Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(19)
Published: Dec. 29, 2023
Abstract
The
passivation
of
perovskite
interfacial
defects
by
the
electron
transport
layer
(ETL)
has
emerged
as
an
effective
strategy
for
enhancing
performance
solar
cells
(PSCs).
Dithieno[2,3‐d:2′,3′‐d′]thieno[3,2‐b:3′,2′‐b′]dipyrrole
(DTPT)‐based
acceptor‐donor‐acceptor
(A–D–A)
molecules
composed
coplanar
heteroacene
electron‐donating
core
end‐capped
with
various
electron‐accepting
moieties
are
designed
and
examined
ETL
modifiers
PSCs.
Employing
PCBM:DTPTCY
results
in
defects,
facilitation
energy
alignment
at
ETL/perovskite
interface,
enhancement
carrier
efficiency.
optimized
blended
ETL‐based
Cs
0.18
FA
0.82
Pb(I
0.8
Br
0.2
)
3
p‐i‐n
PSC
exhibit
performances
37.2%
39.9%
under
TL84
3000K
LED
(1000
lux),
respectively.
DTPTCY‐based
device
demonstrates
remarkable
stability,
retaining
87%
its
initial
power
conversion
efficiency
(PCE)
after
30
days
storage
a
40%
relative
humidity
(RH)
ambient
air
environment
without
any
encapsulation,
surpassing
control
device,
which
retains
only
67%
original
PCE.
These
findings
underscore
potential
A–D–A‐type
molecule‐based
interface
modification
to
enhance
contact
properties,
ultimately
leading
high‐efficiency
stable
ACS Energy Letters,
Journal Year:
2022,
Volume and Issue:
7(8), P. 2845 - 2855
Published: Aug. 3, 2022
A
ternary
strategy
has
been
considered
to
be
a
simple
and
efficient
method
further
improve
the
performance
of
organic
solar
cells
(OSCs).
Here,
three
benzotriazole-based
nonfullerene
acceptors
(NFAs)
with
similar
A2-A1-D-A1-A2
backbones
except
for
different
terminal
groups,
are
utilized
as
guest
components
classic
PM6:BTP-BO-4F
binary
host.
Excitingly,
BTA1–3
all
realize
much
better
photovoltaic
in
devices
minimized
energy
loss
(Eloss)
improved
open-circuit
voltage
(VOC),
suggesting
that
it
is
bridge
A1
unit
plays
decisive
role.
Additionally,
short-circuit
current
density
(JSC)
fill
factor
(FF)
BTA2-/BTA3-incorporated
can
enhanced
simultaneously,
resulting
from
more
photon
harvesting,
increased
exciton
dissociation,
charge
transport,
reduced
recombination.
The
highest
efficiency
18.27%
obtained
BTA2
device,
one
top
values
PM6-based
OSCs.
This
work
suggests
type
NFAs
effective
improving
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(8)
Published: Jan. 6, 2023
Organic
photovoltaics
(OPV)
has
been
considered
for
a
long
time
promising
emerging
solar
technology.
Currently,
however,
market
shares
of
OPV
are
practically
non-existent.
A
detailed
meta-analysis
the
literature
published
until
mid-2021
is
presented,
focusing
on
one
remaining
issues
that
need
to
be
addressed
translate
recent
remarkable
progress,
obtained
in
devices'
performance
at
lab-scale
level,
into
requirements
able
boost
manufacturing-scale
production.
Namely,
active
layer's
thickness
referred
to,
which,
together
with
device
efficiency
and
stability,
represents
biggest
challenges
this
technological
research
field.
Papers
describing
cells
containing
non-fullerene
acceptor
(NFA)
binary
ternary
blends,
as
well
NFA
plus
fullerene
(FA)
blends
reviewed.
The
common
ground
all
analyzed
devices
their
high-thickness
layers,
compatible
large-area
deposition
techniques.
By
defining
new
figure
merit
discuss
(thickness
tolerance,
TT),
it
found
parameter
not
affected
by
chemical
family's
nature
blend
components.
On
other
hand,
analysis
suggests
there
strategies
improve
TT,
which
discussed
conclusion
section.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(19)
Published: Dec. 29, 2023
Abstract
The
passivation
of
perovskite
interfacial
defects
by
the
electron
transport
layer
(ETL)
has
emerged
as
an
effective
strategy
for
enhancing
performance
solar
cells
(PSCs).
Dithieno[2,3‐d:2′,3′‐d′]thieno[3,2‐b:3′,2′‐b′]dipyrrole
(DTPT)‐based
acceptor‐donor‐acceptor
(A–D–A)
molecules
composed
coplanar
heteroacene
electron‐donating
core
end‐capped
with
various
electron‐accepting
moieties
are
designed
and
examined
ETL
modifiers
PSCs.
Employing
PCBM:DTPTCY
results
in
defects,
facilitation
energy
alignment
at
ETL/perovskite
interface,
enhancement
carrier
efficiency.
optimized
blended
ETL‐based
Cs
0.18
FA
0.82
Pb(I
0.8
Br
0.2
)
3
p‐i‐n
PSC
exhibit
performances
37.2%
39.9%
under
TL84
3000K
LED
(1000
lux),
respectively.
DTPTCY‐based
device
demonstrates
remarkable
stability,
retaining
87%
its
initial
power
conversion
efficiency
(PCE)
after
30
days
storage
a
40%
relative
humidity
(RH)
ambient
air
environment
without
any
encapsulation,
surpassing
control
device,
which
retains
only
67%
original
PCE.
These
findings
underscore
potential
A–D–A‐type
molecule‐based
interface
modification
to
enhance
contact
properties,
ultimately
leading
high‐efficiency
stable
