Perovskite
solar
cells
(PSCs)
have
garnered
significant
attention
due
to
their
tunable
bandgap,
superior
charge
carrier
properties,
and
easy
fabrication
processes,
making
them
highly
efficient
energy
conversion
devices.
Despite
these
advantages,
nonradiative
recombination
defects
in
the
perovskite
layer
continues
limit
performance.
This
study
addresses
this
issue
by
introducing
1‐CarboxyMethyl‐3‐MethylImidazolium
chloride
(ImAcCl)
into
precursor
solution
enhance
film
quality
suppress
defect‐induced
recombination.
The
carboxylate
groups
(CO)
hydrogen
donors
(NH)
ImAcCl
form
coordination
bonds,
helping
reduce
defect
density
of
film.
Additive
improves
crystallinity,
reduces
surface
roughness,
enhances
transport,
leading
higher
photovoltaic
With
additive,
power
efficiency
short‐circuit
current
PSCs
significantly
improve
23.92%
25.35
mA
cm
−2
,
with
a
notable
reduction
losses.
highlights
potential
as
an
effective
additive
for
passivation
PSCs,
offering
promising
pathway
toward
further
improvements
next‐generation
cells.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
17(2), С. 3686 - 3697
Опубликована: Дек. 31, 2024
Dark
current
density,
a
critical
parameter
in
perovskite
photodetectors
(PPDs),
largely
depends
on
the
quality
of
film.
Herein,
we
introduce
new
small
molecule
antisolvent
strategy
to
enhance
film
during
crystallization
Cs0.05(FA0.95MA0.05)0.95Pb(I0.95Br0.05)3.
COTIC-4Cl,
an
N-type
narrow
bandgap
nonfullerene
with
specific
functional
group,
could
strongly
bind
uncoordinated
Pb2+
assistance
antisolvent,
enabling
rapid
supersaturation
solution
and
form
dense
structures
under
low-temperature
annealing.
This
leads
decreased
nonradiative
recombination
improved
carrier
transport
efficiency
COTIC-4Cl-modified
perovskites.
The
PPDs
based
films
exhibit
broad
spectral
response
from
300
815
nm,
exceptionally
low
dark
density
2.17
×
10–11
A
cm–2,
enhanced
detectivities
1.84
1014and
3.09
1012
Jones
at
0
−0.5
V
bias,
respectively.
Improved
responsivity
detectivity
650–780
nm
result
strong
near-infrared
light
absorption
by
COTIC-4Cl.
These
optimized
are
comparable
commercial
silicon
photodetectors,
promising
significant
advancements
cost-effective
photodetector
technology.
N‐Methyl‐2‐pyrrolidone
(NMP)
has
become
one
of
the
mainstream
Lewis
base
ligand
solvents
for
fabrication
high‐quality
FA‐based
perovskite
films.
However,
NMP‐based
films
with
small
grain
sizes
always
own
a
mirror
surface
which
will
increase
reflection
light
and
limit
current
solar
cells
(PSCs).
In
this
work,
2‐pyrrolidone
(NP)
higher
boiling
point
stronger
binding
to
precursor
components
is
introduced
into
solution
improve
crystallization
morphology
perovskite.
Finally,
rougher
film
larger
size
can
be
fabricated
via
an
optimized
NP
NMP
mixed
solvent.
Based
on
strategy,
champion
device
achieved
power
conversion
efficiency
(PCE)
24.20%
(certified
PCE
23.81%)
22.13%
aperture
area
0.0875
22.96
cm
2
,
respectively.
addition,
introduction
enhances
humidity
stability
film,
retained
94.1%
its
initial
after
120
h.
Molecules,
Год журнала:
2024,
Номер
29(18), С. 4440 - 4440
Опубликована: Сен. 19, 2024
Copper(I)
thiocyanate
(CuSCN)
is
considered
an
efficient
HTL
of
low
cost
and
with
high
stability
in
perovskite
solar
cells
(PSCs).
However,
the
diethyl
sulfide
solvent
used
for
CuSCN
preparation
known
to
cause
damage
underlying
layer
n-i-p
PSCs.
Antisolvent
treatment
during
spin-coating
can
effectively
minimize
interfacial
interactions.
effects
antisolvent
are
not
sufficiently
understood.
In
this
study,
five
different
antisolvents
were
investigated.
Scanning
electron
microscopy
X-ray
diffraction
analyses
showed
that
improved
crystallinity
on
reduced
layer.
ultraviolet
photoelectron
spectroscopy
did
affect
chemical
bonds
or
electronic
structures
CuSCN.
As
a
result,
power
conversion
efficiency
PSCs
was
increased
from
14.72%
untreated
15.86%
ethyl-acetate-treated
The
power
conversion
efficiency
(PCE)
of
perovskite
solar
cells
(PSCs)
has
reached
an
impressive
value
26.1%.
While
several
initiatives
such
as
structural
modification
and
fabrication
techniques
helped
steadily
increase
the
PCE
stability
PSCs
in
recent
years,
incorporation
metal–organic
frameworks
(MOFs)
stands
out
among
other
innovations
emerged
a
promising
path
forward
to
make
this
technology
front‐runner
for
realizing
next‐generation
low‐cost
photovoltaic
technologies.
Owing
their
unique
physiochemical
properties
extraordinary
advantages
large
specific
surface
area
tunable
pore
structures,
incorporating
them
as/in
different
functional
layers
endows
devices
with
optoelectronic
properties.
This
article
reviews
latest
research
practices
adapted
integrating
MOFs
derivative
materials
into
constituent
blocks
photoactive
absorber,
electron‐transport
layer,
hole‐transport
interfacial
layer.
Notably,
special
emphasis
is
placed
on
aspect
improvement
by
materials.
Also,
potential
lead
absorbents
highlighted.
Finally,
outlook
critical
challenges
faced
future
perspectives
employing
light
commercialization
provided.
Perovskite
solar
cells
(PSCs)
have
garnered
significant
attention
due
to
their
tunable
bandgap,
superior
charge
carrier
properties,
and
easy
fabrication
processes,
making
them
highly
efficient
energy
conversion
devices.
Despite
these
advantages,
nonradiative
recombination
defects
in
the
perovskite
layer
continues
limit
performance.
This
study
addresses
this
issue
by
introducing
1‐CarboxyMethyl‐3‐MethylImidazolium
chloride
(ImAcCl)
into
precursor
solution
enhance
film
quality
suppress
defect‐induced
recombination.
The
carboxylate
groups
(CO)
hydrogen
donors
(NH)
ImAcCl
form
coordination
bonds,
helping
reduce
defect
density
of
film.
Additive
improves
crystallinity,
reduces
surface
roughness,
enhances
transport,
leading
higher
photovoltaic
With
additive,
power
efficiency
short‐circuit
current
PSCs
significantly
improve
23.92%
25.35
mA
cm
−2
,
with
a
notable
reduction
losses.
highlights
potential
as
an
effective
additive
for
passivation
PSCs,
offering
promising
pathway
toward
further
improvements
next‐generation
cells.
