The Journal of Chemical Physics,
Journal Year:
2024,
Volume and Issue:
161(8)
Published: Aug. 22, 2024
Low-dimensional
nanostructures,
especially
one-dimensional
materials,
exhibit
remarkable
anisotropic
characteristics
due
to
their
low
symmetry,
making
them
promising
candidates
for
polarization-sensitive
photodetection.
Here,
we
present
a
chemical
vapor
deposition
synthesis
method
tellurium
suboxide
(TeOx),
confirming
the
practicality
of
photodetectors
constructed
from
TeOx
nanowires
(NWs)
in
high-responsivity,
broadband,
and
detection.
By
precisely
controlling
thermodynamics
kinetics
NWs
growth,
achieve
large-scale
growth
with
highly
controllable
dimensions
propose
induce
intrinsic
built-in
strain
NWs.
Photodetectors
based
on
quasi-one-dimensional
ohmic
contact
demonstrate
broadband
spectral
response
(638–1550
nm),
high
responsivity
(13
700
mA·W−1),
superior
air
stability.
Particularly,
owing
inherent
structural
anisotropy
photodetectors,
they
photodetection,
ratios
1.70
1.71
at
638
808
nm,
respectively.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(11), P. 13927 - 13937
Published: March 8, 2024
Two-dimensional
van
der
Waals
(2D
vdW)
heterostructure
photodetectors
have
garnered
significant
attention
for
their
potential
applications
in
next-generation
optoelectronic
systems.
However,
current
2D
vdW
inevitably
encounter
compromises
between
responsivity,
detectivity,
and
response
time
due
to
the
absence
of
multilevel
regulation
free
photoexcited
carriers,
thereby
restricting
widespread
applications.
To
address
this
challenge,
we
propose
an
efficient
WS2/CuInP2S6
photodetector
by
combining
band
engineering
ferroelectric
modulation.
In
device,
asymmetric
conduction
valence
offsets
effectively
block
majority
carriers
(free
electrons),
while
holes
are
efficiently
tunneled
rapidly
collected
bottom
electrode.
Additionally,
CuInP2S6
layer
generates
polarization
states
that
reconfigure
built-in
electric
field,
reducing
dark
facilitating
separation
photocarriers.
Moreover,
photoelectrons
trapped
during
long-distance
lateral
transport,
resulting
a
high
photoconductivity
gain.
Consequently,
device
achieves
impressive
responsivity
88
A
W–1,
outstanding
specific
detectivity
3.4
×
1013
Jones,
fast
37.6/371.3
μs.
capability
high-resolution
imaging
under
various
wavelengths
optical
communication
has
been
successfully
demonstrated
using
highlighting
its
promising
application
prospects
future
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 17, 2025
Abstract
Taking
advantage
of
their
unparalleled
electrostatic
and
optoelectronic
properties,
2D
layered
materials
(2DLMs)
have
emerged
as
alluring
building
blocks
for
crafting
advanced
photodetectors.
Nevertheless,
preceding
research
has
predominantly
concentrated
on
rudimentary
designs
incorporating
single‐channel
or
single‐junction
setups,
failing
to
exert
the
full
potency
2DLMs.
Therefore,
there
is
still
an
imperative
requirement
develop
innovative
device
architectures
grounded
in
novel
physical
mechanisms.
Herein,
a
T‐In
2
Se
3
/M‐WS
/B‐WSe
heterojunction
photodetector
boasting
pronounced
gate‐tunability
devised,
achieving
remarkable
light
on/off
ratio
5.8
×
10
4
detectivity
1.1
13
Jones
at
V
gs
=
−25
V,
alongside
competitive
responsivity
gain
633
A
W
−1
1943
30
V.
Energy
band
analysis
determined
that
former
associated
with
synergy
cascaded
alignment
high
degree
depletion
effect,
while
latter
ascribed
intermediate
electron
reservoir
enabling
high‐efficiency
spacial
separation
photoexcited
electron−hole
pairs.
Leveraging
this
pivotal
sensing
component,
proof‐of‐concept
applications
spanning
broadband
imaging
automatic
driving
are
demonstrated.
This
study
presents
paradigm
constructing
2DLM‐based
photodetectors
outstanding
comprehensive
performance,
thereby
establishing
fascinating
platform
capable
catering
diverse
demands
next‐generation
industry.
Abstract
Low‐dimensional
van
der
Waals
materials
(vdWMs)
have
attracted
worldwide
interest
on
account
of
numerous
advantages
including
self‐passivated
surface,
high
carrier
mobility,
excellent
flexibility,
etc
.
Among
multiple
vdWMs,
Sb
2
Se
3
stands
out
due
to
its
light
absorption
coefficient,
environmentally
friendly
components,
stability,
and
abundant
reserve.
However,
limited
effective
wavelength
range
unscalable
preparation
been
obstinate
issues
standing
in
the
way
further
development.
Herein,
pulsed‐laser
deposition
(PLD)
has
developed
for
synthesizing
nanofilms,
wafer‐scale
realized.
The
PLD‐derived
photodetector
demonstrates
broadband
photoresponse
across
UV
NIR.
First‐principles
calculations
determined
that
this
is
because
formation
vacancies
can
result
a
reduction
bandgap.
