Advanced Optical Materials,
Journal Year:
2023,
Volume and Issue:
12(2)
Published: Sept. 28, 2023
Abstract
Ultrahigh‐contrast
photodetection
with
low
background
noise
is
of
critical
importance
for
accurate
image‐sensing
in
deep‐sea
and
deep‐space
exploration.
The
state‐of‐the‐art
silicon
III–V
semiconductor‐based
photodetectors
usually
require
extended
exposure
to
incident
light
high‐quality
sensing
darkness,
which
unfortunately
results
large
room
temperature
dark
currents
(
RT
‐
I
)
deteriorates
the
expected
imaging
contrasts.
Herein,
a
high‐performance
violet
phosphorus
(VP)
phototransistor
reported
by
constructing
trap‐free
interface
between
VP
channel
hexagonal
boron
nitride
h
‐BN)
dielectric
via
perfect
van
der
Waals
stacking.
device
shows
an
extremely
80
fA
gate‐tunable
high
ON/OFF
ratio
over
10
5
,
2–4
orders
magnitude
superior
that
conventional
counterparts.
A
photodetector
array
has
been
fabricated
demonstrate
high‐contrast
capability.
findings
effectiveness
ultrahigh‐contrast
applications,
while
also
presenting
exciting
opportunities
enhance
qualities
through
architectures
optoelectronics.
Advanced Science,
Journal Year:
2023,
Volume and Issue:
10(22)
Published: May 25, 2023
Abstract
Neuromorphic
computing
can
efficiently
handle
data‐intensive
tasks
and
address
the
redundant
interaction
required
by
von
Neumann
architectures.
Synaptic
devices
are
essential
components
for
neuromorphic
computation.
2D
phosphorene,
such
as
violet
show
great
potential
in
optoelectronics
due
to
their
strong
light‐matter
interactions,
while
current
research
is
mainly
focused
on
synthesis
characterization,
its
application
photoelectric
vacant.
Here,
authors
combined
phosphorene
molybdenum
disulfide
demonstrate
an
optoelectronic
synapse
with
a
light‐to‐dark
ratio
of
10
6
,
benefiting
from
significant
threshold
shift
charge
transfer
trapping
heterostructure.
Remarkable
synaptic
properties
demonstrated,
including
dynamic
range
(
DR
)
>
60
dB,
128
(7‐bit)
distinguishable
conductance
states,
electro‐optical
dependent
plasticity,
short‐term
paired‐pulse
facilitation,
long‐term
potentiation/depression.
Thanks
excellent
multi‐states,
high‐precision
image
classification
accuracies
95.23%
79.65%
achieved
MNIST
complex
Fashion‐MNIST
datasets,
which
close
ideal
device
(95.47%,
79.95%).
This
work
opens
way
use
emerging
provides
new
strategy
building
computing.
Journal of Materials Science,
Journal Year:
2023,
Volume and Issue:
58(6), P. 2689 - 2699
Published: Jan. 22, 2023
Abstract
We
report
the
fabrication,
electrical,
and
optical
characterizations
of
few-layered
black
phosphorus
(BP)-based
field-effect
transistor
(FET).
The
fabricated
device
exhibits
a
p-type
transport
with
hole
mobility
up
to
175
cm
2
V
−1
s
at
ds
=
1
mV.
transfer
characteristics
show
large
hysteresis
width
that
depends
linearly
on
gate
voltage
decreases
increasing
drain
bias.
also
ensures
non-volatile
charge-trap
memory
behaviour,
stable
long
retention
time.
material’s
photodetection
capabilities
enhance
functionality
making
it
controllable
by
light.
photocurrent
was
observed
be
light
incident
power
exposure
As
photodetector,
reaches
responsivity
detectivity
340
mA
W
6.52
×
10
11
Jones
under
white
80
$$\mathrm{mW}$$
mW
,
respectively.
Time-resolved
measurements
provide
evidence
single
exponential
decay
process
through
deep
intra-gap
states.
Our
results
highlight
potential
few
layers
BP
as
nanomaterial
for
field-effect,
memory,
optoelectronic
devices.
Graphical
Journal of the American Chemical Society,
Journal Year:
2023,
Volume and Issue:
145(14), P. 8218 - 8230
Published: March 30, 2023
The
discovery
of
novel
large
band
gap
two-dimensional
(2D)
materials
with
good
stability
and
high
carrier
mobility
will
innovate
the
next
generation
electronics
optoelectronics.
A
new
allotrope
2D
violet
phosphorus
P11
was
synthesized
via
a
salt
flux
method
in
presence
bismuth.
Millimeter-sized
crystals
violet-P11
were
collected
after
removing
DI
water.
From
single-crystal
X-ray
diffraction,
crystal
structure
determined
to
be
monoclinic
space
group
C2/c
(no.
15)
unit
cell
parameters
=
9.166(6)
Å,
b
9.121(6)
c
21.803(14)Å,
β
97.638(17)°,
volume
1807(2)
Å3.
differences
between
violet-P11,
violet-P21,
fibrous-P21
are
discussed.
can
mechanically
exfoliated
down
few
layers
(∼6
nm).
Photoluminescence
Raman
measurements
reveal
thickness-dependent
nature
flakes
stable
ambient
air
for
at
least
1
h,
exhibiting
moderate
stability.
bulk
exhibit
excellent
stability,
being
many
days.
optical
is
2.0(1)
eV
measured
by
UV-Vis
electron
energy-loss
spectroscopy
measurements,
agreement
density
functional
theory
calculations
which
predict
that
direct
semiconductor
gaps
1.8
1.9
monolayer,
respectively,
mobility.
This
largest
among
known
single-element
layered
thus
attractive
various
optoelectronic
devices.
ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
6(6), P. 4726 - 4733
Published: March 3, 2023
Two-dimensional
(2D)
layered
nanosheets
of
violet
phosphorene
(VP)
have
great
potential
in
optoelectronic
applications
owing
to
their
unique
electronic,
mechanical,
and
optical
properties.
Herein,
the
nonlinear
(NLO)
properties
liquid-phase-exfoliated
(LPE)
VP
based
on
a
side-polished
D-shaped
fiber
(DSF)
were
experimentally
investigated
by
homemade
dual-balance
detection
system
at
near-infrared
band.
A
strong
saturable
absorption
response
was
observed.
The
corresponding
modulation
depth
saturation
intensity
determined
as
∼1.57
∼68.1
MW/cm2,
respectively.
As
an
application,
VP-DSF
absorber
mode-locked
erbium-doped
laser
realized
for
first
time,
generating
ultrashort
pulses
with
pulse
width
799
fs.
Moreover,
stable
soliton
molecule
mode-locking
time
interval
816
fs
20.5
ps,
respectively,
obtained
adjusting
polarization
state
same
cavity.
experimental
results
demonstrated
use
VP-based
nanomaterials
ultrafast
photonics
applications.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(15), P. 19214 - 19224
Published: April 5, 2024
Near-infrared
(NIR)
polarization
photodetectors
with
two-dimensional
(2D)
semiconductors
and
their
van
der
Waals
(vdW)
heterostructures
have
presented
great
impact
for
the
development
of
a
wide
range
technologies,
such
as
in
optoelectronics
communication
fields.
Nevertheless,
lack
photogenerated
charge
carrier
at
device's
interface
leads
to
poor
collection
efficiency
low
linear
dichroism
ratio,
hindering
achievement
high-performance
optoelectronic
devices
multifunctionalities.
Herein,
we
present
type-II
violet
phosphorus
(VP)/InSe
vdW
heterostructure
that
is
predicted
via
density
functional
theory
calculation
confirmed
by
Kelvin
probe
force
microscopy.
Benefiting
from
band
alignment,
VP/InSe
heterostructure-based
photodetector
achieves
excellent
photodetection
performance
responsivity
(R)
182.8
A/W,
detectivity
(D*)
7.86
×
1012
Jones,
an
external
quantum
(EQE)
11,939%
under
1064
nm
photon
excitation.
Furthermore,
can
be
enhanced
manipulating
device
geometry
inserting
few
layers
graphene
between
VP
InSe
(VP/Gr/InSe).
Remarkably,
VP/Gr/InSe
shows
competitive
sensitivity
2.59
integrated
image
sensor.
This
work
demonstrates
will
effective
promising
NIR
optoelectronics.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(32)
Published: April 4, 2024
Abstract
Phosphorene,
a
2D(two‐dimensional)
material,
holds
immense
promise
in
various
applications
due
to
its
unique
properties.
Here,
comprehensive
overview
of
their
recent
synthesis
progresses,
with
specific
focus
on
three
phosphorene
varieties:
black
phosphorene,
blue
and
violet
is
provided.
Black
given
versatile
properties,
extensively
studied,
but
the
challenges
persist
achieving
scalable
production
high
quality
controllable
thicknesses.
The
involves
epitaxial
methods
results
relatively
small
structures,
limiting
practical
applications.
Notably,
successful
remains
limited,
achieved
only
through
mechanical
liquid‐phase
exfoliation
(LPE)
methods.
Despite
significant
progression
synthesis,
critical
need
emphasized
for
cost‐effective
easily
method
capable
efficiently
managing
thickness
phosphorene.
challenges,
such
as
scalability
issues
presence
impurities,
highlight
complexity
preparation
review
emphasizes
importance
continued
scientific
engagement
overcome
these
obstacles
advance
research
topic.
In
essence,
while
shows
great
potential,
unlocking
full
range
requires
further
innovation
methodologies.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(18), P. 11988 - 12009
Published: April 23, 2024
Periodontitis,
a
chronic
oral
disease
instigated
by
bacteria,
severely
compromises
human
health.
The
prevailing
clinical
treatment
for
periodontitis
involves
mechanical
scraping
in
conjunction
with
antibiotics.
Phototherapy
is
employed
to
rapidly
remove
the
bacteria
and
achieve
treatment,
effectively
circumventing
adverse
effects
associated
traditional
therapies.
Constructing
2D/2D
van
der
Waals
(VDW)
heterojunctions
key
strategy
obtaining
excellent
photocatalytic
activity.
Herein,
violet
phosphorus
(VP)/Ti
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 24, 2024
Abstract
Recently,
2D
violet
phosphorus
(VP),
a
new
kind
of
allotrope
has
attained
significant
attention
owing
to
its
remarkable
electronic,
optical,
and
magnetic
characteristics.
Tunable,
large
direct
bandgap,
high
charge
carrier
mobility,
optical
absorption
make
it
potential
candidate
for
realizing
photoelectronic
applications.
VP
demonstrates
unique
electronic
structure,
chemical
stability,
strong
light‐matter
interaction,
thermal
stability
that
can
be
utilized
assembling
intelligent
devices.
This
review
article
provides
comprehensive
investigations
the
latest
synthesis
techniques
employed
develop
including
structural
characterizations,
degradation
mechanisms.
Furthermore,
this
diverse
applications
in
optoelectronics,
photodetectors,
polarization
detection,
imaging
systems,
neuromorphic
optoelectronic
devices,
many
others.
Finally,
challenges
future
research
directions
associated
with
terms
optoelectronics
are
discussed.
Overall,
as
presented,
offers
an
extensive
study
VP,
covering
synthesis,
insights
mechanisms,
aim
stimulating
further
development
growing
field.
