Journal of Vacuum Science & Technology B Nanotechnology and Microelectronics Materials Processing Measurement and Phenomena,
Journal Year:
2024,
Volume and Issue:
42(2)
Published: Feb. 21, 2024
We
study
the
interaction
with
photodetectors
of
near
infrared
(NIR)
laser
light
power
P
in
range
mW
and
period
τ
=
3.55
fs
(wavelength
λ
1064
nm,
frequency
ν
0.28
PHz).
fabricate
by
depositing
different
sequences
thin
TiO2/TiN
nano-laminates
onto
glass
substrates
using
atomic
layer
deposition
(ALD).
To
evaluate
photodetector's
performance,
we
assume
Pτ
to
be
energy
transferred
them
from
NIR
light,
allowing
us
extract
inductance
L
at
zero
bias
voltage,
explicitly
link
photocurrent
ΔI,
or
photovoltage
ΔV,
generated
photodetector.
Such
a
is
observed
literature,
but
not
justified.
further
Pλ
λ/lact
effective
illuminating
photodetector
size
lact.
This
assumption
enables
determine
current
responsivity
(πI),
noise
equivalent
(NEP),
detectivity
(D).
establish
whether
correctly
account
for
involved
compare
L,
πI,
NEP,
D
our
corresponding
parameters
state-of-the-art
(SOA)
devices
reported
literature.
The
comparison
indicates
that
are
SOA
devices,
thus
validating
assumptions
on
Pλ.
Finally,
findings
provide
suggestions
how
improve
ALD
as
suitable
active
materials
photodetectors.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(46)
Published: July 7, 2023
Abstract
Both
photodetectors
(PDs)
and
optoelectronic
synaptic
devices
(OSDs)
are
converting
light
signals
into
electrical
responses.
Optoelectronic
based
on
organic
semiconductors
halide
perovskites
have
aroused
tremendous
research
interest
owing
to
their
exceptional
optical/electrical
characteristics
low‐cost
processability.
The
heterojunction
formed
between
can
modify
the
exciton
dissociation/recombination
efficiency
modulate
charge‐trapping
effect.
Consequently,
semiconductor/halide
perovskite
heterojunctions
endow
PDs
OSDs
with
high
photo
responsivity
ability
simulate
functions
respectively,
making
them
appropriate
for
development
of
energy‐efficient
artificial
visual
systems
sensory
recognition
functions.
This
article
summarizes
recent
advances
in
this
field.
physical/chemical
properties
preparation
methods
briefly
introduced.
Then
heterojunctions,
as
well
innovative
applications,
systematically
presented.
Finally,
some
prospective
challenges
probable
strategies
future
discussed.
Abstract
Broadband
near‐infrared
(NIR)
phosphor
converted
light
emitting
diodes
(pc‐LEDs)
are
novel
compact
sources
that
enable
portable
devices
for
substance
detection.
However,
to
achieve
such
efficient
pc‐LEDs
is
still
a
challenge
due
lack
of
phosphors.
In
this
paper,
Stokes
shift
as
an
efficiency
predictor
emphasized.
Cr
3+
activated
Ca
2
LuZr
Al
3
O
12
(CLZA)
garnet
phosphor,
decreases
from
2990
2854
cm
−1
upon
substituting
Ca‐Zr
with
Lu‐Al.
As
result,
electron–phonon
coupling
related
nonradiative
process
reduced.
The
external
quantum
significantly
enhanced
47.4%,
and
the
fabricated
NIR
pc‐LED
offers
33.7%
@10
mA
electro‐optical
efficiency.
results
can
advance
development
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(21)
Published: Feb. 25, 2023
Abstract
This
research
demonstrates
a
state‐of‐the‐art
vertical‐transport
photodetector
with
an
n‐type
3D
MAPbI
3
/p‐type
quasi‐2D
(Q‐2D)
BA
2
MA
Pb
I
10
perovskite
heterojunction.
structure
introduces
≈0.6
V
built‐in
electric
field
at
the
n‐p
junction
that
greatly
improves
characteristics
of
photodetector,
and
presence
Q‐2D
on
surface
life.
The
electrical
polarities
layers
are
simply
controlled
by
self‐constituent
doping,
making
clearly
defined
characteristics.
Doctor‐blade
coating
is
used
to
fabricate
large
area.
materials
highly
oriented
(040)
(n
=
2,3)
planes
near
surface,
(111)
preferred
mixed
high
index
4,5)
found
3D/Q‐2D
interface.
stacking
interface
beneficial
for
carrier
extraction
transport,
yielding
external
quantum
efficiency
77.9%,
lifetime
long
as
295.7
ns,
responsibility
0.41
A
W
−1
.
low
dark
current
density
6.2
×
−7
mA
cm
−2
detectivity
2.82
13
Jones
obtained.