Upon
635
nm
illumination,
an
optimal
responsivity
2.68
A
W
−1
achieved,
corresponding
external
quantum
efficiency
524%
specific
detectivity
1.34
×
10
12
Jones.
Furthermore,
device
manifests
short
response/recovery
time
≈2/1
ms.
Proof‐of‐concept
imaging
as
well
fitness
monitoring
(respiratory
rate
&
heart
rate)
Profited
from
scalable
preparation,
array
photodetectors
produced,
exhibiting
qualified
device‐to‐device
variation.
On
whole,
study
depicted
attractive
landscape
next‐generation
integrated
optoelectronics.
Nanoscale Horizons,
Journal Year:
2024,
Volume and Issue:
9(10), P. 1599 - 1629
Published: Jan. 1, 2024
The
applications
of
2D
material
photodetectors
in
extensive
fields,
including
imaging,
health
monitoring,
tracking,
logic
operation,
ultraviolet
communications,
automatic
driving,
and
acoustic
signal
detection,
have
been
introduced.
Journal of Applied Physics,
Journal Year:
2025,
Volume and Issue:
137(2)
Published: Jan. 8, 2025
As
an
elemental
crystal,
anisotropic
two-dimensional
(2D)
tellurium
(Te)
flakes
have
recently
garnered
significant
attention
due
to
their
exceptional
chemical
stability,
tunable
bandgap,
low
thermal
conductivity,
and
high
carrier
mobility.
To
further
investigate
the
properties
of
Te
nanoflakes,
a
rapid
effective
method
determining
crystal
axes
is
essential.
In
this
study,
it
demonstrated
that
intensity
Raman-active
mode
in
nanoflakes
exhibits
laser-polarization-dependence,
varying
periodically
with
polarization
angle.
The
axis
can
be
identified
using
angle-resolved
polarized
Raman
spectroscopy.
Specifically,
A1
highest
when
incident
light
along
[12¯10]
direction
lowest
[0001]
direction.
This
identification
via
spectroscopy
verified
by
transmission
electron
microscopy
measurements.
addition,
theoretical
simulations
reveal
scattering
closely
associated
interference
effect
multilayer
stacking
system,
as
well
absorption
electron–phonon
coupling
nanoflakes.
discovery
not
only
provides
for
locating
but
also
offers
new
insights
into
phenomenon
materials
beyond
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 19, 2025
Abstract
Polarization
is
an
important
property
of
light
that
provides
some
additional
information
about
the
such
as
polarizability
and
phase.
With
rise
polarized
photodetectors,
detection
may
bring
a
new
way
to
better
understand
information.
Recent
works
have
shown
polarization
detectors
demonstrated
excellent
potential
in
field
neuromorphology,
which
great
significance
for
further
development
artificial
intelligence.
This
review
comprehensively
summarizes
present
research
status
detectors,
including
linearly
(LPPDs)
circularly
(CPPDs).
In
order
assess
current
state
detecting
linearly/circularly
light,
operating
principles
performance
parameters
are
presented.
Next,
universal
semiconductors
used
LPPDs
CPPDs
systematically
classified
summarized.
Based
on
this,
applications
fields
intelligence,
imaging,
digital
signal
processing
then
reviewed.
Finally,
challenging
opportunities
discussed,
followed
by
overview
future
prospects
this
promising
field.
CrystEngComm,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Co-solvent
exfoliation
of
quasi-1D
van
der
Waals
Nb
2
Pd
3
Se
8
using
ethanol–water
and
isopropanol–water
mixtures
as
a
substitute
to
the
conventional,
toxic,
high-boiling
point
NMP
solvent.
Materials Horizons,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
The
Bi
2
(Se,S)
3
ternary
nanowire
photodetector
shows
excellent
broadband
photoelectric
performance,
polarization-sensitive
detection
and
imaging
ability.
Moreover,
the
device
exhibits
an
NPC
phenomenon
which
is
used
to
simulate
infrared
encoder.
Advanced Optical Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 26, 2025
Abstract
Low‐symmetry
layered
materials
are
emerging
as
promising
platforms
for
polarization‐driven
nanophotonics.
Understanding
their
nonequilibrium
photoresponses,
especially
polarization
dependence,
is
not
only
essential
designing
high‐performance
devices
but
also
provides
new
anisotropic
light–matter
interactions.
Here,
unique
optical‐gap
shifts
presented
in
germanium
sulfide
(GeS)
using
ultrafast
differential
transmission
(DT)
microscopy.
Upon
pump
excitation,
bandgap
renormalization
and
lattice
heating
lead
to
overall
redshifts
optical
gaps.
However,
the
redshift
substantially
compensated
by
carrier‐induced
state
filling
at
band
edge
when
probe
light
polarized
along
armchair
(AC)
direction
of
crystal.
In
contrast,
perpendicular
zigzag
(ZZ)
polarization,
minimally
because
transition
predominantly
occurs
a
band‐nesting
region,
rather
than
edge.
As
result,
ZZ‐polarization
approximately
three
times
larger
that
AC‐polarization.
Furthermore,
this
dynamically
competes
with
isotropic
spectral
broadening,
forming
strong
dip
DT
spectrum,
which
significantly
higher
energies
over
time.
It
exhibits
an
≈80
meV
shift
ZZ‐polarization—nearly
These
findings
offer
insights
into
dynamics
low‐symmetry
materials,
highlighting
potential
