International Journal of Modern Physics B,
Год журнала:
2024,
Номер
unknown
Опубликована: Май 14, 2024
In
this
work,
we
delve
into
the
investigation
of
structural,
electronic,
and
optical
properties
Ba
2
NbBiS
6
TaSbS
chalcogenide-based
double
perovskites,
which
are
structured
in
cubic
space
group
[Formula:
see
text]
form.
We
have
performed
first-principles
calculations
using
density
functional
theory
(DFT)
to
study
above
properties.
The
electronic
band
structure
states
compound
been
investigated,
their
results
show
that
exhibit
a
semiconducting
nature
with
an
indirect
energy
gap
1.680[Formula:
text]eV
1.529[Formula:
text]eV,
respectively.
Furthermore,
was
conducted
on
compounds
throughout
range
spanning
from
0[Formula:
55[Formula:
text]eV.
This
focused
many
parameters,
including
dielectric
functions,
reflectivity,
refractive
index,
extinction
coefficient,
conductivity,
electron
loss.
data
obtained
reveals
all
demonstrate
isotropy
polarization.
it
has
noted
our
absorption
inside
ultraviolet
(UV)
region.
Consequently,
these
materials
hold
promise
as
potential
candidates
for
various
applications,
such
UV
photodetectors,
light
emitters,
power
electronics.
is
primarily
attributed
inherent
limits
presence
prominent
peaks
spectral
range.
brief,
chemical
mutation
techniques
employed
manipulate
characteristics
double-sulfide
perovskites
develop
durable
environmentally
friendly
perovskite
suitable
solar
purposes.
ACS Omega,
Год журнала:
2024,
Номер
9(14), С. 16860 - 16867
Опубликована: Март 29, 2024
The
optoelectronic,
structural,
and
elastic
properties
of
K2ScCuCl6
K2YCuCl6
double
perovskite
compounds
were
thoroughly
investigated
in
this
study
using
density
functional
theory.
It
is
observed
that
both
exhibit
exceptional
structural
mechanical
stability.
stability
assessed
Goldsmith's
tolerance
factor
(tG),
with
values
approaching
unity
indicating
a
reliable
cubic
structure.
Phonon
was
ensured
by
the
absence
negative
energy
formations
only
real
frequencies
phonon
calculations.
Applying
finite
displacement
method
also
provided
further
evidence
compounds'
thermodynamic
electronic
analysis
revealed
are
narrow
band
gap
semiconductors,
1.8
2.5
eV,
respectively.
This
confirmed
analyzing
states.
Furthermore,
optical
exhibited
transparency
at
lower
photon
energies
significant
absorption
higher
energies.
These
exciting
findings
suggest
have
promising
applications
high-frequency
UV
devices.