ACS Materials Letters,
Journal Year:
2024,
Volume and Issue:
unknown, P. 376 - 384
Published: Dec. 25, 2024
Bilayer
organic
solar
cells,
composed
of
a
donor
and
acceptor
layer,
provide
independent
optimization
each
layer
to
enhance
the
photovoltaic
performance.
However,
power
conversion
efficiency
remains
lower
than
that
bulk
heterojunction
cells.
Herein,
we
focus
on
suppressing
nongeminate
charge
recombination
by
tuning
layer's
morphology
with
fullerene
derivatives
improve
performance
bilayer
We
use
PM6/Y6
as
model
systems
incorporate
fullerenes
such
PC71BM
into
aggregation,
crystallinity,
increase
electron
mobility,
reduce
trap
density.
Consequently,
devices
based
PM6/BTP-eC9
PM6/L8-BO
achieved
efficiencies
18.0%
19.5%,
respectively,
approaching
The
improved
fill
factor
results
from
reduced
bimolecular
suppressed
trap-assisted
recombination,
offering
insights
optimizing
active
designing
high-mobility
materials
for
efficient
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 30, 2024
Abstract
The
photomultiplication
type
organic
photodetectors
(PM‐OPDs)
are
prepared
with
structure
of
ITO/PNDIT‐F3N/F8BT/Y6‐1O:P3HT
(100:3,
wt/wt)/Al,
containing
hole
traps
formed
P3HT
surrounded
by
Y6‐1O
in
active
layers.
PM‐OPDs
exhibit
external
quantum
efficiency
(EQE)>100%
the
spectral
response
range
from
310
to
910
nm,
resulting
electron
tunneling
injection
assisted
trapped
near
ITO
electrode.
incorporation
F8BT
buffer
layers
can
induce
markedly
decreased
dark
current
density
(
J
D
)
due
large
barrier.
light
L
exhibits
slightly
inserting
enhanced
more
holes
signal‐to‐noise
ratio
(SNR)
achieves
over
40‐fold
increment
appropriate
thickness
layers,
and
reasonably
high
.
optimal
excellent
photodetection
capability
EQE
4200%
at
360
nm
6600%
850
associated
specific
detectivity
3.9
×
10
11
Jones
9.7
nm.
Energies,
Journal Year:
2024,
Volume and Issue:
17(16), P. 4022 - 4022
Published: Aug. 14, 2024
In
this
work,
layer-by-layer
organic
photovoltaics
(LbL
OPVs)
were
prepared
by
sequentially
spin-coating
PM1
and
L8-BO
solutions.
The
solvent
additive
1,8-diiodooctane
(DIO),
which
has
a
high
boiling
point,
solid
l,3,5-trichlorobenzene
(TCB),
volatile,
deliberately
selected
to
incorporate
with
the
power
conversion
efficiency
(PCE)
of
LbL
OPVs
was
considerably
enhanced
from
17.43%
18.50%
employing
TCB
as
additive,
profiting
concurrently
increased
short-circuit
current
density
(JSC)
26.74
mA
cm−2
fill
factor
(FF)
76.88%.
JSCs
ascribed
tilted-up
absorption
edge
in
long
wavelength
range
external
quantum-efficiency
spectral
difference
between
without
an
additive.
molecular
arrangement
domain
most
likely
responsible
for
charge
mobilities
layered
films
processed
additives.
It
indicated
that
dynamic
film-forming
process
acceptor
layers
plays
vital
role
achieving
efficient
strategy.
Over
6%
PCE
improvement
PM1/L8-BO
active
can
be
achieved
ACS Materials Letters,
Journal Year:
2024,
Volume and Issue:
unknown, P. 376 - 384
Published: Dec. 25, 2024
Bilayer
organic
solar
cells,
composed
of
a
donor
and
acceptor
layer,
provide
independent
optimization
each
layer
to
enhance
the
photovoltaic
performance.
However,
power
conversion
efficiency
remains
lower
than
that
bulk
heterojunction
cells.
Herein,
we
focus
on
suppressing
nongeminate
charge
recombination
by
tuning
layer's
morphology
with
fullerene
derivatives
improve
performance
bilayer
We
use
PM6/Y6
as
model
systems
incorporate
fullerenes
such
PC71BM
into
aggregation,
crystallinity,
increase
electron
mobility,
reduce
trap
density.
Consequently,
devices
based
PM6/BTP-eC9
PM6/L8-BO
achieved
efficiencies
18.0%
19.5%,
respectively,
approaching
The
improved
fill
factor
results
from
reduced
bimolecular
suppressed
trap-assisted
recombination,
offering
insights
optimizing
active
designing
high-mobility
materials
for
efficient