Rise
time
fall
fast
1.33
10.1
µs,
respectively.
results
show
application
potential
photodetectors.
Advanced Optical Materials,
Journal Year:
2023,
Volume and Issue:
12(14)
Published: Dec. 7, 2023
Abstract
Poly(3,4‐ethylenedioxythiphene):poly(styrene
sulfonate)
(PEDOT:PSS)
is
widely
used
as
hole
transport
layer
in
photodiodes
due
to
its
deep
work
function,
flexibility,
low
cost,
and
commercialization
potentials.
However,
organic
photodetectors
(OPDs)
using
commercial
PEDOT:PSS
(C‐PEDOT:PSS)
interlayers
usually
suffer
from
high
noise
currents.
Here,
a
simple
dilution‐induced
strategy
proposed
for
constructing
an
ultrathin
self‐assembled
PEDOD:PSS
(D‐PEDOT:PSS).
Dilution‐induced
chain
disentanglement
leads
smaller
grain
sizes,
which
beneficial
reduce
defects
enhances
selective
charge
transport.
This
enables
the
fabrication
of
near‐infrared
PM6:Y6
with
three
orders
magnitude
lower
ultra‐low
dark
current
(<1.5×10
−10
A
cm
−2
)
one
order
spectral‐noise
density
(2.1×10
−14
Hz
−1/2
compared
devices
untreated
PEDOT:PSS,
at
‐0.1
V
applied
bias.
With
enhanced
responsivity,
shot‐noise‐limited
detectivity
increases
by
35
times.
An
imaging
system
OPDs
sensing
pixel
has
achieved
high‐contrast
images,
demonstrating
potential
OPDs.
The
universality
this
enhance
performance
further
demonstrated
through
additional
donor‐acceptor
blends.
study
presents
effective
PEDOT:PSS‐based
provides
insights
into
correlation
between
interfacial
properties
Journal of Materials Chemistry C,
Journal Year:
2023,
Volume and Issue:
11(6), P. 2267 - 2272
Published: Jan. 1, 2023
A
near-infrared
aza-BODIPY
dye
is
developed
for
organic
photodetectors.
The
device
achieves
a
high
D*
value
and
fast-response
speed
of
0.5
μs.
Importantly,
our
work
innovatively
utilizes
the
high-performance
NIR
OPD
in
laser
microphone
system.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(15), P. 19318 - 19329
Published: April 5, 2024
Studies
indicated
that
two-dimensional
(2D)
metal
halide
perovskites
(MHPs)
embodied
with
three-dimensional
(3D)
MHPs
were
a
facile
way
to
realize
efficient
and
stable
perovskite
solar
cells
(PSCs)
photodetectors
(PPDs).
Here,
high-performance
PSCs
PPDs,
which
are
based
on
2D/3D
bilayer
thin
films,
where
the
2D
created
by
binary
conjugated
organic
cations,
reported.
Systemically
studies
reveal
above
novel
films
possess
an
enlarged
crystal
size,
balanced
charge
transport,
reduced
carrier
recombination,
smaller
charge-transfer
resistance,
accelerated
charge-extraction
process
compared
single
cation.
As
result,
film
exhibit
power
conversion
efficiency
of
22.76%.
Moreover,
unencapsulated
dramatically
enhanced
stability
those
In
addition,
PPDs
projected
detectivity
1016
cm
Hz1/2/W
linear
dynamic
range
108
dB
at
room
temperature.
Our
indicate
development
cation-based
incorporated
3D
is
simple
method
PPDs.
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(47)
Published: Sept. 17, 2022
Abstract
2D
perovskites
are
relatively
stable
but
possess
poor
charge
transport
compared
to
3D
perovskites.
To
boost
transport,
novel
mixed
with
developed,
where
Pb
2+
partially
substituted
by
the
heterovalent
neodymium
cations
(Nd
3+
)
within
both
and
(termed
Nd
‐substituted
2D:3D
Systematical
studies
reveal
that
larger
crystals,
superior
crystallinity,
suppressed
non‐radiative
recombination,
enhanced
balanced
As
a
result,
perovskite
photovoltaics
based
on
exhibit
power
conversion
efficiency
of
22.11%,
photoresponsibility
over
700
mA
W
−1
,
photodetectivity
4.29
×
10
14
cm
Hz
1/2
linear
dynamic
range
165
dB
at
room
temperature,
dramatically
boosted
stability.
These
results
demonstrate
that,
facile
way
is
developed
realize
high‐performance
through
