InfoMat,
Journal Year:
2022,
Volume and Issue:
4(3)
Published: Jan. 18, 2022
Abstract
Van
der
Waals
heterojunctions
are
fast‐emerging
quantum
structures
fabricated
by
the
controlled
stacking
of
two‐dimensional
(2D)
materials.
Owing
to
atomically
thin
thickness,
their
carrier
properties
not
only
determined
host
material
itself,
but
also
defined
interlayer
interactions,
including
dielectric
environment,
charge
trapping
centers,
and
angles.
The
abundant
constituents
without
limitation
lattice
constant
matching
enable
fascinating
electrical,
optical,
magnetic
in
van
toward
next‐generation
devices
photonics,
optoelectronics,
information
sciences.
This
review
focuses
on
energy
transfer
processes
dynamics
transition
metal
dichalcogenides
(TMDCs),
a
family
materials
with
strong
excitonic
effects
unique
valley
properties,
other
related
2D
such
as
graphene
hexagonal‐boron
nitride.
In
first
part,
we
summarize
ultrafast
heterojunctions,
its
experimental
evidence
theoretical
understanding,
excitons
at
TMDC
interfaces,
hot
injection
graphene/TMDCs
interface.
second
transfer,
both
Förster
Dexter
types,
reviewed
from
perspectives.
Finally,
highlight
typical
applications
photodetectors
challenges
opportunities
for
future
development
this
field.
Abstract
In
recent
years,
2D
layered
materials,
including
graphene,
topological
insulators,
transition
metal
dichalcogenides,
black
phosphorus,
MXenes,
graphitic
carbon
nitride,
and
metal‐organic
frameworks,
have
attracted
considerable
interest
due
to
their
potential
applications
in
the
fields
of
physics,
chemistry,
biology,
energy.
Their
rise
field
nonlinear
photonics
began
around
2009
has
become
an
important
research
direction.
Here,
synthesis
techniques,
optical
properties,
integration
strategies,
device
materials
are
reviewed.
terms
focus
is
on
saturable
absorption
Kerr
nonlinearity.
On
this
basis,
various
pulsed
lasers,
fiber
solid‐state
waveguide
related
phenomenon,
summarized.
addition,
novel
devices
using
such
as
modulators,
polarizers,
switchers,
even
all‐optical
device,
also
involved.
It
believed
that
development
will
continue
deepen,
thus
laying
a
good
foundation
for
its
practical
application.
Advanced Materials,
Journal Year:
2019,
Volume and Issue:
32(27)
Published: Oct. 14, 2019
Abstract
The
discovery
of
two‐dimensional
(2D)
materials
with
unique
electronic,
superior
optoelectronic,
or
intrinsic
magnetic
order
has
triggered
worldwide
interest
in
the
fields
material
science,
condensed
matter
physics,
and
device
physics.
Vertically
stacking
2D
distinct
electronic
optical
as
well
properties
enables
creation
a
large
variety
van
der
Waals
heterostructures.
diverse
vertical
heterostructures
open
unprecedented
opportunities
for
various
kinds
applications,
e.g.,
field‐effect
transistors,
ultrasensitive
infrared
photodetectors,
spin‐filtering
devices,
so
on,
which
are
inaccessible
conventional
Here,
current
status
heterostructure
applications
spintronic
memory/transistors
is
reviewed.
relevant
challenges
achieving
high‐performance
devices
presented.
An
outlook
into
future
development
integrated
optoelectronic
functionalities
also
provided.
Advanced Photonics,
Journal Year:
2022,
Volume and Issue:
4(01)
Published: Feb. 14, 2022
Time-varying
media
have
recently
emerged
as
a
new
paradigm
for
wave
manipulation,
thanks
to
thesynergy
between
the
discovery
of
novel,
highly
nonlinear
materials,
such
epsilon-near-zero
and
questfor
novel
applications,
magnet-free
nonreciprocity,
multi-mode
light
shaping,
ultrafast
switching.
Inthis
review
we
provide
comprehensive
discussion
recent
progress
achieved
with
photonic
metamaterials
whoseproperties
stem
from
their
modulation
in
time.
