ACS Energy Letters,
Год журнала:
2023,
Номер
8(10), С. 4104 - 4112
Опубликована: Сен. 11, 2023
Molecular
doping
has
become
a
valuable
technique
for
enhancing
the
efficiency
of
high-performance
organic
photovoltaic
systems
(OPVs).
However,
number
known
dopant
molecules,
especially
n-type
ones,
that
enhance
PCE
OPVs
remains
limited.
In
this
study,
two
dopants,
ethyl
viologen
(EV)
and
methyl
(MV),
are
synthesized
incorporated
into
ternary
PM6:BTP-eC9:PC71BM
bulk
heterojunction
(BHJ)
OPVs.
Both
dopants
found
to
OPV
performance,
yielding
maximum
values
19.03%
18.61%,
respectively.
We
show
EV
MV
function
as
microstructure
modifiers,
π–π
stacking
while
increasing
absorption
coefficient
BHJs.
Moreover,
n-doping
balances
carrier
mobility
lifetime
reducing
bimolecular
recombination.
Our
results
demonstrate
potential
improve
performance
highly
efficient
levels
beyond
those
achievable
by
pristine
BHJ.
Journal of Materials Chemistry A,
Год журнала:
2023,
Номер
11(22), С. 11755 - 11766
Опубликована: Янв. 1, 2023
An
analysis
is
provided
of
MA-free
Sn/Pb-perovskite
solar
cells
fabricated
using
PEDOT:PSS,
2PACz,
and
Br-2PACz
as
the
HTL.
efficiency
19.51%
has
been
reached
by
with
improved
device
stability,
thanks
to
suppressed
recombination.
Advanced Functional Materials,
Год журнала:
2023,
Номер
34(50)
Опубликована: Авг. 13, 2023
Abstract
Recently,
carbazole‐based
self‐assembled
monolayers
(SAMs)
have
been
utilized
as
hole
transport
layers
(HTLs)
in
perovskite
solar
cells.
However,
their
application
Sn
or
mixed
Sn/Pb
cells
has
hindered
by
the
poor
wettability
of
precursor
solution
on
carbazole
surface.
Here
a
bilayer
(SAB)
comprising
covalent
monolayer
(Br‐2PACz)
and
noncovalent
wetting
layer
(4CzNH
3
I)
HTL
Cs
0.25
FA
0.75
0.5
Pb
I
cell
is
proposed.
It
demonstrated
that
completely
solves
problem
due
to
higher
polarity
surface
and,
furthermore,
ammonium
groups
help
passivation
trap
states
at
buried
SAB/perovskite
interface.
The
introduction
SAB
enhances
device
reproducibility
with
an
average
efficiency
18.98
±
0.28%
(19.45%
for
best
device),
compared
11.54
9.36%
(19.34%
device)
SAM‐only
devices.
Furthermore,
improved
processability
helps
increase
larger
size
device,
where,
12.5%
0.8
cm
2
active
area
0.68%
SAM‐based
demonstrated.
Finally,
device's
operational
stability
also
358
hours
(T
80%
),
220
cell.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(18)
Опубликована: Март 9, 2024
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
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(50)
Опубликована: Авг. 21, 2023
Abstract
Organic
solar
cells
(OSCs)
are
a
promising
photovoltaic
technology
that
employs
organic
semiconductor
material
as
the
photoactive
layer,
which
has
unique
advantages
of
light
weight,
large‐area
flexible
fabrication,
low‐cost,
and
semitransparent.
In
recent
years,
performance
OSCs
been
significantly
improved,
highest
power
conversion
efficiency
exceeded
19%.
Despite
tremendous
progress
in
OSCs,
major
bottleneck
realizing
commercialization
is
device
stability.
Therefore,
reviewing
research
on
stability
high‐performance
urgent
necessary.
This
review
discusses
factors
limiting
lifetime,
such
metastable
morphology,
air,
irradiation,
heat,
mechanical
stresses.
Additionally,
this
presents
over
last
5
focusing
enhancing
from
perspective
layers
other
functional
layers,
includes
design
engineering,
solid
additives,
optimizing
buffer
using
stable
electrodes,
encapsulation.
Lastly,
explores
current
challenges
prospects,
including
advanced
machine
learning
techniques
to
assist
experimental
research.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(20), С. 14287 - 14296
Опубликована: Май 8, 2024
PEDOT:PSS
has
been
widely
used
as
a
hole
extraction
layer
(HEL)
in
organic
solar
cells
(OSCs).
However,
their
acidic
nature
can
potentially
corrode
the
indium
tin
oxide
(ITO)
electrode
over
time,
leading
to
adverse
effects
on
longevity
of
OSCs.
Herein,
we
have
developed
class
biphosphonic
acid
molecules
with
tunable
dipole
moments
for
self-assembled
monolayers
(SAMs),
namely,
3-BPIC(i),
3-BPIC,
and
3-BPIC-F,
which
exhibit
an
increasing
moment
sequence.
Compared
centrosymmetric
axisymmetric
3-BPIC
3-BPIC-F
higher
adsorption
energies
(Eads)
ITO,
shorter
interface
spacing,
more
uniform
coverage
ITO
surface,
better
interfacial
compatibility
active
layer.
