Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 22, 2024
Abstract
The
ideal
vertical
phase
separation
active
layer
morphology
is
crucial
for
the
photoelectric
conversion
of
organic
solar
cells.
In
this
work,
a
layer‐by‐layer
sequential
deposition
method
used
to
prepare
D18/L8‐BO‐based
cells
and
dual
additives
strategy
adopted
construct
layer.
Additive
DIM
regulates
crystallization
D18
layer,
additive
DIO
induces
L8‐BO
diffuse
into
interior
form
composition
distribution
with
large
donor/acceptor
interpenetrated
regions.
improvement
induced
by
promote
exciton
generation
dissociation,
shorten
charge
transfer
distance,
improve
carrier
dynamics.
With
improved
transport
performance
suppressed
recombination,
short‐circuit
current
density
fill
factor
D18/L8‐BO
quasi‐bulk
heterojunction
are
simultaneously,
power
efficiency
boosted
significantly
from
18.21%
19.59%.
Moreover,
photovoltaic
further
verified
in
D18/Y6
PM6/L8‐BO‐based
cells,
which
implies
generalizability
additive‐assisted
‐sequential
method.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(33)
Опубликована: Апрель 15, 2024
Abstract
The
doping
levels
of
conjugated
polymers
significantly
influence
their
conductivity,
energetics,
and
optical
properties.
Recently,
a
highly
conductive
n‐doped
polymer
called
poly
(3,7‐dihydrobenzo[1,2‐b:4,5‐b′]difuran‐2,6‐dione)
(poly(benzodifurandione),
n‐PBDF)
is
discovered,
opening
new
possibilities
for
n‐type
conducting
in
printed
electronics
other
fields.
Controlling
the
level
n‐PBDF
great
interest
due
to
its
wide
range
potential
applications.
Here
controlled
dedoping
redoping
reported
mechanistic
understating
such
process
provided.
Dedoping
occurs
through
electron
transfer
proton
capture,
wherein
ionic
dopants,
tris(4‐bromophenyl)ammoniumyl
hexachloroantimonate
(Magic
Blue),
exhibit
efficient
capture
ability
stronger
interaction
with
n‐PBDF,
resulting
high
efficiency.
Moreover,
chemically
dedoped
PBDF
can
be
redoped
using
various
proton‐coupled
agents.
By
manipulating
thin
films,
ranging
from
doped
states,
system
demonstrates
controllable
conductivity
five
orders
magnitude,
adjustable
properties,
energetics.
As
result,
these
characteristics
demonstrate
applications
organic
electrochemical
transistors
thermoelectrics.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(24)
Опубликована: Фев. 7, 2024
Abstract
For
organic
photodetectors
(OPDs),
cathode
interlayer
(CIL)
with
low‐lying
highest
occupied
molecular
orbital
(
E
HOMO
)
energy
level
is
required
to
reduce
dark
current
density
J
d
).
In
this
study,
toward
application
as
CIL
in
OPDs,
an
alcohol‐processable
n‐type
conjugated
polymer
(n‐PT8)
based
on
imide/cyano‐substituted
polythiophene
backbone
and
branched
oligo(ethylene
glycol)
side
chain
developed.
Owing
the
electron‐accepting
imide/cyano
groups
backbone,
n‐PT8
exhibits
deep‐lying
of
−5.80
eV
a
high
conductivity
5.12
×
10
−6
S
cm
−1
.
OPD
one
order
magnitude
lower
than
that
state‐of‐the‐art
material
because
large
barrier
for
reverse
hole
injection.
Moreover,
device
performance
insensitive
layer
thickness,
which
very
desirable
mass
production
OPDs.
The
near‐infrared
(NIR)
OPDs
exhibit
ultra‐low
1.76
−9
A
−2
specific
detectivity
2.88
12
Hz
1/2
W
at
V.
To
best
knowledge,
first
report
derivatives
opto‐electronic
devices.
ACS Energy Letters,
Год журнала:
2024,
Номер
9(9), С. 4209 - 4217
Опубликована: Авг. 1, 2024
Improving
the
uniformity
and
density
of
self-assembled
monolayers
(SAMs)
is
crucial
to
elevate
photovoltaic
performance
organic
solar
cells
(OSCs).
Herein,
we
introduced
small
molecules
1-hydroxybenzotriazole
(HOBT)
modulate
distribution
electrical
properties
(4-(7H-dibenzo[c,g]carbazol-7-yl)butyl)phosphonic
acid
(4PADCB)
on
indium
tin
oxide
(ITO)
transparent
electrodes
in
an
innovative
manner.
The
hydroxyl
group
HOBT
interacts
with
phosphate
SAMs,
while
steric
repulsion
exerted
by
backbone
efficiently
regulates
SAMs.
This
led
a
more
uniform
dense
SAMs
ITO.
Furthermore,
HOBT-modified
have
improved
crystallization
vertical
phase
separation
upper
active
layer.
Consequently,
PM6:BTP-eC9
binary
OSCs
based
exhibit
impressive
PCE
19.66%.
Our
work
presents
effective
strategy
for
regulating
SAM
morphology
offers
promising
approach
advancing
OSCs.
Journal of Physical Organic Chemistry,
Год журнала:
2024,
Номер
37(6)
Опубликована: Март 14, 2024
Abstract
The
field
of
organic
solar
cells
has
witnessed
notable
advancements
in
the
past
few
years,
mostly
due
to
development
novel
materials
for
active
layer.
current
investigations
reveal
potential
nine
previously
unexplored
molecules
(
TP1–TP9
)
designed
by
end
group
modification
TPT4F
molecule.
