Advanced Functional Materials,
Год журнала:
2020,
Номер
31(3)
Опубликована: Окт. 7, 2020
Abstract
Polarized
photodetection
based
on
anisotropic
two‐dimensional
materials
display
promising
prospects
for
practical
application
in
optical
communication
and
optoelectronic
fields.
However,
most
of
the
reported
polarized
are
limited
by
lack
valid
tunable
strategy
low
linear
dichroism
ratio.
A
peculiar
noble
metal
dichalcogenide—PdSe
2
with
a
puckered
pentagonal
structure
abnormal
conversion—potentially
removes
these
restrictions
is
demonstrated
this
study.
Herein,
azimuth‐dependent
reflectance
difference
microscopy
combined
electrical
transport
measurements
indicate
strong
in‐plane
properties
PdSe
.
Remarkably,
typical
polarization‐resolved
exhibits
characteristics
dichroic
ratio
up
to
≈1.8
at
532
nm
≈2.2
369
nm,
their
dominant
polarization
orientation
differs
90°
corresponding
‐axis
b
‐axis,
respectively.
The
unique
selection
behavior
polarization‐dependent
can
be
attributed
intrinsic
conversion.
results
make
2D
platform
investigating
structure–property
correlations
integrated
applications
novel
polarization‐sensitive
photodetection.
ACS Nano,
Год журнала:
2021,
Номер
15(7), С. 10775 - 10981
Опубликована: Июнь 17, 2021
Metal-halide
perovskites
have
rapidly
emerged
as
one
of
the
most
promising
materials
21st
century,
with
many
exciting
properties
and
great
potential
for
a
broad
range
applications,
from
photovoltaics
to
optoelectronics
photocatalysis.
The
ease
which
metal-halide
can
be
synthesized
in
form
brightly
luminescent
colloidal
nanocrystals,
well
their
tunable
intriguing
optical
electronic
properties,
has
attracted
researchers
different
disciplines
science
technology.
In
last
few
years,
there
been
significant
progress
shape-controlled
synthesis
perovskite
nanocrystals
understanding
applications.
this
comprehensive
review,
having
expertise
fields
(chemistry,
physics,
device
engineering)
joined
together
provide
state
art
overview
future
prospects
nanocrystal
research.
ACS Nano,
Год журнала:
2019,
Номер
13(9), С. 9907 - 9917
Опубликована: Июль 30, 2019
Polarization-sensitive
photodetection
in
a
broad
spectrum
range
is
highly
desired
due
to
the
great
significance
military
and
civilian
applications.
Palladium
diselenide
(PdSe2),
newly
explored
air-stable,
group
10
two-dimensional
(2D)
noble
metal
dichalcogenide
with
puckered
pentagonal
structure,
holds
promise
for
polarization-sensitive
photodetection.
Herein,
we
report
polarization-sensitive,
broadband,
self-powered
photodetector
based
on
graphene/PdSe2/germanium
heterojunction.
Owing
enhanced
light
absorption
of
mixed-dimensional
van
der
Waals
heterojunction
effective
carrier
collection
graphene
transparent
electrode,
exhibits
superior
device
performance
terms
large
photoresponsivity,
high
specific
detectivity,
fast
response
speed
follow
nanosecond
pulsed
signal,
broadband
photosensitivity
ranging
from
deep
ultraviolet
(DUV)
mid-infrared
(MIR).
Significantly,
an
ultrahigh
polarization
sensitivity
112.2
achieved,
which
represents
best
result
2D
layered
material-based
photodetectors.
Further,
demonstrated
high-resolution
imaging
device.
This
work
reveals
potential
PdSe2
high-performance,
Advanced Materials,
Год журнала:
2020,
Номер
33(7)
Опубликована: Дек. 21, 2020
Abstract
Metal
halide
perovskites
(MHPs)
have
been
a
hot
research
topic
due
to
their
facile
synthesis,
excellent
optical
and
optoelectronic
properties,
record‐breaking
efficiency
of
corresponding
devices.
Nowadays,
the
development
miniaturized
high‐performance
photodetectors
(PDs)
has
fueling
demand
for
novel
photoactive
materials,
among
which
low‐dimensional
MHPs
attracted
burgeoning
interest.
In
this
report,
photodetection
performance,
stability
MHPs,
including
0D,
1D,
2D
layered
nonlayered
nanostructures,
as
well
heterostructures
are
reviewed.
Recent
advances
in
synthesis
approaches
summarized
key
concepts
understanding
properties
related
PD
applications
introduced.
More
importantly,
recent
progress
PDs
based
on
is
presented,
strategies
improving
performance
perovskite
highlighted.
By
discussing
advances,
strategies,
existing
challenges,
report
provides
perspectives
MHP‐based
future.
