Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 21, 2024
Abstract
Organic
solar
cells
(OSCs)
based
on
giant
molecular
acceptors
(GMAs)
have
attracted
extensive
attention
due
to
their
excellent
power
conversion
efficiency
(PCE)
and
operation
stability.
However,
the
large
conjugated
plane
of
GMAs
poses
great
challenges
in
regulating
solubility,
over‐size
aggregation
yield,
which
turn
further
constrains
development
commercial
products.
Herein,
we
employ
a
non‐fused
skeleton
strategy
develop
novel
star‐shape
trimers
(3BTT6F
3BTT6Cl)
for
improving
device
performance.
Single‐bond
linkage
can
break
rigid
planarity
form
3D
architecture,
generating
multidimensional
charge
transfer
pathways.
Importantly,
not
only
significantly
improve
solubility
synthesis
but
also
effectively
suppress
excessive
aggregation.
Consequently,
optimized
film‐forming
process
dynamics,
3BTT6F‐based
binary
obtains
high
PCE
17.52
%,
is
higher
than
reported
fully
fused
trimers.
Excitingly,
ternary
even
top‐level
19.26
%.
Furthermore,
configuration
endows
these
with
enhanced
intermolecular
interaction
active
layer,
demonstrating
operational
Our
work
emphasizes
potential
trimers,
providing
new
pathway
achieving
highly
efficient
stable
OSCs.
Perovskite-based
tandem
solar
cells
(PTSCs)
are
promising
for
achieving
higher
efficiency
limits,
making
them
candidates
energy
supply.
However,
the
commercialization
in
complex
scenarios
necessitate
extreme
stability
and
reliability
of
devices,
particularly
ambient
conditions.
Herein,
use
a
high-efficiency
air-stable
quaternary
all-polymer
bulk
heterojunction
(BHJ)
is
pioneered
to
optimize
spectral
absorption,
facilitate
charge
transport,
suppress
exciton
recombination,
resulting
18.0%
power
conversion
(PCE)
organic
subcell.
The
resultant
monolithic
perovskite/organic
cell
(POTSC)
delivers
an
impressive
PCE
24.8%,
with
minimal
distribution
negligible
hysteresis.
Ambient
tests
on
devices
reveal
outstanding
stability,
which
attributed
reduced
increase
recombination.
Remarkably,
unencapsulated
device
maintained
88%
its
initial
after
exposure
air
500
h.
superior
owing
enhanced
resistance
hydrophobic
BHJ
water
oxygen,
thereby
protecting
perovskite
active
layer.
This
work
provides
novel
approach
from
perspective
POTSC
holds
promise
future
real-world
applications
field
cells.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(45)
Опубликована: Авг. 29, 2024
Abstract
A
bromine‐substituted
[2‐(9H‐Carbazol‐9‐yl)
ethyl]
phosphonic
acid,
1Br‐2PACz,
is
designed
as
hole‐selective
self‐assembled
monolayers
(SAMs),
contributing
to
an
outstanding
power
conversion
efficiency
(PCE)
of
19.35%
for
binary
bulk‐heterojunction
(BHJ)
based
organic
solar
cells
(OSCs).
As
compared
the
previous
high‐performance
2Br‐2PACz
SAMs,
1Br‐2PACz
molecules
can
effectively
reduce
interaction
SAM
with
BTP‐eC9
nonfullerene
acceptors
a
decreased
binding
energy,
resulting
in
suppressed
vertical
self‐aggregation
small
bottom
side
PM6:BTP‐eC9
BHJ
during
solidification
process.
There
energetic
disorder
within
photoactive
layer
together
more
efficient
charge
transfer
and
non‐radiative
recombination.
Furthermore,
five
additional
systems
are
applied
SAM‐based
OSCs,
exhibiting
continuously
superior
performance
reference
conventional
PEDOT:PSS
hole
transport
layer.
This
work
underscores
potential
advancing
OSCs
by
fine‐tuning
SAMs
through
halogenation
strategies
improve
active
morphology
overall
device
performance.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 9, 2024
Abstract
Organic
solar
cells
(OSCs)
are
gaining
attention
in
building‐integrated
and
agricultural
photovoltaics
due
to
their
light
weight,
mechanical
flexibility,
low‐cost
solution
processability.
To
achieve
commercial
viability,
understanding
the
relationships
between
active
layer
material
structure,
film
morphology,
photovoltaic
performance
is
crucial.
Nanoscale
infrared
spectroscopy
coupled
with
atomic
force
microscopy
(nanoIR‐AFM)
offers
an
advanced
characterization
of
morphology
at
high
resolution
help
understand
OSC
performance.
This
review
outlines
recent
developments
applications
nanoIR‐AFM
research,
detailing
its
principles,
instruments,
functions.
Strategies
enhance
morphological
by
discussed,
offering
insights
into
evolution
device
The
highlights
challenges
faced
potential
role
advancing
technology.
As
continues
evolve,
it
will
play
a
critical
development,
providing
essential
technical
means
for
further
progress.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 21, 2024
Abstract
Organic
solar
cells
(OSCs)
based
on
giant
molecular
acceptors
(GMAs)
have
attracted
extensive
attention
due
to
their
excellent
power
conversion
efficiency
(PCE)
and
operation
stability.
However,
the
large
conjugated
plane
of
GMAs
poses
great
challenges
in
regulating
solubility,
over‐size
aggregation
yield,
which
turn
further
constrains
development
commercial
products.
Herein,
we
employ
a
non‐fused
skeleton
strategy
develop
novel
star‐shape
trimers
(3BTT6F
3BTT6Cl)
for
improving
device
performance.
Single‐bond
linkage
can
break
rigid
planarity
form
3D
architecture,
generating
multidimensional
charge
transfer
pathways.
Importantly,
not
only
significantly
improve
solubility
synthesis
but
also
effectively
suppress
excessive
aggregation.
Consequently,
optimized
film‐forming
process
dynamics,
3BTT6F‐based
binary
obtains
high
PCE
17.52
%,
is
higher
than
reported
fully
fused
trimers.
Excitingly,
ternary
even
top‐level
19.26
%.
Furthermore,
configuration
endows
these
with
enhanced
intermolecular
interaction
active
layer,
demonstrating
operational
Our
work
emphasizes
potential
trimers,
providing
new
pathway
achieving
highly
efficient
stable
OSCs.