These
were
investigated
at
MPW1PW91/6‐31G
(d,
p)
with
DFT
and
TD‐DFT
approach
study
various
photovoltaic
geometrical
parameters.
results
obtained
through
computations
indicated
improvement
terminal
shifted
absorption
maximum
towards
longer
wavelength
UV‐visible
region.
Highly
conjugated
modified
acceptors
reduced
band
gap.
lower
excitation
energies
increased
rate
charge
transfer.
showed
improved
excited
state
lifetime
comparison
reference.
open
circuit
voltage
was
determined
using
PTB7
polymer,
which
exhibited
a
noticeable
improvement,
especially
TP1
(1.70
eV),
TP3
(1.75
TP4
(1.68
TP6
(1.85
TP7
eV)
when
compared
reference
(1.59
eV).
Moreover,
transfer
complex
performed
analyzing
concentration
over
molecular
orbitals,
that
is,
HOMO
LUMO.
All
preceding
targeted
achieve
high‐efficiency
altered
can
be
considered
effective
candidates
tackle
future
energy
problems.
Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 2, 2024
Abstract
M‐series
molecules
are
one
kind
of
promising
acceptor‐donor‐acceptor
(A‐D‐A)‐type
acceptors
for
constructing
high‐performance
organic
solar
cells
(OSCs).
However,
their
power
conversion
efficiencies
(PCEs)
lagging
behind
that
current
state‐of‐the‐art
OSCs,
limited
by
the
relatively
low
fill
factor
(FF)
and
photocurrent.
Herein,
combined
strategies
layer‐by‐layer
(LBL)
deposition
interface
engineering
conducted
to
systematically
improve
light
utilization
thus
PCEs
M36‐based
OSCs.
Through
choosing
a
proper
processing
solvent,
PCE
17.3%
with
an
FF
77.9%
is
achieved
resulting
LBL
devices,
much
higher
than
those
(15.9%/74.0%)
from
blend‐casting
devices.
The
improvement
assigned
favorable
morphological
evolution
facilitates
carrier
generation
transport
as
well
reduces
charge
recombination.
More
importantly,
light‐harvesting
active
layers
can
be
enhanced
upon
employing
self‐assembled
monolayer
(2‐(9H‐carbazol‐9‐yl)ethyl)phosphonic
acid
(2PACz)
instead
widely
used
PEDOT:PSS
hole‐selecting
layer,
due
decreased
parasitic
absorption
former.
Consequently,
2PACz‐based
devices
exhibit
significantly
increased
photocurrent,
affording
up
18.2%,
which
highest
among
reported
A‐D‐A‐type
acceptor‐based
These
results
deliver
important
enhance
performance
OSCs
highlight
great
potential
practical
applications.
Advanced Energy Materials,
Год журнала:
2024,
Номер
14(19)
Опубликована: Апрель 9, 2024
Abstract
Efficient
and
stable
hole
transport
layer
(HTL)
is
an
important
component
of
organic
photovoltaics
(OPV).
Herein,
a
novel
self‐assembled
monolayer
material
4PADCB
(short
for
(4‐(7H‐dibenzo[c,g]carbazol‐7‐yl)butyl)phosphonic
acid)
as
HTL
non‐fullerene
(NF)
OPV
reported.
Compared
to
the
widely
used
PEDOT:PSS
HTL,
usage
not
only
enhances
photon
incident
charge
generation
but
also
effectively
improves
morphology
upper
active
layer,
promotes
molecular
packing,
balances
carrier
within
layer.
As
result,
single‐junction
binary
D18:L8BO
OPV,
employing
achieves
high‐power
conversion
efficiency
(PCE)
19.02%
with
excellent
storage
stability.
Furthermore,
19.3
cm
2
module
comprising
seven
sub‐cells
demonstrates
maximum
PCE
15.44%,
which
highest
value
reported
large‐area
modules.
Meanwhile,
first
demonstration
based
on
material.
This
work
underscores
substantial
potential
application
in
efficient
NF
devices
high‐throughput
eScience,
Год журнала:
2024,
Номер
unknown, С. 100305 - 100305
Опубликована: Авг. 1, 2024
When
used
in
organic
solar
cells,
poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)
(PEDOT:PSS)
aligns
interfacial
energy
levels,
promotes
hole
extraction,
blocks
electrons,
and
optimizes
the
active
layer's
morphology.
However,
with
an
optimal
thickness
of
approximately
30–40
nm,
PEDOT:PSS
has
insufficient
layer
tolerance,
owing
to
its
low
conductivity
extraction
property.
Herein,
a
hole-selective-molecule
doping
strategy
is
proposed
enhance
properties
by
introducing
MPA2FPh-BT-BA
(abbreviated
as
2F)
into
layer.
2F
assembles
at
anode
form
dipoles
due
unique
donor–acceptor–anchor
molecular
configuration,
altering
work
function
hole-selective
extraction.
Additionally,
improves
aggregation
forming
hydrogen
bonds
PSS
group,
enhancing
characteristics.
These
changes
further
influence
overlaying
morphology,
leading
increased
crystalline
features
PM6
bulk
heterojunction
PM6:Y6.
2F-PEDOT:PSS
(2FPP)
used,
power
conversion
efficiencies
18.3%,
19.2%,
19.1%
are
achieved
PM6:Y6,
PM6:BTP-eC9,
PM6:L8-BO
devices,
respectively,
outperforming
counterparts
PEDOT:PSS.
Specifically,
performance
PM6:Y6
devices
2FPP
170
nm
remains
>15%,
providing
valuable
guidance
for
designing
thickness-insensitive
transport
high-efficiency
cells.
Energy & Environmental Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
We
present
a
method
for
fabricating
high-performance
ST-OSC
modules
incorporating
the
high
mobility
small
molecule
donor
BTR-Cl
into
active
layer
at
low
content,
demonstrating
potential
of
in
field
energy
conservation
and
environmental
protection.