Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 13, 2024
Abstract
Inorganic
metal
oxides
and
salts
are
widely
employed
as
hole‐transporting
layers
(HTLs)
in
organic
solar
cells
(OSCs)
due
to
their
advantages
of
low
cost
facile
preparation.
However,
issues
such
severe
agglomeration
can
negatively
impact
film
quality,
leading
reduced
reproducibility
device
stability.
To
address
these
challenges,
this
work
reports
the
synthesis
a
vanadium
trichloride‐benzene
tricarboxylic
acid
(BTC)
complex
(denoted
VB)
via
sol‐gel
process
under
mild
conditions
(60
°C
annealing).
The
VB
demonstrates
well‐aligned
energy
levels
enhanced
conductivity
when
integrated
with
PM6:L8‐BO
active
layer.
Consequently,
binary
OSCs
incorporating
HTL
achieve
high‐power
conversion
efficiency
(PCE)
up
19.60%.
Notably,
processing
technique
offers
versatile
approach
for
fabrication
metal‐organic
complex,
resulting
uniform
dense
film.
robust
coordination
network
structure
endows
VB‐based
exceptional
thermal
stability,
evidenced
by
T
80
(PCE
retention
80%
initial
value)
lifetime
5142
h,
which
is
among
best
performances
reported
state‐of‐the‐art
OSCs.
Chinese Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
42(14), P. 1644 - 1650
Published: March 22, 2024
Comprehensive
Summary
It
remains
an
urgent
task
to
develop
alternative
hole‐transporting
layer
(HTL)
materials
beyond
commonly
used
PEDOT:PSS
increase
the
shelf‐life
of
organic
solar
cells
(OSCs).
Inorganic
metal
oxide
type
materials,
such
as
NiO
x
,
CoO
and
VO
with
suitable
work
functions
have
attracted
numerous
research
attention
recently.
In
this
work,
more
abundant
easily
accessible
oxygenated
salt,
vanadyl
sulfate
(VOSO
4
)
has
been
demonstrated
be
excellent
choice
HTL
for
OSCs.
The
VOSO
‐based
can
readily
processed
by
spin‐coating
from
precursor
solution
subsequent
thermal
annealing
UVO
treatment.
As
a
consequence,
high
power
conversion
efficiency
(PCE)
18.72%
achieved
PM8:L8‐BO
based
OSCs
HTL.
High
transmittance,
smooth
film
surface,
energy
level
conductivity
were
revealed
contribute
OSC
performance.
More
importantly,
compared
device
PEDOT:PSS,
exhibit
improved
stability
when
stored
in
N
2
filled
glove
box.
After
being
600
h,
retain
89%
its
initial
efficiency.
Notably,
general
PM6:BTP‐BO‐4Cl
PM6:IT‐4F
OSCs,
yielding
PCEs
17.87%
13.85%,
respectively.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 13, 2024
Abstract
Inorganic
metal
oxides
and
salts
are
widely
employed
as
hole‐transporting
layers
(HTLs)
in
organic
solar
cells
(OSCs)
due
to
their
advantages
of
low
cost
facile
preparation.
However,
issues
such
severe
agglomeration
can
negatively
impact
film
quality,
leading
reduced
reproducibility
device
stability.
To
address
these
challenges,
this
work
reports
the
synthesis
a
vanadium
trichloride‐benzene
tricarboxylic
acid
(BTC)
complex
(denoted
VB)
via
sol‐gel
process
under
mild
conditions
(60
°C
annealing).
The
VB
demonstrates
well‐aligned
energy
levels
enhanced
conductivity
when
integrated
with
PM6:L8‐BO
active
layer.
Consequently,
binary
OSCs
incorporating
HTL
achieve
high‐power
conversion
efficiency
(PCE)
up
19.60%.
Notably,
processing
technique
offers
versatile
approach
for
fabrication
metal‐organic
complex,
resulting
uniform
dense
film.
robust
coordination
network
structure
endows
VB‐based
exceptional
thermal
stability,
evidenced
by
T
80
(PCE
retention
80%
initial
value)
lifetime
5142
h,
which
is
among
best
performances
reported
state‐of‐the‐art
OSCs.
