Dalton Transactions,
Journal Year:
2023,
Volume and Issue:
52(40), P. 14649 - 14662
Published: Jan. 1, 2023
This
study
investigates
the
impacts
of
structure
and
composition
on
optical
electronic
properties
a
series
pyridinium-based
bismuth
iodide
complexes.
Organic
substrates
with
various
functional
groups,
such
as
4-aminopyridine
(4-Ampy),
4-methylpyridine
(4-Mepy),
4-dimethylaminopyridine
(4-Dmapy),
4-pyridinecarbonitrile
(4-CNpy)
different
electron-donating
electron-withdrawing
groups
at
para
position
pyridine
ring
were
employed.
Crystallographic
analysis
reveals
structures,
including
1D
chains
discrete
0D
motifs.
The
band
gap
these
materials,
identified
via
diffuse
reflectance
spectroscopy
(DRS)
verified
density
theory
(DFT)
calculations,
is
influenced
by
crystal
packing
stabilising
interactions.
Through
comprehensive
analysis,
Hirshfeld
surface
(HS)
void
assessment,
underscores
influence
noncovalent
intermolecular
interactions
packing.
Spectroscopic
evaluations
provide
insights
into
interactions,
elucidating
role
electron
donor
acceptor
substituents
within
lattice.
Thermogravimetric
differential
thermal
(TG-DTA)
indicates
structural
stability
up
to
250
°C.
Linear
sweep
voltammetry
(LSV)
significant
conductivity
in
range
10-20
mS
per
pixel
298.15
K.
X-ray
absorption
(XAS)
Bi
L3
edge
similar
oxidation
state
environment
across
all
samples,
underscoring
centres
surrounded
iodides.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(44)
Published: July 19, 2023
The
imitation
of
human
visual
memory
demands
the
multifunctional
integration
light
sensors
similar
to
eyes,
and
image
memory,
brain.
Although
humans
have
already
implemented
electronic
devices
with
functions,
these
require
a
combination
various
components
logical
circuits.
However,
perception
high-performance
information
storage
capabilities
into
single
device
achieve
remains
challenging.
In
this
study,
inspired
by
function
dual-functional
perovskite-based
photodetector
(PD)
memristor
are
designed
realize
capacities.
As
PD,
it
realizes
an
ultrahigh
self-powered
responsivity
276
mA
W-1
,
high
detectivity
4.7
×
1011
Jones
(530
nm;
intensities,
2.34
mW
cm-2
),
rectification
ratio
≈100
(±2
V).
memristor,
on/off
(≈105
ultralow
power
consumption
3
10-11
W,
low
setting
voltage
(0.15
V),
long
retention
time
(>7000
s)
realized.
Moreover,
has
capacity
perceive
remember
paths
store
data
good
cyclic
stability.
This
exhibits
perceptual
erasable
which
provides
new
opportunities
for
mimicking
in
future
applications.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 13, 2025
Abstract
Ultraviolet
band
C
photodetectors
(UVC
PDs),
which
can
convert
the
UVC
light
(200–280
nm)
signals
into
detectable
signals,
have
received
tremendous
attention
due
to
their
wide
applications
in
bio‐medicine,
communications,
and
imaging
fields.
However,
current
research
primarily
focuses
on
either
conversion
of
electrical
or
its
visible
signals.
Here,
a
flexible
dual‐detectable
PD
based
Ca
2
Nb
3
O
10
nanosheets
CsCu
I
film
is
reported,
simultaneously
achieving
visual
detection
for
invisible
light.
The
exhibits
exceptional
self‐powered
(270
nm;
1.87
mW
cm
−2
)
abilities
with
high
responsivity
(R)
16.7
mA
W
−1
,
an
impressive
detectivity
6.1
×
11
Jones,
on/off
ratio
3789,
ultra‐high
UVC/UVA
(R
270
/R
360
rejection
2.1
5
.
shows
great
application
potential
safety
communication
real‐time
imaging.
This
work
proposes
new
type
through
material
selection
structural
design,
thereby
inspiring
novel
ideas
enhance
convenience
practicality
photodetection.
ACS Applied Electronic Materials,
Journal Year:
2024,
Volume and Issue:
6(5), P. 3039 - 3061
Published: April 26, 2024
Metal
halide
perovskites
(MHPs)
have
made
incredible
progress
in
the
field
of
optoelectronic
devices
such
as
light-emitting
diodes,
solar
cells,
photodetectors,
and
transistors.
Therein,
ion
migration
widely
exists
perovskite-based
may
affect
device
performance
working
stability.
Many
studies
demonstrated
that
generation
defects
MHPs
been
considered
main
reason
for
poor
perovskite
field-effect
transistors
(PeFETs),
related
to
complex
physicochemical,
electronic,
photoelectric
properties.
However,
origin
characterization
methods
migration-related
mechanisms
PeFETs
are
still
unclear
date.
In
this
review,
theoretical
experimental
issues
systematically
discussed.
We
begin
with
a
brief
description
perovskite,
including
channels
migration,
visualized
migration.
Sequentially,
influence
on
is
analyzed
detail.
