Angewandte Chemie,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 29, 2024
Abstract
Near‐infrared
(NIR)
image
sensors
based
on
solution‐processed
thin
film
are
gaining
prominence
in
various
applications,
including
security
detection,
remote
sensing,
medical
imaging,
and
environmental
monitoring,
owing
to
superior
penetration
capabilities
of
NIR
light.
However,
the
reported
perovskite
suffer
from
limited
resolution
performance
due
poor
structural
integrity,
bioincompatibility,
constrained
response
wavelength
range
lead‐based
materials
employed.
In
this
study,
we
present
non‐toxic
quasi‐single‐crystal
(QSC)
CH(NH
2
)
SnI
3
(FASnI
films,
prepared
via
a
simple
spin‐coating
technique,
that
demonstrate
high
integrity
effective
response.
Through
series
situ
characterizations,
reveal
orderly
growth
mode
QSC‐FASnI
films
enables
more
oriented
crystal
with
reduced
trap
grain
boundaries.
Consequently,
self‐powered
photodetector
exhibited
large
detectivity
over
10
13
Jones
(780–890
nm).
Ultimately,
high‐resolution
64×64
(4096)
pixels
imaging
array,
exhibiting
photo
dark
non‐uniformity
value,
was
fabricated
thin‐film
transistors
(TFT)
backplanes,
enabling
ultraweak
light
(63
nW
cm
−2
real‐time
fingerprint
hidden
object
recognition.
This
work
pioneers
application
lead‐free
for
arrays.
Journal of Materials Chemistry C,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
We
developed
a
self-powered
photodetector
using
SAM
interlayer
for
defect
passivation
and
electron
blocking.
The
device
shows
low
dark
current,
an
on/off
ratio
of
7.6
×
10⁶,
detectivity
2.74
10¹²
Jones
under
365
nm
light.
Laser & Photonics Review,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 26, 2024
Abstract
Self‐powered
photodetectors
(PDs)
have
gained
significant
attention
in
recent
years
due
to
their
ability
operate
without
external
power.
Strengthening
the
built‐in
electric
field
(
E
bi
)
of
these
devices
is
crucial
for
efficient
carrier
separation
and
transport.
However,
disordered
energy
level
arrangement
within
mixed
halide
perovskites
(MHP)
often
conflicts
with
levels
constructed
by
interface,
weakening
thus
affecting
performance
self‐powered
PDs.
In
this
study,
a
bias‐induced
gradient
bandgap
bulk
MHP
proposed
high‐performance
photodetectors.
The
vector
superposition
interface
significantly
boosts
device,
providing
powerful
driving
force
transport
photogenerated
carriers.
obtained
device
exhibits
exceptional
performance,
including
an
ultra‐fast
response
time
1.14/1.75
µs,
large
specific
detectivity
7.27
×
10
12
cm
Hz
1/2
W
−1
,
ultra‐high
responsivity
0.49
A
quantum
efficiency
93.5%
at
0
V
bias.
Furthermore,
strategy
also
demonstrated
lateral
structure
photodetector.
This
work
offers
valuable
guidance
achieving
MHP‐based
PDs
through
optimization.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 8, 2024
Abstract
As
the
focus
on
information
security
continues
to
intensify,
encrypted
imaging
sensing
technology
becomes
increasingly
indispensable.
However,
widespread
application
of
is
hindered
by
high
manufacturing
costs
and
complex
system
construction.
Herein,
an
all‐inorganic
perovskite/perovskite
tandem
self‐powered
photodetector
(PDs)
reported,
incorporated
with
Bi
2
TeO
6
layer
enahnce
dual
pyro‐phototronic
effect,
realize
innovated
encryption
programmable
logic
gate.
The
PDs
reach
responsivity
1.46
A
W
−1
detectivity
3.44
×
10
13
Jones,
corresponding
EQE
reaches
342%,
which
≈75.48
times
greater
than
that
without
effect.
outstanding
performance
resulting
from
effect
in
Cs
PbI
Cl
perovskite
/CsSn
0.5
Pb
IBr
interface,
optimizing
band
arrangement
oxidized
layer.
photovoltaic
signal
can
still
be
clearly
distinguished
under
8
kHz
pulsed
laser.
More
importantly,
achieves
simultaneous
outputs
triple
image
information,
their
optoelectronic
gate
execute
six
distinct
logical
functions,
including
“OR”,
“AND”,
“XOR”,
“NAND”,
“NOR”
“XNOR”.
This
research
not
only
provides
a
feasible
strategy
for
realizing
materials,
but
also
presents
novel
insights
designing
technology.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 17, 2024
Abstract
Photoconductors
featuring
an
individual
micro/nano‐crystal
as
the
photoactive
channel
hold
great
promise
for
next‐generation
integrated
optoelectronics.
Meanwhile,
gain
aiming
signal
amplification
without
extra
amplifier,
fast
response
data
transfer,
and
low
dark
current
weak
acquisition
are
highly
desirable
in
optoelectronics,
but
inherent
trade‐off
traditional
photoconductors.
