Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 18, 2024
Abstract
High
efficiency,
stability,
and
flexibility
are
key
prerequisites
for
the
commercial
applications
of
organic
solar
cells
(OSCs).
Herein,
three
back‐to‐back
connected
dimers
(2Qx‐TT,
2Qx‐C3,
2Qx‐C6)
developed
as
guest
acceptors
OSCs
with
improved
comprehensive
performance.
By
regulating
linkage
from
rigid
bithiophene
to
flexible
alkyl
chain,
display
quite
different
molecular
geometry
intermolecular
interactions,
consequently
influencing
their
packing
arrangement,
film‐forming
process,
carrier
mobilities,
device
flexibility.
introducing
these
dimer
into
active
layer,
form
alloy
phases
host
acceptor,
promoting
process
charge
dynamics.
All
ternary
devices
exhibit
PCEs
over
18%
than
control
binary
device.
Among
them,
2Qx‐C3‐based
obtains
best
efficiency
high
19.03%.
Moreover,
thanks
stronger
entanglement
favored
by
linkage,
PM6:BTP‐eC9:2Qx‐C3‐based
shows
outstanding
stability
The
displays
an
PCE
16.09%
a
crack‐onset
strain
15.0%,
showing
excellent
mechanical
robustness
close
all‐polymer
devices.
This
work
demonstrates
potential
highly
efficient,
stable
OSCs.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 30, 2024
Abstract
Oligomeric
acceptors
(OAs)
have
attracted
considerable
attention
in
the
organic
photovoltaics
(OPV)
field
owing
to
their
capacity
balancing
merits
from
both
monomeric
and
polymeric
acceptors.
A
delicate
control
over
distortion
between
blocks
of
OAs
usually
determines
performance
stability
relevant
OPV
devices.
However,
it
imposes
great
complexity
realize
a
controllable
degree
by
tuning
skeleton
position
linker
blocks.
Herein,
we
developed
facile
strategy
rationally
geometry
via
straightforward
substitution
alkoxy
side‐chains
on
This
helps
elucidate
integrated
influences
molecular
non‐bonded
contacts
selective
interactions
OA
molecules
host
acceptor
ternary
blend.
We
demonstrate
alkoxy‐OA
having
stronger
self‐interactions
would
mitigate
with
acceptor,
therefore
alleviating
kinetic
diffusion
excessive
aggregation
total
Combining
composite‐interlayer
introducing
phenyl‐substituted
self‐assembled
monolayer
enhance
doping
polyoxometalate,
an
impressive
efficiency
20.1
%
is
achieved
accompanied
negligible
burn‐in
loss
against
physical
aging.
study
demonstrates
validation
towards
high‐performance
burn‐in‐free
OPV.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 5, 2024
Abstract
Significant
advancements
in
power
conversion
efficiency
have
been
achieved
organic
solar
cells
with
small
molecule
acceptors.
However,
stability
remains
a
primary
challenge,
impeding
their
widespread
adoption
renewable
energy
applications.
This
review
summarizes
the
degradation
of
different
layers
within
device
structure
under
varying
conditions,
including
light,
heat,
moisture,
and
oxygen.
For
photoactive
layers,
chemical
pathways
polymer
donors
acceptors
are
examined
detail,
alongside
morphological
bulk
heterojunction
structure,
which
plays
crucial
role
performance.
The
mechanisms
commonly
used
anode
cathode
interlayers
electrodes
addressed,
as
these
significantly
influence
overall
stability.
Mitigation
methods
for
identified
provided
each
section
to
offer
practical
insights
improving
longevity.
Finally,
an
outlook
presents
remaining
challenges
achieving
long‐term
stability,
emphasizing
research
directions
that
require
further
investigation
enhance
reliability
performance
real‐world
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 27, 2024
Abstract
Despite
significant
improvements
in
power
conversion
efficiencies
(PCEs)
of
organic
solar
cells
(OSCs),
achieving
excellent
stability
remains
a
great
challenge
to
their
commercial
feasibility.
Here,
U
‐shaped
dimeric
acceptors
(5‐IDT
and
6‐IDT)
with
different
molecular
lengths
are
introduced
into
the
binary
OSCs
as
third
component,
respectively.
The
introduction
component
effectively
reduces
energetic
disorder
non‐radiative
voltage
losses
improves
exciton
dissociation
charge
transport
devices.