We
basic
concepts
underpinning
temporal
switching
itsrelation
spatial
scattering,
deploy
resulting
insight
time-crystals
emergentresearch
avenues
topological
non-Hermitian
physics.
then
extend
our
account
spa-tiotemporal
its
applications
synthetic
motion,
giant
anisotropy,
amplification
andother
effects.
Finally,
conclude
most
attractive
experimental
demonstrated,and
few
perspectives
on
emerging
trends
future
implementations
time-modulation
photonics.
Abstract
Van
der
Waals
(vdW)
heterostructures
based
on
transition
metal
dichalcogenides
(TMDs)
generally
possess
a
type-II
band
alignment
that
facilitates
the
formation
of
interlayer
excitons
between
constituent
monolayers.
Manipulation
in
TMD
vdW
holds
great
promise
for
development
excitonic
integrated
circuits
serve
as
counterpart
electronic
circuits,
which
allows
photons
and
to
transform
into
each
other
thus
bridges
optical
communication
signal
processing
at
circuit.
As
consequence,
numerous
studies
have
been
carried
out
obtain
deep
insight
physical
properties
excitons,
including
revealing
their
ultrafast
formation,
long
population
recombination
lifetimes,
intriguing
spin-valley
dynamics.
These
outstanding
ensure
with
good
transport
characteristics,
may
pave
way
potential
applications
efficient
devices
heterostructures.
At
present,
systematic
comprehensive
overview
exciton
relaxation,
transport,
is
still
lacking.
In
this
review,
we
give
description
discussion
these
frontier
topics
provide
valuable
guidance
researchers
field.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(13)
Published: Jan. 3, 2023
Abstract
Two‐dimensional
(2D)
transition
metal
dichalcogenides
(TMDs),
a
rising
star
in
the
post‐graphene
era,
are
fundamentally
and
technologically
intriguing
for
photocatalysis.
Their
extraordinary
electronic,
optical,
chemical
properties
endow
them
as
promising
materials
effectively
harvesting
light
catalyzing
redox
reaction
Here,
we
present
tutorial‐style
review
of
field
2D
TMDs
photocatalysis
to
educate
researchers
(especially
new‐comers),
which
begins
with
brief
introduction
fundamentals
along
synthesis
this
type
material,
then
look
deeply
into
merits
co‐catalysts
active
photocatalysts,
followed
by
an
overview
challenges
corresponding
strategies
photocatalysis,
finally
ahead
topic.
Nano Letters,
Journal Year:
2019,
Volume and Issue:
19(7), P. 4518 - 4526
Published: June 3, 2019
Molecular-scale
modulation
of
interfaces
between
different
unilamellar
nanosheets
in
superlattices
is
promising
for
efficient
catalytic
activities.
Here,
three
kinds
from
alternate
restacking
any
two
the
MoS2,
NiFe-layered
double
hydroxide
(NiFe-LDH),
and
graphene
are
systematically
investigated
electrocatalytic
water
splitting.
The
MoS2/NiFe-LDH
superlattice
exhibits
a
low
overpotential
210
110
mV
at
10
mA
cm-2
oxygen
evolution
reaction
(OER)
alkaline
hydrogen
(HER),
respectively,
superior
than
MoS2/graphene
NiFe-LDH/graphene
superlattices.
High
activity
stability
toward
overall
splitting
also
demonstrated
on
bifunctional
electrocatalyst,
outperforming
commercial
Pt/C-RuO2
couple.
This
outstanding
performance
can
be
attributed
to
optimal
adsorption
energies
both
HER
OER
intermediates
superlattice,
which
originates
strong
electronic
coupling
effect
heterointerfaces.
These
results
herald
interface
providing
approach
designing
advanced
electrocatalysts.
Chemical Society Reviews,
Journal Year:
2021,
Volume and Issue:
50(7), P. 4684 - 4729
Published: Jan. 1, 2021
To
harvest
the
unique
properties
offered
by
2D
HSs,
creation
of
well-defined
heterointerfaces
on
a
large
scale
is
prerequisite,
where
chemistry
and
nature
define
targeted
applications.
