Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(21), P. 21382 - 21387
Published: Oct. 18, 2024
CsBi3I10
perovskite
films
were
synthesized
by
an
antisolvent-assisted
spin-coating
method.
The
morphology
and
crystal
structure
of
the
film
characterized
using
scanning
electron
microscopy
(SEM),
X-ray
diffraction
(XRD),
Raman
spectroscopy,
confirming
its
crystallinity
purity.
Ultraviolet–visible
(UV–vis)
absorption
spectra
revealed
two
excitonic
peaks
peaked
at
496
626
nm.
Femtosecond
transient
spectroscopy
(TAS)
was
utilized
to
probe
exciton
dynamics
that
reveal
three
dominant
processes
attributed
hot
cooling,
trapping
trap
states,
electron–hole
recombination,
a
possible
dissociative
pathway
or
high
density
defect
states
coupled
with
first
excited
electronic
state
conduction
band
(CB),
which
lead
overall
short-lived
photoinduced
charge
carrier
exciton.
A
kinetic
model
proposed
simulate
explain
these
short
lifetime.
Nanomaterials,
Journal Year:
2024,
Volume and Issue:
14(7), P. 626 - 626
Published: April 2, 2024
Cesium
bismuth
iodide
perovskite
material
offers
good
stability
toward
ambient
conditions
and
has
potential
optoelectronic
characteristics.
However,
wide
bandgap,
absorber
surface
roughness,
poor
coverage
with
pinholes
are
among
the
key
impediments
to
its
adoption
as
a
photovoltaic
material.
Herein,
bandgap
modification
tailoring
of
morphology
have
been
performed
through
molar
ratio
variation
antisolvent
treatment,
whereby
type
III
(toluene)
based
on
Hansen
space
utilized.
XRD
Raman
spectroscopy
analyses
confirm
formation
0D/2D
mixed
dimensional
structure
improved
properties
when
CsI/BiI3
was
adjusted
from
1.5:1
1:1.5.
The
absorption
results
Tauc
plot
determination
show
that
fabricated
film
lower
1.80
eV.
TRPL
analysis
reveals
possesses
very
low
charge
carrier
lifetime
0.94
ns,
suggesting
deep
defects.
Toluene
improves
1.89
ns.
average
grain
size
also
increases
323.26
nm
444.3
upon
toluene
addition.
Additionally,
inclusion
in
modest
improvement
PCE,
0.23%
0.33%.
The Journal of Chemical Physics,
Journal Year:
2024,
Volume and Issue:
160(24)
Published: June 26, 2024
Lead
halide
perovskites
(LHPs)
have
gained
prominence
for
their
exceptional
photophysical
properties,
holding
promise
applications
in
high-end
optoelectronic
devices.
However,
the
presence
of
lead
is
one
major
obstacles
to
commercialization
LHPs
field
photovoltaics.
To
address
this,
researchers
explored
environment
friendly
lead-free
perovskite
solar
cells
by
investigating
non-toxic
materials.
This
study
explores
enhancement
properties
through
chemical
engineering,
specifically
cation
exchange,
focusing
on
crucial
process
hot
carrier
cooling.
Employing
femtosecond
transient
absorption
spectroscopy
and
optical
pump
terahertz
probe
spectroscopy,
we
probed
relaxation
dynamics
A3Sb2I9
with
cesium
rubidium
cations.
unravels
that
found
be
slower
Rb3Sb2I9;
along
mobility
decay
retarded.
Overall,
this
suggests
an
antimony-based
Rb3Sb2I9
could
a
substantial
These
findings
provide
valuable
insights
into
engineering
strategies,
aiming
improve
overall
performance
lead-free-based
photovoltaic
