Advanced Materials,
Год журнала:
2023,
Номер
36(20)
Опубликована: Авг. 25, 2023
Abstract
Over
the
past
three
years,
remarkable
advancements
in
organic
solar
cells
(OSCs)
have
emerged,
propelled
by
introduction
of
Y6—an
innovative
A‐DA'D‐A
type
small
molecule
non‐fullerene
acceptor
(NFA).
This
review
provides
a
critical
discussion
current
knowledge
about
structural
and
physical
properties
PM6:Y6
material
combination
relation
to
its
photovoltaic
performance.
The
design
principles
PM6
Y6
are
discussed,
covering
charge
transfer,
transport,
recombination
mechanisms.
Then,
authors
delve
into
blend
morphology
degradation
mechanisms
before
considering
commercialization.
state
art
is
presented,
while
also
discussing
unresolved
contentious
issues,
such
as
energetics,
pathways
free
generation,
role
triplet
states
recombination.
As
such,
this
aims
provide
comprehensive
understanding
potential
for
further
development
field
cells.
By
addressing
both
successes
challenges
associated
with
system,
contributes
ongoing
research
efforts
toward
achieving
more
efficient
stable
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.
Advanced Energy Materials,
Год журнала:
2021,
Номер
11(15)
Опубликована: Янв. 14, 2021
Abstract
Organic
solar
cells
are
composed
of
electron
donating
and
accepting
organic
semiconductors.
Whilst
a
significant
palette
donors
has
been
developed
over
three
decades,
until
recently
only
small
number
acceptors
have
proven
capable
delivering
high
power
conversion
efficiencies.
In
particular
the
fullerenes
dominated
landscape.
this
perspective,
emergence
family
materials–the
non‐fullerene
(NFAs)
is
described.
These
delivered
discontinuous
advance
in
cell
efficiencies,
with
milestone
20%
now
sight.
Intensive
international
efforts
synthetic
chemistry
established
clear
design
rules
for
molecular
engineering
enabling
an
ever‐expanding
efficiency
candidates.
However,
these
materials
challenge
accepted
wisdom
how
work
force
new
thinking
areas
such
as
morphology,
charge
generation
recombination.
This
perspective
provides
historical
context
development
NFAs,
also
addresses
current
plus
considers
important
manufacturability
criteria.
There
no
doubt
that
NFAs
propelled
technology
to
efficiencies
necessary
viable
commercial
technology–but
far
can
they
be
pushed,
will
deliver
on
equally
metrics
stability?
Advanced Materials,
Год журнала:
2021,
Номер
33(48)
Опубликована: Сен. 27, 2021
Controlling
the
self-assembling
of
organic
semiconductors
to
form
well-developed
nanoscale
phase
separation
in
bulk-heterojunction
active
layer
is
critical
yet
challenging
for
building
high-performance
solar
cells
(OSCs).
Particularly,
similar
anisotropic
conjugated
structures
between
nonfullerene
acceptors
and
p-type
semiconductor
donors
raise
more
complexity
on
manipulating
their
aggregation
toward
appropriate
separation.
Herein,
a
new
approach
tune
morphology
photoactive
developed
by
utilizing
synergistic
effect
dithieno[3,2-b:2',3'-d]thiophene
(DTT)
1-chloronaphthalene
(CN).
The
volatilizable
solid
additive
DTT
with
high
crystallinity
can
restrict
over
during
film
casting
process,
then
allowing
refining
molecular
packing
simultaneous
volatilization
under
thermal
annealing.
Consequently,
PTQ10:m-BTP-PhC6:PC71
BM-based
ternary
OSCs
processed
dual
additives
CN
record
notable
power-conversion
efficiency
18.89%,
remarkable
FF
80.6%.
Advanced Materials,
Год журнала:
2021,
Номер
33(23)
Опубликована: Апрель 29, 2021
Abstract
Side‐chain
engineering
has
been
an
effective
strategy
in
tuning
electronic
energy
levels,
intermolecular
interaction,
and
aggregation
morphology
of
organic
photovoltaic
materials,
which
is
very
important
for
improving
the
power
conversion
efficiency
(PCE)
solar
cells
(OSCs).
In
this
work,
two
D–A
copolymers,
PBQ5
PBQ6,
are
designed
synthesized
based
on
bithienyl‐benzodithiophene
(BDTT)
as
donor
(D)
unit,
difluoroquinoxaline
(DFQ)
with
different
side
chains
acceptor
(A)
thiophene
π‐bridges.
PBQ6
alkyl‐substituted
fluorothiophene
DFQ
units
possesses
redshifted
absorption,
stronger
higher
hole
mobility
than
alkyl
units.
The
blend
film
Y6
shows
balanced
hole/electron
mobilities,
less
charge
carrier
recombination,
more
favorable
morphology.
Therefore,
OSC
PBQ6:Y6
achieves
a
PCE
high
17.62%
fill
factor
77.91%,
significantly
(15.55%)
PBQ5:Y6‐based
OSC.
by
far
one
highest
efficiencies
binary
OSCs
polymer
acceptor.
Materials Chemistry Frontiers,
Год журнала:
2021,
Номер
5(8), С. 3257 - 3280
Опубликована: Янв. 1, 2021
This
review
provides
a
detailed
overview
of
PM6:Y6-based
organic
solar
cells
(OSCs),
including
the
underlying
mechanisms,
terpolymers
derived
from
PM6,
ternary
or
quaternary
OSCs,
interfacial
engineering
and
electrode
progress.
Angewandte Chemie International Edition,
Год журнала:
2021,
Номер
60(22), С. 12475 - 12481
Опубликована: Март 22, 2021
Abstract
Noncovalently
fused‐ring
electron
acceptors
(NFREAs)
have
attracted
much
attention
in
recent
years
owing
to
their
advantages
of
simple
synthetic
routes,
high
yields
and
low
costs.
However,
the
efficiencies
NFREAs
based
organic
solar
cells
(OSCs)
are
still
far
behind
those
(FREAs).
Herein,
a
series
with
S⋅⋅⋅O
noncovalent
intramolecular
interactions
were
designed
synthesized
two‐step
route.
Upon
introducing
π‐extended
end‐groups
into
backbones,
electronic
properties,
charge
transport,
film
morphology,
energy
loss
precisely
tuned
by
fine‐tuning
degree
multi‐fluorination.
As
result,
record
PCE
14.53
%
labs
certified
13.8
for
devices
obtained.
This
contribution
demonstrated
that
combining
strategies
conformational
locks
end‐group
engineering
is
effective
way
explore
high‐performance
NFREAs.
Advanced Functional Materials,
Год журнала:
2022,
Номер
32(35)
Опубликована: Июль 5, 2022
Abstract
Symmetric
conjugated
molecules
can
be
broken
through
suitable
synthetic
strategies
to
construct
novel
asymmetric
molecules,
which
largely
broaden
the
material
library.
In
field
of
organic
solar
cells,
fused‐ring
electron
acceptors
(FREAs)
with
A‐DA'D‐A
type
backbone
structure
have
attracted
much
attention
and
enabled
power
conversion
efficiencies
(PCE)
exceeding
18%.
Among
them,
Y6
is
one
most
classic
FREAs
that
derive
many
symmetric
exhibit
unique
optoelectronic
properties.
Thus,
in
this
review,
focus
on
recent
progress
Y6‐derived
containing
a
dipyrrolobenzothiadiazole
segment,
classified
as
following
three
categories:
end
group,
central
core
side
chain.
The
relationship
molecular
structure,
properties,
device
performance
discussed
detail.
Finally,
future
design
directions
challenges
faced
by
kind
photovoltaic
materials
are
given.
