ACS Applied Electronic Materials,
Journal Year:
2024,
Volume and Issue:
7(1), P. 590 - 600
Published: Dec. 23, 2024
This
study
focuses
on
the
photovoltaic
performance
of
MoSe2
nanosheet-based
bulk
heterojunction
polymer
solar
cells,
with
particular
attention
paid
to
power
conversion
efficiency
(PCE)
and
other
important
parameters.
The
PCE
values
pure
cell
are
5.88%,
while
those
NS1,
NS2,
NS3
6.61,
8.39,
7.37%,
respectively.
optimized
NS2
hybrid
at
5
wt
%
in
active
layer
exhibits
highest
8.39%,
short-circuit
current
density
15.865
mA/cm2,
open-circuit
voltage
0.837
V
which
outperforming
configurations.
Turning
our
X-ray
detectors,
we
find
that
same
concentration
works
best,
producing
sensitivity
2.65
mA/Gy·cm2
a
collected
8.85
μA/cm2.
These
results
highlight
how
versatile
NSs
improving
cells
detectors.
stands
out
as
particularly
promising
configuration
for
effective
energy
sensing
applications.
Advanced Optical Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 13, 2025
Abstract
Electron
tunneling
devices
attract
attention
due
to
their
potential
applications
in
integrated
circuits,
memories,
and
high‐frequency
oscillators.
However,
limited
works
are
devoted
the
optical
control
of
electron
processes.
The
main
reason
is
low
concentration
photogenerated
carriers
concerning
equilibrium
values
heavy‐doped
regions.
In
this
work,
violet
phosphorus
(VP)
with
a
unique
bilayer
tubular
structure
supplies
an
excellent
platform
for
investigating
mechanisms
under
photo
illumination.
A
VP‐based
vertical
diode
made
metal‐insulator‐semiconductor
(MIS)
stacking
presented.
increase
current
by
≈4.2
times
through
illumination,
leading
considerable
rectification
ratio.
addition,
three‐terminal
field‐effect
transistor
(TFET)
from
VP
flake
different
thicknesses
also
interband
electrons
results
tunable
negative
differential
transconductance
(NDT)
at
room
temperature.
photoillumination
can
modulate
onset
NDT
region
variation
density
states
Fermi
level
alignment
channel
drain
region.
These
advance
understanding
transport
devices,
showing
great
exploiting
novel
2D
multifunctional
interactions
between
light
carriers’
tunneling.
Abstract
2D
van
der
Waal
(vdWs)
heterostructures
present
unique
optoelectronic
characteristics,
making
them
favorable
layer
structures
for
constructing
promising
devices
with
multifunctional
applications.
Nevertheless,
as
a
result
of
significant
interface
recombination
the
photogenerated
electron‐hole
pairs
and
presence
various
absorption
edges
within
constituent
layers,
they
are
prone
to
experiencing
low
carrier
collection
efficiency.
In
this
work,
combined
theoretical
experimental
investigation
presented
on
2
Se
3
/ReS
vdWs
heterostructure,
aimed
at
developing
high‐performance
broadband
photodetector
multifunctionalities.
investigations,
it
is
observed
that,
by
adjusting
polarization
states
(+P
−P)
in
layer,
band
alignment
can
be
effectively
tuned
from
type‐I
type‐II,
providing
narrow
bandgap
≈0.65
eV,
which
beyond
that
their
individual
constituents.
As
photodetector,
device
shows
photoresponse
ranging
532
1550
nm
ultrahigh
responsivity
(99.36
AW
−1
),
detectivity
(3.5
×
10
13
Jones),
external
quantum
efficiency
(34195%).
Additionally,
competitive
sensitivity
across
broad
spectrum
imagining
capability
heterostructure.
This
study
demonstrates
heterostructure
provides
technique
Physical Chemistry Chemical Physics,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Exploring
valleytronics
in
two-dimensional
materials
is
of
great
significance
for
the
development
advanced
information
devices.
In
this
study,
we
investigate
valley
polarization
and
electronic
properties
V-doped
2H-phase
Janus
MoSeTe
by
using
first-principles
calculations.
Our
results
reveal
a
remarkable
spin
splitting
up
to
60
meV,
driven
breaking
time-reversal
symmetry
due
magnetic
effect
V
3d
orbitals.
Additionally,
observe
anomalous
Hall
(AVHE)
monolayer,
showcasing
its
potential
valleytronic
applications.
Importantly,
found
that
can
be
effectively
modulated
applying
external
strain,
with
notable
changes
at
different
strain
levels.
These
findings
suggest
monolayer
an
ideal
material
design
tunable,
controllable
devices,
offering
new
opportunities
next
generation
valley-based
technologies.
The Journal of Physical Chemistry Letters,
Journal Year:
2025,
Volume and Issue:
unknown, P. 2029 - 2038
Published: Feb. 18, 2025
Elemental
phosphorus
exhibits
a
remarkable
diversity
of
allotropes,
including
black,
white,
and
violet
phosphorus,
each
with
unique
structural
electronic
properties.
Recently,
has
experienced
renaissance
in
scientific
interest
for
its
potential
applications
across
various
fields.
Among
these,
the
red
(RP)
possesses
considerable
variety
stacking
configurations.
By
analyzing
preference
P21
building
block
Type
II,
IV,
V
RP
we
proposed
novel
butterfly
connected
scheme.
This
new
structure's
stability
was
well
confirmed
by
ab
initio
calculations.
It
is
characterized
as
semiconductor
band
gap
1.4
eV,
exhibiting
appearance.
Additionally,
this
structure
demonstrates
ferroelectric
behavior,
making
it
an
instance
single-element
materials.
Furthermore,
our
investigation
chain-type
structures
within
carbon
nanotubes
(CNTs)
revealed
that
type
connection
scheme
represents
lowest
energy
configuration
specifically
sized
CNTs.
Abstract
The
robust
excitonic
effects
in
layered
violet
phosphorus
(VP)
render
it
an
ideal
platform
for
exploring
photoluminescence
(PL)
at
2D
nanoscale.
However,
limited
research
on
its
luminescent
properties
constrains
understanding
and
hinders
potential
future
developments.
Here,
a
detailed
investigation
into
the
thickness‐dependent
PL
evolution
multilayer
VP
samples
is
conducted,
where
their
thicknesses
are
precisely
controlled
through
oxygen
plasma
dry
etching
technique.
pronounced
exciton‐trion
interaction
determines
envelop
of
spectra.
And
as
time
increases,
leading
to
decreased
sample's
thickness,
spectra
peak
blue‐shifts,
exciton‐trionic
ratio
changes.
unusual
spectral
oscillation
small
number
(≈12%)
discovered,
despite
majority
exhibiting
typical
overall
decaying
tendency
with
decreasing
thicknesses.
Subsequent
characterizations,
especially
cross‐sectional
high‐angle
annular
dark
field
scanning
transmission
electron
microscopy
(HAADF‐STEM)
images
measurements
second
harmonic
generation
(SHG),
hint
possible
existence
allotrope
new‐phase
VP.
First‐principles
calculations,
conjunction
energy
band
theory
analysis,
employed
delve
elucidate
alterations
resulting
from
carriers
non‐radiative/radiative
recombination
different
materials.
This
work
lays
foundation
VPs.
