Chemistry of Inorganic Materials,
Journal Year:
2023,
Volume and Issue:
1, P. 100023 - 100023
Published: Nov. 13, 2023
Photodetector
is
an
essential
component
in
many
optoelectronic
devices
nowadays
that
converts
the
incoming
optical
signal
into
electrical
signal.
The
need
for
multi-spectral
photoelectric
detection
same
scene
promotes
application
of
wide
spectrum
detection.
Halide
hybrid
perovskites
can
be
excellent
candidates
wide-spectrum
photodetectors
which
cover
a
spectral
range
UV–visible–infrared.
However,
intrinsic
defects
perovskite
material
and
among
various
functional
layers
might
increase
dark
current
seriously
reduce
photodetector
device
performance.
Therefore,
reducing
improving
spectra-detection
performance
ultra-wideband
radiation
are
main
targets
investigation
high-efficient
photodetectors.
In
this
mini-review,
parameters
determine
their
effects
on
discussed
first
time.
Then
work
evaluated
promising
approaches
to
solve
defect-dependent
recombination
We
further
outlooked
effective
application.
Science Advances,
Journal Year:
2024,
Volume and Issue:
10(18)
Published: May 3, 2024
Perovskite
light-emitting
diodes
(PeLEDs)
have
attracted
great
attention
in
recent
years;
however,
the
halogen
vacancy
defects
perovskite
notably
hamper
development
of
high-efficiency
devices.
Previously,
large-sized
passivation
agents
been
usually
used,
while
effect
defect
is
limited
due
to
weak
bonding
or
large
space
steric
hindrance.
Here,
we
predict
that
ultrasmall-sized
formate
(Fa)
and
acetate
(Ac)
more
efficient
ability
because
stronger
binding
with
perovskite,
as
demonstrated
by
density
functional
theory
calculation.
We
introduce
cesium
salts
(CsFa/CsAc)
into
buried
interface,
which
can
also
diffuse
bulk,
resulting
both
interface
bulk
passivation.
In
addition,
improved
growth
has
found
enhanced
hydrophily
after
introducing
CsFa/CsAc
additive.
According
these
advantages,
a
pure-red
PeLED
24.2%
efficiency
at
639
nm
achieved.
Science Advances,
Journal Year:
2025,
Volume and Issue:
11(3)
Published: Jan. 15, 2025
The
utilization
of
low-dimensional
perovskites
(LDPs)
as
interlayers
on
three-dimensional
(3D)
has
been
regarded
an
efficient
strategy
to
enhance
the
performance
perovskite
solar
cells.
Yet,
formation
mechanism
LDPs
and
their
impacts
device
remain
elusive.
Herein,
we
use
dimensional
engineering
facilitate
controllable
growth
1D
2D
structures
3D
perovskites.
differences
isomeric
ligands
in
electrostatic
potential
distribution
steric
effects
for
intermolecular
forces
contribute
different
LDPs.
structure
facilitates
charge
transfer
with
favored
channel
orientation
energy
level
alignment.
This
approach
enables
modules
(PSMs)
using
2,2′,7,7′-tetrakis[
N
,
-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene
achieve
efficiency
20.20%
over
10
by
square
centimeters
(cm
2
)
22.05%
6
cm
.
In
particular,
a
PSM
(6
poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine]
maintains
initial
~95%
after
1000
hours
under
rigorous
ISOS-L-3
accelerated
aging
tests,
marking
record
highest
stability
n-i-p
modules.
The Journal of Physical Chemistry Letters,
Journal Year:
2024,
Volume and Issue:
15(9), P. 2453 - 2461
Published: Feb. 26, 2024
The
organic–inorganic
halide
perovskite
has
become
one
of
the
most
promising
candidates
for
next-generation
memory
devices,
i.e.
memristors,
with
excellent
performance
and
solution-processable
preparation.
Yet,
mechanism
resistive
switching
in
perovskite-based
memristors
remains
ambiguous
due
to
a
lack
situ
visualized
characterization
methods.
Here,
we
directly
observe
process
photoluminescence
(PL)
imaging
microscopy
under
an
external
electric
field.
Furthermore,
corresponding
element
composition
conductive
filaments
(CFs)
is
studied,
indicating
that
metallic
CFs
respect
activity
top
electrode
are
essential
device
performance.
