer:NFA
systems.
Moreover,
establish
influence
energetics
electron
hole
transfer
separately.
We
demonstrate
that
timescales
remain
at
few
hundred
femtoseconds
even
near-zero
force,
which
is
consistent
with
predicted
by
Marcus
theory
in
normal
region,
moderate
electronic
coupling
re-organization
energy.
Thus,
design
highly
efficient
devices,
energy
offset
donor:acceptor
interface
can
be
minimized
without
jeopardizing
rate
concerns
about
current-voltage
tradeoff.
Journal of Materials Chemistry A,
Год журнала:
2019,
Номер
7(32), С. 18889 - 18897
Опубликована: Янв. 1, 2019
This
work
discussed
the
effect
of
energy-level
offset
on
photovoltaic
performance
PBDB-TF-based
non-fullerene
OSCs
and
established
a
correlation
between
them.
