Chemical Science,
Год журнала:
2021,
Номер
12(42), С. 14083 - 14097
Опубликована: Янв. 1, 2021
The
concurrent
enhancement
of
short-circuit
current
(JSC)
and
open-circuit
voltage
(VOC)
is
a
key
problem
in
the
preparation
efficient
organic
solar
cells
(OSCs).
In
this
paper,
we
report
stable
OSCs
based
on
an
asymmetric
non-fullerene
acceptor
(NFA)
IPC-BEH-IC2F.
NFA
consists
weak
electron-donor
core
dithienothiophen[3,2-b]-pyrrolobenzothiadiazole
(BEH)
two
kinds
strong
electron-acceptor
(A)
units
[9H-indeno[1,2-b]pyrazine-2,3-dicarbonitrile
(IPC)
with
tricyclic
fused
system
2-(5,6-difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile
(IC2F)].
For
comparison,
symmetric
NFAs
IPC-BEH-IPC
IC2F-BEH-IC2F
were
characterised.
kind
flanking
A
unit
significantly
affects
light
absorption
features
electronic
structures
NFAs.
IPC-BEH-IC2F
has
highest
extinction
coefficient
among
three
owing
to
its
dipole
moment
highly
crystalline
feature.
Its
occupied
molecular
orbital
(HOMO)
lowest
unoccupied
(LUMO)
levels
lie
between
those
molecules.
IPC
group
also
promotes
packing
through
π-conjugated
achieves
increased
crystallinity
compared
that
IC2F
group.
Inverted-type
photovoltaic
devices
p-type
polymer:NFA
blends
PBDB-T
PM6
polymers
as
fabricated.
Among
all
these
devices,
PBDB-T:IPC-BEH-IC2F
blend
device
displayed
best
properties
because
provides
balanced
morphological
characteristics.
More
importantly,
PBDB-T:IPC-BEH-IC2F-based
exhibited
long-term
stability
strongly
interacting
moiety
densely
packed
film.
These
results
demonstrate
structural
modifications
are
effective
way
for
simultaneously
improving
performance
OSCs.
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(14)
Опубликована: Янв. 22, 2023
Abstract
With
the
emergence
of
ADA'DA‐type
(Y‐series)
non‐fullerene
acceptors
(NFAs),
power
conversion
efficiencies
(PCEs)
organic
photovoltaic
devices
have
been
constantly
refreshed
and
gradually
reached
20%
in
recent
years
(19%
for
single
junction
tandem
device).
The
possess
specific
design
concept,
which
greatly
enrich
NFA
types
excellent
compatibility
with
many
donor
materials.
It
is
gratifying
to
note
that
previously
underperforming
materials
combine
these
regulated
shine
again.
Nowadays,
concept
modular
widely
used
research
donors,
injecting
new
vitality
into
field
photovoltaics.
Furthermore,
also
promote
multicomponent
devices,
bilayer
processing
solvent
engineering,
additive
engineering.
Herein,
latest
progresses
polymer
solar
cells
efficiency
over
17%
are
briefly
reviewed
from
aspects
active
material
design,
interface
development,
device
technology.
At
last,
opportunities
challenges
commercialization
future
discussed.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(21)
Опубликована: Фев. 22, 2024
All-polymer
solar
cells
(all-PSCs)
have
been
regarded
as
one
of
the
most
promising
candidates
for
commercial
applications
owing
to
their
outstanding
advantages
such
mechanical
flexibility,
light
weight
and
stable
film
morphology.
However,
compared
large
amount
new-emerging
excellent
polymer
acceptors,
development
high-performance
donor
lags
behind.
Herein,
a
new
D-π-A
type
donor,
namely
QQ1,
was
developed
based
on
dithienoquinoxalineimide
(DTQI)
A
unit,
benzodithiophene
with
thiophene-conjugated
side
chains
(BDTT)
D
alkyl-thiophene
π-bridge,
respectively.
QQ1
not
only
possesses
strong
dipole
moment,
but
also
shows
wide
band
gap
1.80
eV
deep
HOMO
energy
level
-5.47
eV,
even
without
halogen
substituents
that
are
commonly
indispensable
donors.
When
blended
classic
acceptor
PY-IT,
QQ1-based
all-PSC
delivers
an
PCE
18.81
%.
After
introduction
F-BTA3
third
component,
record
19.20
%
obtained,
highest
value
reported
so
far
all-PSCs.