Thanks
incorporation
fluorine
atoms,
exhibits
deeper
highest
occupied
molecular
orbital
(HOMO)
energy
level
larger
compared
resulting
enlarged
work
function
(WF)
ITO/3-BPIC-F
substrate.
These
advantages
could
not
only
improve
within
device
but
also
lower
impedance
reduce
nonradiative
recombination
at
interface.
As
result,
OSCs
using
SAM
based
obtained
record
high
efficiency
19.71%,
is
than
that
achieved
from
3-BPIC(i)
(13.54%)
(19.34%).
Importantly,
3-BPIC-F-based
significantly
enhanced
stability
utilizing
HEL.
Our
offers
guidance
future
design
functional
SAMs
realize
even
performance
cells.
Advanced Materials,
Год журнала:
2024,
Номер
36(33)
Опубликована: Июнь 21, 2024
Abstract
Self‐assembled
molecules
(SAMs)
have
shown
great
potential
in
the
application
of
optoelectronic
devices
due
to
their
unique
molecular
properties.
Recently,
emerging
phosphonic
acid‐based
SAMs,
2‐(9Hcarbazol‐9‐yl)ethyl]phosphonic
acid
(2PACz),
successfully
applied
perovskite
solar
cells
(PSCs),
organic
(OSCs)
and
light
emitting
diodes
(PeLEDs).
More
importantly,
impressive
results
based
on
2PACz
SAMs
are
reported
recently
succession.
Therefore,
it
is
essential
provide
an
insightful
summary
promote
further
development.
In
this
review,
molecule
design
strategies
about
first
concluded.
Subsequently,
work
systematically
reviews
recent
advances
its
derivatives
for
single
junction
PSCs,
tandem
OSCs
PeLEDs.
Finally,
concludes
discusses
future
challenges
develop
devices.
Advanced Functional Materials,
Год журнала:
2021,
Номер
32(5)
Опубликована: Окт. 20, 2021
Abstract
Device
engineering
is
an
effective
way
to
improve
the
photovoltaic
performance
of
organic
solar
cells
(OSCs).
Currently,
widely
used
bulk
heterojunction
(BHJ)
structure
has
problems
such
as
material
solubility
limitations
and
emerging
pseudoplanar
(PPHJ)
also
troubled
by
printing
technology
requirements.
However,
these
issues
can
be
solved
reasonable
application
traditional
planar
(PHJ)
structure.
Herein,
PM6:BO‐4F
system
selected
prepare
PHJ
devices
combining
sequential
spin‐coating
orthogonal
solvent
strategy.
In
view
good
PM6
BO‐4F
in
commonly
high‐boiling
chlorobenzene
(CB)
green
tetrahydrofuran
(THF),
respectively,
are
successfully
prepared
using
two
solvents,
achieving
a
power
conversion
efficiency
(PCE)
15.6%.
On
this
basis,
nonhalogen
reagent
o
‐xylene
(O‐XY)
further
process
PM6.
Due
large
polarity
difference
between
O‐XY
THF,
all‐green
solvent‐processed
fabricated
obtain
astonishing
PCE
16%.
As
far
it
known,
highest
for
OSCs.
The
results
prove
huge
research
potential
point
out
new
direction
solving
OSC
materials
compatibility,
long‐term
stability,
future
commercial
applications.
Energies,
Год журнала:
2021,
Номер
14(14), С. 4200 - 4200
Опубликована: Июль 12, 2021
The
power
conversion
efficiency
(PCE)
of
organic
photovoltaics
(OPVs)
has
exceeded
18%
with
narrow
bandgap,
non-fullerene
materials
Y6
or
its
derivatives
when
used
as
an
electron
acceptor.
PCE
improvement
OPVs
is
due
to
strong
photon
harvesting
in
near-infrared
light
range
and
low
energy
loss.
Meanwhile,
ternary
strategy
commonly
recognized
a
convenient
efficient
means
improve
the
OPVs.
In
this
review
article,
typical
donor
acceptor
prepared
are
summarized.
From
device
engineering
perspective,
research
work
on
tandem
structure
introduced
for
understanding
design
selection
preparing
Abstract
Recently,
the
power
conversion
efficiency
(PCE)
of
single‐junction
non‐fullerene
polymer
solar
cells
(NF‐PSCs)
has
surpassed
19%
due
to
fast
development
novel
donor
polymers,
NF‐acceptors,
device
engineering,
and
interlayer
materials.
The
anode
(AIL)
plays
a
vital
role
in
improving
stability
PSCs.
challenges
opportunities
this
research
area
encourage
researchers
pursue
great
innovation
developing
new
materials
strategies
for
highly
efficient
NF‐PSCs.
This
review
summarizes
recent
AIL
their
modification
Firstly,
brief
introduction,
key
functions,
basic
requirements,
peculiar
features
AILs
when
employed
NF‐PSCs
are
discussed.
Then,
impact
(including
organic,
inorganic,
hybrid
materials)
on
PCE
described.
Afterward,
fabrication
large‐area
devices
related
issues
highlighted.
summary
future
regarding
summarized
last
section
review.
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