Halogenation Engineering of Solid Additives Enables 19.39% Efficiency and Stable Binary Organic Solar Cells via Manipulating Molecular Stacking and Aggregation of Both Donor and Acceptor Components
Wenyan Su,
Xuming Zhou,
Qiang Wu
и другие.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 3, 2024
Abstract
By
selectively
interacting
with
acceptor
components,
various
typed
solid
additives
achieve
boosted
power
conversion
efficiency
(PCE)
in
organic
solar
cells
(OSCs).
However,
due
to
the
efficient
active
layer
being
composed
of
donor
and
materials,
it
is
difficult
obtain
desired
morphology
by
manipulating
component
alone,
limiting
further
improvement
PCEs.
Herein,
two
a
same
backbone
thiophene‐benzene‐thiophene
(halogen‐free
D1‐H)
but
different
halogen
substituents
(fluorinated
D1‐F
chlorinated
D1‐Cl)
are
developed
probe
working
mechanism
halogenated
variation
OSCs.
Unlike
D1‐H
continuous
charge
distributions,
D1‐Cl
show
isolated
positive
distribution
benzene‐core
negative
thiophene,
offering
stronger
non‐covalent
interactions
both
(PM6)
(L8‐BO),
especially
D1‐Cl.
Consequently,
D1‐Cl‐treated
obtains
an
optimized
phase
separation
improved
molecular
packing,
boosting
PCE
18.59%
device
stability
OSCs,
17.62%
for
D1‐H‐treated
counterparts.
Moreover,
using
D18:L8‐BO
D18:BTP‐eC9
as
layers,
binary
OSCs
impressive
PCEs
19.29%
19.39%,
respectively.
This
work
indicates
that
halogenation
engineering
can
effectively
regulate
improving
elucidates
underlying
mechanism.
Язык: Английский
A systematic investigation on pyridine derived solid additives inducing fibrillar morphology for highly efficient organic solar cells with over 20 % efficiency
Materials Science and Engineering R Reports,
Год журнала:
2025,
Номер
164, С. 100977 - 100977
Опубликована: Март 18, 2025
Язык: Английский
Progress in the Stability of Small Molecule Acceptor‐Based Organic Solar Cells
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 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
Язык: Английский
Organic Solar Cell with Efficiency of 20.49% Enabled by Solid Additive and Non‐Halogenated Solvent
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 26, 2025
Abstract
Recently,
benzene‐based
solid
additives
(BSAs)
have
emerged
as
pivotal
components
in
modulating
the
morphology
of
blend
film
organic
solar
cells
(OSCs).
However,
since
almost
all
substituents
on
BSAs
are
weak
electron‐withdrawing
groups
and
contain
halogen
atoms,
study
with
non‐halogenated
strong
has
received
little
attention.
Herein,
an
additive
strategy
is
proposed,
involving
incorporation
benzene
ring.
An
effective
BSA,
4‐nitro‐benzonitrile
(NBN),
selected
to
boost
efficiency
devices.
The
results
demonstrate
that
NBN‐treated
device
exhibits
enhanced
light
absorption,
superior
charge
transport
performance,
mitigated
recombination,
more
optimal
compared
additive‐free
OSC.
Consequently,
D18:BTP‐eC9+NBN‐based
binary
D18:L8‐BO:BTP‐eC9+NBN‐based
ternary
OSC
processed
by
solvent
achieved
outstanding
efficiencies
20.22%
20.49%,
respectively.
Furthermore,
universality
NBN
also
confirmed
different
active
layer
systems.
In
conclusion,
this
work
demonstrates
introduction
electron‐absorbing
moieties
ring
a
promising
approach
design
BSAs,
which
can
tune
achieve
highly
efficient
devices,
certain
guiding
significance
for
development
BSAs.
Язык: Английский
Enabling High‐Efficiency and Stable Binary Organic Solar Cells by Solid Additive‐Assisted Morphology Modulation
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 30, 2024
Abstract
The
solid
additive
strategy
represents
a
simple
yet
effective
approach
to
achieving
high‐efficiency
organic
solar
cells
(OSCs)
by
enhancing
the
morphology
of
active
layer.
In
this
study,
highly
volatile
additive,
2,4,6‐trichloro‐1,3,5‐triazine
(TCT),
is
employed
modulate
morphology.
Unlike
other
additives
previously
reported,
TCT
exhibits
remarkable
intermolecular
interactions
with
both
polymer
donor
and
acceptor,
offering
two
distinct
advantages.
Firstly,
notably
enhances
crystallinity
molecular
order
blend
film,
subtly
optimizing
fiber
network
structure
within,
thereby
facilitating
carrier
transport
significantly
improving
mobility
film.
Secondly,
stabilizes
bi‐continuous
fibrous
mitigating
morphological
evolution
layer
device
stability.
Consequently,
D18:L8‐BO:TCT
higher
power
conversion
efficiency
19.50%
compared
D18:L8‐BO
(18.13%).
Furthermore,
after
960
h
storage,
OSC
treated
retains
90%
its
initial
PCE,
outperforming
(73%).
This
study
presents
promising
avenue
for
high‐performance
OSCs
through
manipulating
additives.
Язык: Английский