The
impressive
photovoltaic
performance
originates
from
broad
absorption
range,
reduced
loss,
compact
π-π
stacking.
These
results
provide
insight
in
rational
design
novel
nonhalogenated
donors
further
Advanced Materials,
Год журнала:
2023,
Номер
35(24)
Опубликована: Март 17, 2023
High
power
conversion
efficiency
(PCE)
and
stretchability
are
the
dual
requirements
for
wearable
application
of
polymer
solar
cells
(PSCs).
However,
most
efficient
photoactive
films
mechanically
brittle.
In
this
work,
highly
(PCE
=
18%)
robust
(crack-onset
strain
(COS)
PSCs
acheived
by
designing
block
copolymer
(BCP)
donors,
PM6-b-PDMSx
(x
5k,
12k,
19k).
these
BCP
stretchable
poly(dimethylsiloxane)
(PDMS)
blocks
covalently
linked
with
PM6
to
effectively
increase
stretchability.
The
donors
increases
a
longer
PDMS
block,
PM6-b-PDMS19k
:L8-BO
PSC
exhibits
high
PCE
(18%)
9-times
higher
COS
value
compared
that
(COS
2%)
PM6:L8-BO-based
PSC.
PM6:L8-BO:PDMS12k
ternary
blend
shows
inferior
(5%)
(1%)
due
macrophase
separation
between
active
components.
intrinsically
PSC,
significantly
greater
mechanical
stability
PCE80%
((80%
initial
PCE)
at
36%
strain)
than
those
PM6:L8-BO
(PCE80%
12%
PM6:L8-BO:PDMS
4%
strain).
This
study
suggests
an
effective
design
strategy
PD
achieve
PSCs.
Energy & Environmental Science,
Год журнала:
2024,
Номер
17(10), С. 3365 - 3374
Опубликована: Янв. 1, 2024
A
strong
electron-deficient
unit
CNPz
as
a
solid
additive
was
developed
in
PTQ10/
m
-BTP-PhC6
binary
organic
solar
cells.
high
PCE
of
19.67%
achieved
with
significant
increase
the
J
SC
and
FF
(81.8%).
Energy & Environmental Science,
Год журнала:
2021,
Номер
14(10), С. 5530 - 5540
Опубликована: Янв. 1, 2021
A
donor
polymer
based
on
3-cyanothiophene,
a
structurally
simple
unit,
is
synthesized
for
organic
solar
cells,
which
exhibited
prominent
power
conversion
efficiency
and
excellent
batch-to-batch
reproducibility
in
wide
molecular
weight
range.
Energy & Environmental Science,
Год журнала:
2021,
Номер
14(11), С. 5919 - 5928
Опубликована: Янв. 1, 2021
This
study
demonstrates
that
the
solubility
properties
of
polymer
donors
are
vitally
important
for
layer-by-layer
processed
organic
solar
cells.
Manipulating
an
NTI-based
donor
enables
17.59%
efficiency
a
PNTB6-Cl:N3
based
device.
Advanced Functional Materials,
Год журнала:
2021,
Номер
32(8)
Опубликована: Ноя. 8, 2021
Abstract
Recently,
a
random
ternary
copolymerization
strategy
has
become
promising
and
efficient
approach
to
develop
high‐performance
polymer
donors
for
solar
cells
(PSCs).
In
this
study,
low‐cost
electron‐withdrawing
unit,
2,5‐bis(4‐(2‐ethylhexyl)thiophen‐2‐yl)pyrazine
(PZ‐T),
is
incorporated
into
the
backbone
of
PM6
as
third
component,
three
D‐A
1
‐D‐A
2
type
terpolymers
PMZ‐10,
PMZ‐20,
PMZ‐30
are
synthesized
by
strategy,
with
PZ‐T
proportion
10%,
20%,
30%,
respectively.
The
exhibit
downshifted
highest
occupied
molecular
orbital
energy
levels
than
PM6,
which
beneficial
obtaining
higher
open‐circuit
voltage
(
V
oc
)
PSCs
donor.
Importantly,
based
on
PMZ‐10:Y6
demonstrate
exciton
dissociation,
balanced
electron/hole
mobilities,
desirable
aggregation,
high
power
conversion
efficiency
18.23%,
among
terpolymer‐based
so
far.
results
indicate
that
second
A‐unit
an
further
improve
photovoltaic
performance
reduce
synthetic
cost
copolymer
donors.
