npj Flexible Electronics,
Journal Year:
2021,
Volume and Issue:
5(1)
Published: Nov. 4, 2021
Abstract
Two
major
challenges
need
to
be
overcome
bridge
the
efficiency
gap
between
small-area
rigid
organic
solar
cells
(OSCs)
and
large-area
flexible
devices:
first
challenge
lies
in
preparing
high-quality
transparent
electrodes
with
low
resistance,
high
transparency,
smooth
surface,
superior
mechanical
properties.
Second,
scalable
fabrication
of
thickness-insensitive
photoactive
layers
low-cost
materials
is
also
an
essential
task.
In
this
review,
recent
progress
OSCs
are
summarized
analyzed.
Based
on
our
analysis,
strategies
opportunities
proposed
promote
development
stable
efficient
OSCs.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(20)
Published: Aug. 25, 2023
Abstract
Over
the
past
three
years,
remarkable
advancements
in
organic
solar
cells
(OSCs)
have
emerged,
propelled
by
introduction
of
Y6—an
innovative
A‐DA'D‐A
type
small
molecule
non‐fullerene
acceptor
(NFA).
This
review
provides
a
critical
discussion
current
knowledge
about
structural
and
physical
properties
PM6:Y6
material
combination
relation
to
its
photovoltaic
performance.
The
design
principles
PM6
Y6
are
discussed,
covering
charge
transfer,
transport,
recombination
mechanisms.
Then,
authors
delve
into
blend
morphology
degradation
mechanisms
before
considering
commercialization.
state
art
is
presented,
while
also
discussing
unresolved
contentious
issues,
such
as
energetics,
pathways
free
generation,
role
triplet
states
recombination.
As
such,
this
aims
provide
comprehensive
understanding
potential
for
further
development
field
cells.
By
addressing
both
successes
challenges
associated
with
system,
contributes
ongoing
research
efforts
toward
achieving
more
efficient
stable
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(15)
Published: Jan. 11, 2024
Abstract
Development
of
both
organic
photovoltaics
(OPVs)
and
photocatalysts
has
focused
on
utilizing
the
bulk
heterojunction
(BHJ).
The
BHJ
promotes
charge
separation
enhances
carrier
lifetime,
but
may
give
rise
to
increased
traps,
hindering
performance.
Here,
high
photocatalytic
photovoltaic
performance
is
displayed
by
electron
donor–acceptor
(D–A)
nanoparticles
(NPs)
films,
using
nonfullerene
acceptor
Y6
polymer
donor
PIDT‐T8BT.
In
contrast
conventional
D–A
systems,
generation
in
PIDT‐T8BT:Y6
NPs
mainly
driven
Y6,
allowing
a
even
at
low
D:A
mass
ratio
1:50.
attributed
amorphous
behavior
Low
ratios
are
generally
thought
yield
lower
efficiency
than
more
≈1:1
ratio.
However,
OPVs
exhibit
peak
1:5.
Similarly
used
for
hydrogen
evolution
show
1:6.7
Interestingly,
system,
as
proportion
increases,
reduced
observed.
unconventional
provide
recombination
losses
charge‐carrier
lifetime
with
undisrupted
ambipolar
transport
enabling
better
ratios.
This
work
reports
novel
light‐harvesting
materials
which
due
unfavorable
morphology
move
toward
1:1.2–1:1.
High-energy
photons
arising
from
the
UV
component
of
solar
spectrum
are
considered
as
a
primary
cause
photoinduced
degradation
observed
in
organic
cells
(OSCs).
We
herein
demonstrate
scheme
harvesting
these
high-energy
via
down-conversion
(UVDC)
layer
embedded
thin
polymeric
substrates
an
effective
strategy
for
simultaneously
enhancing
efficiency
and
improving
photostability
OSCs.
