Chinese Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 26, 2024
Comprehensive
Summary
The
power
conversion
efficiencies
(PCEs)
of
non‐fullerene
acceptor
(NFA)‐based
organic
solar
cells
(OSCs)
have
undergone
an
exciting
development
in
recent
years,
but
the
poor
intrinsic
stability
exocyclic
ethylene
bridges
NFAs
poses
a
significant
challenge
to
their
commercialization.
In
this
work,
we
propose
new
pyran‐locking
strategy
that
can
stabilize
bridge
connecting
strong
electron‐deficient
2‐(3‐oxo‐2,3‐dihydroinden‐1‐ylidene)malononitrile
end
group,
based
on
which
two
dimerized
(ITBIC‐F
and
TBTBIC‐F)
with
A‐D‐π‐A‐π‐D‐A
structure
been
successfully
synthesized
significantly
improved
chemical
photochemical
stabilities
comparison
traditional
without
ring‐locked
structure.
ITBIC‐F
TBTBIC‐F
‐based
OSCs
not
only
achieve
promising
PCEs
13.03%
10.01%,
respectively,
also
show
good
device
stability;
ITBIC‐F‐based
unencapsulated
devices
retain
75%
62%
initial
PCEs,
under
continuous
heat
(85
°C)
light
irradiation
(LED,
100
mW·cm
–2
)
nitrogen
atmosphere.
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
Chinese Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 26, 2024
Comprehensive
Summary
The
power
conversion
efficiencies
(PCEs)
of
non‐fullerene
acceptor
(NFA)‐based
organic
solar
cells
(OSCs)
have
undergone
an
exciting
development
in
recent
years,
but
the
poor
intrinsic
stability
exocyclic
ethylene
bridges
NFAs
poses
a
significant
challenge
to
their
commercialization.
In
this
work,
we
propose
new
pyran‐locking
strategy
that
can
stabilize
bridge
connecting
strong
electron‐deficient
2‐(3‐oxo‐2,3‐dihydroinden‐1‐ylidene)malononitrile
end
group,
based
on
which
two
dimerized
(ITBIC‐F
and
TBTBIC‐F)
with
A‐D‐π‐A‐π‐D‐A
structure
been
successfully
synthesized
significantly
improved
chemical
photochemical
stabilities
comparison
traditional
without
ring‐locked
structure.
ITBIC‐F
TBTBIC‐F
‐based
OSCs
not
only
achieve
promising
PCEs
13.03%
10.01%,
respectively,
also
show
good
device
stability;
ITBIC‐F‐based
unencapsulated
devices
retain
75%
62%
initial
PCEs,
under
continuous
heat
(85
°C)
light
irradiation
(LED,
100
mW·cm
–2
)
nitrogen
atmosphere.