Finally,
electrochemical
impedance
spectroscopy
(EIS)
conducted
reveal
transition
ion
states
associated
formation
CFs.
This
study
provides
in-depth
insights
into
paving
pathway
develop
optimize
high-performance
large-scale
applications.
ACS Photonics,
Journal Year:
2024,
Volume and Issue:
11(8), P. 3026 - 3036
Published: June 24, 2024
The
state-of-the-art
visible-blind
ultraviolet
(UV)
photodetectors
(PDs)
are
generally
demonstrated
to
have
typical
photoconductor
or
photodiode
structures,
without
the
tunability
balance
different
photosensing
parameters.
Here,
we
propose
a
specially
designed
perovskite/GaN-based
light-modulated
bipolar
junction
transistor
(BJT)
for
UV
photodetection.
As
conduction-band-aligned
p-n-p
at
CH3NH3PbCl3/GaN
interface
dominates
photocarrier
dynamics,
saturated
photocurrent
collected
with
electrodes
on
perovskite
film
is
linearly
dependent
optical
power
pumped
GaN
multiplication.
This
device
reaches
output
0.5
V,
reporting
responsivity
of
0.43
A/W,
specific
detectivity
4.11
×
1012
Jones,
rise/fall
time
70.50/71.83
μs,
and
highest
linear
dynamic
range
159
dB.
Our
provides
structure
panel
optimize
trade-off
between
response
speed,
comprehensive
performance
outperforming
published
similar
PDs
commercial
products.
Moreover,
it
can
be
readily
integrated
GaN-based
lighting
devices
full-duplex
communication
in
light-fidelity
(LiFi)
networks.
Small,
Journal Year:
2024,
Volume and Issue:
20(26)
Published: Jan. 18, 2024
Abstract
Inverted
flexible
perovskite
cells
(fPSCs)
have
attracted
much
attention
for
their
high
efficiency
and
power
per
weight.
Still,
the
steady–state
output
is
one
of
critical
factors
commercialization.
In
this
paper,
it
found
that
current
inverted
fPSCs
based
on
nickel
oxide
nanoparticles
(n‐NiO
x
)
continuously
decreases
under
light
illumination.
Conversely,
those
magnetron‐sputtered
NiO
(sp‐NiO
exhibit
opposite
result.
Based
visualization
ion
migration
in
photoluminescence
(PL)
imaging
microscopy
tests,
discrepancies
buried
surfaces
lead
to
differences
films,
which
triggers
temporary
instability
devices
during
operation.
The
DFT
theoretical
calculation
experimental
results
reveal
films
with
different
contents
Ni
vacancies
can
modulate
crystallization
surfaces.
Tuning
essential
stabilize
at
a
steady
state.
To
demonstrate
that,
capsaicin
doped
into
solutions
improve
quality
interface.
Finally,
corresponding
outstanding
stability
These
provide
valuable
scientific
guidance
fabricating
stable
operation
illumination
conditions.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 5, 2024
Abstract
2D
Ruddlesden─Popper
(RP)
halide
perovskites
are
attracting
increasing
research
interest
due
to
their
enhanced
stability
compared
3D
perovskites.
However,
the
quantum
confinement
effect
of
bulk
organic
spacers
hinders
separation
and
transport
photo‐generated
carriers.
Here,
a
multiple
aromatic
ring
spacer,
3‐benzothiophene
methylammonium
(BTMA),
is
developed
for
new
RP
perovskite.
The
BTMA
spacer
demonstrated,
with
significant
dipole
moment,
can
impair
influence
effect,
presence
S
atoms
or
thiophene
favorable
enhancing
interaction
between
inorganic
sheets,
improving
perovskite
photodetector
as
displays
higher
device
performance
than
control
sample
1‐naphthalene
(NMA)
spacers.
Importantly,
outstanding
BTMA‐based
films
devices
also
confirmed
under
moisture,
heat,
illumination
conditions.
Combining
asymmetric
coplanar
nanogap
electrode
architecture,
photodetectors'
responsivity,
detectivity,
external
efficiency
314
A
W
−1
,
3.4
×
10
13
Jones,
865%,
respectively,
demonstrated.
photodetectors
display
promising
self‐power
characteristics,
which
makes
them
attractive
numerous
energy‐efficient
applications.
work
highlights
route
toward
developing
high‐performance
perovskite‐based
excellent
long‐term
stability.