Consequently,
PCEs
6‐IDT‐
5‐IDT‐treated
significantly
improved
19.32%
19.96%,
respectively,
which
is
highest
PCE
for
oligomeric
acceptors‐based
ternary
date.
Meanwhile,
thermal
treated
devices
dramatically
improved,
initial
efficiency
retention
increasing
from
18%
32%
75%,
after
1000
h
stress.
This
mainly
attributed
ability
smaller
length
5‐IDT
stabilize
phase‐separated
morphology
polymeric
donor
small
acceptor,
rather
than
high
glass
transition
temperature
low
diffusion
coefficient.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(35)
Published: July 15, 2024
Dimer
acceptors
in
organic
solar
cells
(OSCs)
offer
distinct
advantages,
including
a
well-defined
molecular
structure
and
excellent
batch-to-batch
reproducibility.
Their
high
glass
transition
temperature
(T
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 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.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
14(23)
Published: May 15, 2024
Abstract
Organic
photovoltaic
(OPV)
technology
has
recently
achieved
remarkable
progress
in
academia,
attaining
power
conversion
efficiencies
exceeding
19%,
a
breakthrough
previously
unimaginable.
Despite
these
advancements,
the
translation
of
high‐efficiency
OPV
cells
into
commercialization
modules
been
limited,
impeding
market
penetration
technology.
Upon
careful
examination,
various
challenges
emerge,
including
disparities
between
laboratory
research
and
industrial
production
device
architecture,
influenced
by
considerations
cost
manufacturability.
Additionally,
incorporation
materials
requires
consideration
not
only
compatibility
photoactive
layer
interface
layers
or
transparent
electrodes
but
also
associated
synthetic
complexity
chemical
structures
implications.
While
issues
are
crucial,
they
may
be
widely
discussed
current
mainstream
research.
In
this
article,
purpose
is
to
identify
bottlenecks
from
material
techniques
perspective,
with
aim
promoting
increased
resources
pertinent
module
technologies.
This
effort
intended
propel
toward
greater
success
bring
it
closer
alignment
goals
commercialization.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(44)
Published: July 11, 2024
Abstract
Overcoming
the
trade‐off
between
short‐circuited
current
(
J
sc
)
and
open‐circuited
voltage
V
oc
is
important
to
achieving
high‐efficiency
organic
solar
cells
(OSCs).
Previous
works
modulated
energy
gap
Frenkel
local
exciton
(LE)
charge‐transfer
(CT)
exciton,
which
served
as
driving
force
of
splitting.
Differently,
our
work
focuses
on
modulation
LE‐CT
excitonic
coupling
(t
via
a
simple
but
effective
strategy
that
2‐chlorothiophene
(2Cl−Th)
solvent
utilizes
in
treatment
OSC
active‐layer
films.
The
results
experimental
measurements
theoretical
simulations
demonstrated
2Cl−Th
initiates
tighter
intermolecular
interactions
with
non‐fullerene
acceptor
comparison
traditional
chlorobenzene
solvent,
thus
suppressing
acceptor's
over‐aggregation
retarding
crystallization
reduced
trap.
Critically,
resulting
shorter
distances
donor
molecules
treated
blend
efficiently
strengthen
t
,
not
only
promotes
splitting
also
reduces
non‐radiative
recombination.
champion
efficiencies
19.8
%
(small‐area)
superior
operational
reliability
(T80:
586
hours)
17.0
(large‐area)
were
yielded
cells.
This
provided
new
insight
into
modulating
dynamics
overcome
can
productively
promote
development
field.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(46)
Published: July 31, 2024
Thermally
activated
delayed
fluorescence
(TADF)
emitters
with
a
high
horizontal
orientation
are
highly
essential
for
improving
the
external
quantum
efficiency
(EQE)
of
organic
light-emitting
diodes;
however,
pivotal
molecular
design
strategies
to
improve
solution-processable
TADF
still
scarce
and
challenging.
Herein,
phenyl
bridge
is
adopted
connect
double
units,
generate
dimerized
dendrimer,
D4CzBNPh-SF.
Compared
its
counterpart
single
unit,
proof-of-the-concept
molecule
not
only
exhibits
an
improved
dipole
ratio
(78
%)
due
π-delocalization-induced
extended
conjugation,
but
also
displays
faster
reversed
intersystem
crossing
rate
constant
(6.08×10