Nature Communications,
Год журнала:
2019,
Номер
10(1)
Опубликована: Апрель 26, 2019
Abstract
Circularly
polarized
light
(CPL)
detection
is
required
in
various
fields
such
as
drug
screening,
security
surveillance
and
quantum
optics.
Conventionally,
CPL
photodetector
needs
the
installation
of
optical
elements,
imposing
difficulties
for
integrated
flexible
devices.
The
established
detectors
without
elements
rely
on
chiral
organic
semiconductor
metal
metamaterials,
but
they
suffer
from
extremely
low
responsivity.
Organic-inorganic
hybrid
materials
combine
CPL-sensitive
absorption
induced
by
organics
efficient
charge
transport
inorganic
frameworks,
providing
an
option
direct
detection.
Here
we
report
detector
using
organic-inorganic
perovskites,
obtain
a
device
with
responsivity
797
mA
W
-1
,
detectivity
7.1
×
10
11
Jones,
3-dB
frequency
150
Hz
one-month
stability,
competitive
combined
feature
circularly
Thanks
to
solution
processing,
further
demonstrate
devices
polyethylene
terephthalate
substrate
comparable
performance.
Abstract
Hybrid
organic–inorganic
perovskite
materials
garner
enormous
attention
for
a
wide
range
of
optoelectronic
devices.
Due
to
their
attractive
optical
and
electrical
properties
including
high
absorption
coefficient,
carrier
mobility,
long
diffusion
length,
perovskites
have
opened
up
great
opportunity
performance
photodetectors.
This
review
aims
give
comprehensive
summary
the
significant
results
on
perovskite‐based
photodetectors,
focusing
relationship
among
structures,
device
configurations,
photodetecting
performances.
An
introduction
recent
progress
in
various
structure‐based
photodetectors
is
provided.
The
emphasis
placed
correlation
between
structure
performance.
Next,
developments
bandgap‐tunable
hybrid
built
from
heterostructures
are
highlighted.
Then,
effective
approaches
enhance
stability
photodetector
presented,
followed
by
flexible
self‐powered
Finally,
previous
given,
major
challenges
that
need
be
addressed
future
outlined.
A
research
status
hoped
push
forward
development
this
field.
Abstract
Group‐10
transition
metal
dichalcogenides
(TMDs)
with
distinct
optical
and
tunable
electrical
properties
have
exhibited
great
potential
for
various
optoelectronic
applications.
Herein,
a
self‐powered
photodetector
is
developed
broadband
response
ranging
from
deep
ultraviolet
to
near‐infrared
by
combining
FA
1−
x
Cs
PbI
3
perovskite
PdSe
2
layer,
newly
discovered
TMDs
material.
Optoelectronic
characterization
reveals
that
the
as‐assembled
/perovskite
Schottky
junction
sensitive
light
illumination
200
1550
nm,
highest
sensitivity
centered
at
≈800
nm.
The
device
also
shows
large
on/off
ratio
of
≈10
4
,
high
responsivity
(
R
)
313
mA
W
−1
decent
specific
detectivity
D
*)
13
Jones,
rapid
speed
3.5/4
µs.
These
figures
merit
are
comparable
or
much
better
than
most
previously
reported
detectors.
In
addition,
exhibits
obvious
polarized
light,
polarization
6.04.
Finally,
detector
can
readily
record
five
“P,”
“O,”
“L,”
“Y,”
“U”
images
sequentially
produced
808
results
suggest
present
photodetectors
may
be
useful
assembly
system
applications
in
near
future.
Advanced Functional Materials,
Год журнала:
2017,
Номер
27(23)
Опубликована: Апрель 18, 2017
Recently,
all‐inorganic
cesium
lead
halide
(CsPbX
3
,
X
=
Cl,
Br,
I)
perovskite
nanocrystals
have
drawn
much
attention
because
of
their
outstanding
photophysical
properties
and
potential
applications.
In
this
work,
a
simple
efficient
solvothermal
approach
to
prepare
CsPbX
with
tunable
bright
photoluminescent
(PL)
properties,
controllable
composition,
morphology
is
presented.
nanocubes
are
successfully
prepared
emission
high
PL
quantum
yield
up
80%
covering
the
full
visible
range
narrow
line
widths
(from
12
36
nm).
More
importantly,
ultrathin
(X
Cl/Br,
Br/I)
nanowires
(with
diameter
as
small
≈2.6
nm)
can
be
in
very
morphological
(almost
100%).
A
strong
confinement
effect
observed
nanowires,
which
both
absorption
peaks
shift
shorter
wavelength
compared
bulk
bandgap.
The
reaction
parameters,
such
temperature
precursors,
varied
investigate
growth
process.
white
light‐emitting
device
prototype
wide
color
gamut
120%
National
Television
System
Committee
standard
has
been
demonstrated
by
using
CsPbBr
green
light
source.
method
study
provides
way
high‐quality
nanocrystals.