Transparent
UV-curable
photopolymer
resin
(NOA
61,
Norland,
Inc.)
is
employed
to
prepare
polymer
substrate
sandwich
UVDC
comprised
Ir(dmppy-ph)2tmd─a
highly
efficient
yellow
phosphorescent
emitter,
which
exhibits
high
degree
spectral
overlap
between
its
emission
spectra
absorption
PM6,
donor
used
photoactive
blend
along
with
non-fullerene
acceptor
Y7.
The
PM6:Y7
bulk
heterojunction
OSCs
fabricated
on
found
show
nearly
7.2%
higher
power
conversion
(PCE).
study
reveals
that
improvement
performance
essentially
due
ability
absorb
some
make
them
available
by
down-converting
visible
region
optical
scattering
effect
leads
longer
path
length
within
active
layer.
A
done
monitoring
PV
function
exposure
time
indicates
that,
proposed
approach,
it
possible
achieve
3-fold
enhancement
T97,
or
takes
PCE
become
97%
initial
value,
alleviating
UV-induced
photochemical
degradation.
Statistical
analysis
also
performed
wide
range
sample
distributions,
verifying
reliability
repeatability
results.
Materials Today Advances,
Journal Year:
2021,
Volume and Issue:
11, P. 100154 - 100154
Published: July 18, 2021
Since
a
couple
of
years
ago,
Y6
has
emerged
as
one
the
main
non-fullerene
acceptors
for
organic
solar
cells,
its
use
leads
to
superior
power
conversion
efficiencies.
It
is
thus
major
interest
investigate
multiscale
phenomena
that
are
responsible
Y6's
efficacy.
Here,
we
modeled
neat
films
and
earlier
acceptors,
IT-4F
ITIC,
using
combination
density
functional
theory
calculations
molecular
dynamics
simulations,
various
factors
control
their
charge
exciton
transport
rates.
We
find
packing
in
drastically
different
from
ITIC.
At
nanoscale,
local
morphology
consists
large
number
directional
face-on
stackings
well-connected
networks.
also
consistently
shows
higher
electronic
couplings
LUMOs,
HOMOs,
excitations
than
ITIC-type
which
results
fast
rates
electrons,
holes,
excitons.
Importantly,
when
considering
dimers,
configurations
more
diverse
with
many
those
similar
observed
crystal
structure
reported
recently.
Most
dimer
exhibit
strong
binding
interactions,
couplings,
high
rates,
taken
together
rationalize
better
performance
OSCs
based
on
Y6.
EcoMat,
Journal Year:
2022,
Volume and Issue:
5(1)
Published: Sept. 7, 2022
Abstract
The
innovation
of
non‐fullerene
acceptors
(NFAs)
enables
the
rapid
progress
organic
solar
cells
(OSCs)
in
power
conversion
efficiencies
to
over
19%,
endowing
OSCs
with
great
potential
toward
real‐world
application.
In
this
critical
review,
we
outline
recent
advances
NFA‐based
‐
from
ITIC‐
Y6‐family,
exemplify
structure–performance
correlations,
and
cover
material
chemistry
nanomorphology
controlling.
addition,
point
out
possible
degradation
mechanisms
behind
devices
strategies
for
mitigating
stability
issues.
With
OSC
approaching
20%
benchmark,
increasing
attention
has
been
built‐up
technology's
applications.
Therefore,
describe
opportunities
challenges
promising
applications,
mainly
on
semitransparent
flexible
commercial
photovoltaics.
Finally,
provide
a
summary
perspective
primary
technology
is
facing
commercialization.
image
Journal of Materials Chemistry A,
Journal Year:
2022,
Volume and Issue:
10(35), P. 17968 - 17987
Published: Jan. 1, 2022
The
fundamental
principles
of
the
molecular
design
Y-series
NFAs
(A–DA′D–A)
are
described,
together
with
their
achievements,
comprehension,
and
impact
on
photoelectric
characteristics,
photovoltaic
performance,
film
morphology.