Finally,
we
provide
an
outlook
current
challenges
future
opportunities
emerging
field.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 29, 2025
Abstract
Emerging
copper‐based
lead‐free
perovskites
have
garnered
significant
attention
for
ultraviolet
(UV)
photodetection
due
to
their
atmospheric
stability
and
optoelectronic
properties.
However,
practical
applications
are
hindered
by
low
carrier
density
limited
device
performance.
In
this
work,
a
breakthrough
is
reported
in
synthesizing
ultra‐long
1D
double
perovskite
CsAg
x
Cu
2‐x
I
3
(0≤x≤2)
single
crystals
(SCs)
via
an
anti‐solvent
recrystallization
method.
The
SCs
achieve
unprecedented
lengths
of
2.2
cm
0.4
1.6
2
(CAI123),
setting
new
benchmarks
Cu/Ag‐based
perovskites.
By
tuning
the
Ag‐doping
ratio,
bandgap
continuously
modulated
from
3.60
3.24
eV,
enabling
tailored
responses.
optimized
‐based
photodetector
exhibits
exceptional
performance
at
360
nm,
with
peak
responsivity
82.5
mA
W
−1
high
detectivity
1.3
×
10
12
Jones
(@
3V;
light
intensity:
2.8
mW
−2
),
superior
than
CsCu
(20.7
)
CAI123
(15.8
).
Notably,
detector
array
demonstrates
pioneering
UV
imaging
memory
capabilities,
retaining
patterns
over
s
slow
release
self‐trapped
defect‐related
states.
This
work
not
only
advances
synthesis
eco‐friendly
but
also
unlocks
novel
functionalities
next‐generation
optoelectronics
sensing,
imaging,
devices.
Traditional
optical
communication
systems
are
constrained
by
fixed
photoresponse
values
and
light
intensity,
significantly
impairing
the
potential
for
data
transmission
protection.
Here,
a
single-band
bipolar-response
perovskite
self-powered
photodetector
is
demonstrated
on
(PEA)2PbI4/BaTiO3/Si
heterojunction.
By
employing
BaTiO3
as
intrinsic
layer,
device
demonstrates
low
dark
current
order
of
10-12
A
at
5
V
bias.
When
functions
ferroelectric
variation
in
depolarization
field
not
only
achieves
multilevel
modulation
magnitude
but
also
reverses
sign.
Leveraging
bipolar
characteristics
device,
secure
system
has
been
developed,
featuring
dual-channel
signal
reception
specifically
designed
information
transmission.
One
channel
designated
receiving
encrypted
information,
while
other
receives
key
information.
The
needs
to
identify
positive
negative
input
signals
with
arbitrary
intensity
without
distinguishing
strength
values.
accurate
retrieval
transmitted
contingent
upon
application
an
encryption
algorithm,
thereby
enhancing
security
system.
This
work
provides
novel
perspectives
realization
more
reliable
systems.
ACS Omega,
Journal Year:
2023,
Volume and Issue:
8(38), P. 35343 - 35350
Published: Sept. 15, 2023
Al-doped
ZnO
(AZO)
thin
films
are
effective
n-type
semiconductors
for
ultraviolet
(UV)
detection
because
of
their
low
cost,
high
electron
mobility,
and
sensitivity
to
UV
light,
especially
in
the
UVA
spectrum.
However,
a
reasonable
compromise
between
performance
(such
as
sensitivity,
detectivity,
response
time)
fabrication
ease
remains
an
obstacle
practicability
AZO-based
photodetectors.
To
address
this
issue,
we
propose
efficient
strategy
achieve
large
AZO
photoactive
area
outstanding
performance,
along
with
facile
sol–gel
method.
Consequently,
device
exhibits
superb
on/off
ratio
>104,
detectivity
1.85
×
1012
Jones,
fast
speed
under
365
nm
illumination
without
external
energy
consumption.
Hence,
study
suggests
self-powered
high-performance
nanoporous
detector
environmentally
friendly
scalable
process
that
satisfies
industrial
production
requirements
numerous
practical
UV-detection
applications.
ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
6(21), P. 20389 - 20397
Published: Oct. 30, 2023
Halide
perovskites
stand
out
as
promising
materials
for
the
realization
of
high-performance
photodetectors.
However,
inherent
instability
and
lead
toxicity
are
still
obstacles
facing
wide
practical
application
In
this
work,
first
highly
responsive
lead-free
perovskite
photodiode
based
on
Cs2Ag0.35Na0.65InCl6
nanocrystals
(NCs)
is
demonstrated.
The
composition
tuning
strategy
introduced
to
enhance
device
performance
photodiodes.
Employed
with
a
structure
composed
ZnO:Al
electron-transport
layer
poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(4,4′-(N-(4-s-butylphenyl)diphenylamine)]
hole
transport
layer,
NC
photodiodes
exhibit
high
responsivity
3.03
A/W
specific
detectivity
1.29
×
1011
Jones
under
illumination
340
nm
light
source.
Moreover,
ultraviolet
(UV)
show
good
self-powered
mode,
which
exhibits
0.07
5.04
1010
Jones.
Our
work
verifies
great
potential
NCs
in
environmentally
friendly
UV
