Angewandte Chemie,
Год журнала:
2024,
Номер
136(18)
Опубликована: Март 9, 2024
Abstract
The
hole‐transporting
material
(HTM),
poly
(3,4‐ethylene
dioxythiophene)
poly(styrene
sulfonate)
(PEDOT
:
PSS),
is
the
most
widely
used
in
realization
of
high‐efficiency
organic
solar
cells
(OSCs).
However,
stability
PEDOT
PSS‐based
OSCs
quite
poor,
arising
from
its
strong
acidity
and
hygroscopicity.
In
addition,
PSS
has
an
absorption
infrared
region
high
highest
occupied
molecular
orbital
(HOMO)
energy
level,
thus
limiting
enhancement
short‐circuit
current
density
(
J
sc
)
open‐circuit
voltage
V
oc
),
respectively.
Herein,
two
asymmetric
self‐assembled
molecules
(SAMs),
namely
BrCz
BrBACz,
were
designed
synthesized
as
HTM
binary
based
on
well‐known
system
PM6
Y6,
eC9,
L8‐BO,
D18
eC9.
Compared
with
BrCz,
BrBACz
shows
larger
dipole
moment,
deeper
work
function
lower
surface
energy.
Moreover,
not
only
enhances
photon
harvesting
active
layer,
but
also
minimizes
losses
well
improves
interface
charge
extraction/
transport.
Consequently,
eC9‐based
OSC
using
exhibits
a
champion
efficiency
19.70
%
remarkable
29.20
mA
cm
−2
0.856
V,
which
record
for
so
far.
unencapsulated
device
maintains
95.0
original
after
1,000
hours
storage
at
air
ambient,
indicating
excellent
long‐term
stability.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
64(1)
Опубликована: Авг. 17, 2024
A
novel
class
of
thienyltriazine
triamides
(TTTAs)
was
facile
synthesized
and
firstly
used
as
cathode
interlayers
(CILs)
for
organic
solar
cells
(OSCs).
By
utilizing
different
aromatic
arms
pendant
polar
groups,
their
optoelectronic
properties
aggregation
behaviors
were
effectively
modulated.
The
combination
(TT)
core,
naphthylamide
arm
imidazole
group
endows
TT-N-M
with
suitable
energy
levels,
intensified
work
function
tunability,
higher
conductivity,
well-balanced
crystallinity
film-forming
ability,
boosting
both
the
performance
stability
OSCs
significantly.
Remarkably,
cell
efficiency
remains
stable
at
around
90
%
optimal
even
interlayer
thickness
varied
from
5
to
95
nm,
demonstrating
its
insensitivity
thickness.
Moreover,
exhibits
compatibility
various
active
layer
systems,
achieving
a
maximum
19.60
single-junction
cell.
Its
exceptional
tolerance
fluctuations
establishes
new
benchmark
multi-armed
CIL-based
OSCs,
also
positioning
them
among
most
high-performing
CIL
materials
documented
thus
far.
This
not
only
broadens
scope
but
offers
deep
insights
into
design
strategies
structure-properties
relationships,
being
beneficial
future
development
more
efficient
applications.
Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 12, 2024
Abstract
To
enhance
the
performance
of
dimeric
acceptors
(DMAs)
based
organic
solar
cells
(OSCs),
two
new
DMAs,
designated
as
DC9‐HD
and
DYSe‐3,
are
rationally
developed
employed
to
fabricate
ternary
OSCs.
The
substitution
sulfur
atom
on
outer
ring
fused‐ring
core
with
a
selenium
resultes
in
red‐shifted
DYSe‐3.
Despite
these
minor
differences,
DYSe‐3
possess
nearly
identical
conjugated
skeletons,
which
contribute
their
similar
packing
motifs
crystallinities,
ultimately
enabling
high
degree
miscibility
between
DMAs.
Upon
incorporating
into
host
PM6:DC9‐HD
binary
blend,
fibril‐like
morphologies
featured
diameters
≈16.9
nm
reduced
charge
recombination
observed
PM6:DC9‐HD:DYSe‐3
blend.
More
importantly,
owing
long
exciton
diffusion
lengths
low
voltage
losses,
remarkable
power
conversion
efficiency
19.4%
is
achieved
for
OSCs,
alongside
delicate
balance
open‐circuit
short‐circuit
current
density.
This
super
result
comparable
best
oligomer
acceptor
OSCs
reported
date.
Furthermore,
proposed
strategy,
combines
one
polymer
donor
well‐compatible
not
only
retains
advantages
DMAs
but
also
offers
streamlined
approach
fabricating
high‐performance
Angewandte Chemie,
Год журнала:
2024,
Номер
136(18)
Опубликована: Март 9, 2024
Abstract
The
hole‐transporting
material
(HTM),
poly
(3,4‐ethylene
dioxythiophene)
poly(styrene
sulfonate)
(PEDOT
:
PSS),
is
the
most
widely
used
in
realization
of
high‐efficiency
organic
solar
cells
(OSCs).
However,
stability
PEDOT
PSS‐based
OSCs
quite
poor,
arising
from
its
strong
acidity
and
hygroscopicity.
In
addition,
PSS
has
an
absorption
infrared
region
high
highest
occupied
molecular
orbital
(HOMO)
energy
level,
thus
limiting
enhancement
short‐circuit
current
density
(
J
sc
)
open‐circuit
voltage
V
oc
),
respectively.
Herein,
two
asymmetric
self‐assembled
molecules
(SAMs),
namely
BrCz
BrBACz,
were
designed
synthesized
as
HTM
binary
based
on
well‐known
system
PM6
Y6,
eC9,
L8‐BO,
D18
eC9.
Compared
with
BrCz,
BrBACz
shows
larger
dipole
moment,
deeper
work
function
lower
surface
energy.
Moreover,
not
only
enhances
photon
harvesting
active
layer,
but
also
minimizes
losses
well
improves
interface
charge
extraction/
transport.
Consequently,
eC9‐based
OSC
using
exhibits
a
champion
efficiency
19.70
%
remarkable
29.20
mA
cm
−2
0.856
V,
which
record
for
so
far.
unencapsulated
device
maintains
95.0
original
after
1,000
hours
storage
at
air
ambient,
indicating
excellent
long‐term
stability.