Herein,
study
demonstrates
a
single‐microplate
MAPbI
3
photoconductor
based
on
polyvinyl
alcohol‐filled
planar
electrodes
that
can
simultaneously
achieve
excellent
performance
these
parameters.
The
superior
be
attributed
to
exquisite
design
of
filling
device
gap
with
alcohol.
This
deep‐work‐function
transparent
alcohol
not
only
passivate
surface
defects
perovskite
microplate
by
hydrogen
bonding,
also
form
heterojunction
top
perovskites
induce
depleted
channel.
Resultant
photodetectors
exhibit
exceptional
characteristics
including
ultra‐low
noise‐equivalent
power
0.19
fW
Hz
−1/2
,
high
specific
detectivity
3.68
×
10
14
Jones,
3.2
µs,
EQE‐bandwidth
over
7
Hz,
well
stability.
More
importantly,
photoconductors
demonstrate
ultra‐weak‐light
imaging
ability
surpassing
silicon
counterparts.
Furthermore,
successful
integration
their
pixels
showcases
promising
prospect
Applied Physics Letters,
Год журнала:
2024,
Номер
125(14)
Опубликована: Сен. 30, 2024
Time-domain
density
functional
theory,
coupled
with
non-adiabatic
molecular
dynamics
simulations,
was
employed
to
explore
the
defect
characteristics
and
associated
nonradiative
recombination
processes
in
bismuth
halide
perovskite
Cs3Bi2Cl9.
Our
findings
indicate
that
Cs3Bi2Cl9
inherently
exhibits
p-type
semiconductor
behavior,
vacancies
at
Cs
Bi
sites
acting
as
predominant
shallow
acceptor
defects.
Although
Cl
vacancy
interstitial
defects
introduce
trap
states
within
bandgap
of
Cs3Bi2Cl9,
by-defect
electron–hole
(e-h)
is
substantially
impeded,
which
attributed
remarkable
local
structural
deformations
BiCl63−
octahedral
compression
around
defects,
further
results
decoupling
between
state
band
edge
state.
As
a
result,
enhanced
delocalization
leads
notably
small
wave
function
overlap
states,
well
weak
nonadiabatic
couplings
dominated
by
low-frequency
phonons.
study
offers
crucial
insights
into
mechanism
defect-mediated
e-h
bismuth-based
perovskites
provides
guidelines
for
designing
efficient
optoelectronic
devices
based
on
these
materials.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 29, 2024
Abstract
Near‐infrared
(NIR)
image
sensors
based
on
solution‐processed
thin
film
are
gaining
prominence
in
various
applications,
including
security
detection,
remote
sensing,
medical
imaging,
and
environmental
monitoring,
owing
to
superior
penetration
capabilities
of
NIR
light.
However,
the
reported
perovskite
suffer
from
limited
resolution
performance
due
poor
structural
integrity,
bioincompatibility,
constrained
response
wavelength
range
lead‐based
materials
employed.
In
this
study,
we
present
non‐toxic
quasi‐single‐crystal
(QSC)
CH(NH
2
)
SnI
3
(FASnI
films,
prepared
via
a
simple
spin‐coating
technique,
that
demonstrate
high
integrity
effective
response.
Through
series
situ
characterizations,
reveal
orderly
growth
mode
QSC‐FASnI
films
enables
more
oriented
crystal
with
reduced
trap
grain
boundaries.
Consequently,
self‐powered
photodetector
exhibited
large
detectivity
over
10
13
Jones
(780–890
nm).
Ultimately,
high‐resolution
64×64
(4096)
pixels
imaging
array,
exhibiting
photo
dark
non‐uniformity
value,
was
fabricated
thin‐film
transistors
(TFT)
backplanes,
enabling
ultraweak
light
(63
nW
cm
−2
real‐time
fingerprint
hidden
object
recognition.
This
work
pioneers
application
lead‐free
for
arrays.
Chemistry of Materials,
Год журнала:
2024,
Номер
36(22), С. 11015 - 11024
Опубликована: Ноя. 9, 2024
Organic–inorganic
halide
perovskites
(OIHPs)
have
attracted
tremendous
attention
from
researchers
because
of
their
diverse
applications
in
optoelectronics,
sensing,
catalysis,
memory,
photodetectors,
and
medical
diagnostics.
The
presence
inherent
ferroelectricity
these
perovskite
materials
facilitates
the
separation
photogenerated
electron–hole
pairs.
Here,
we
report
a
large
phosphonium
cation-based
methyl
triphenyl
lead
bromide
(MTPLB)
perovskite-like
semiconductor
with
direct
band
gap
3.49
eV,
which
shows
both
nanoscale
bulk
at
room
temperature.
material
exhibits
phase
transition
temperature
477
K,
polarization
saturation
0.26
μC/cm2,
d33
5.2
pC/N.
MTPLB
displays
robust
piezoelectric
response,
as
confirmed
via
advanced
piezoresponse
force
microscopy
(PFM).
Further,
fabricated
nanogenerator
devices
varying
ratios
poly(vinylidene
fluoride)
(PVDF)
composites
for
mechanical
biomechanical
energy
harvesting.
We
an
enhanced
all
best
response
device
2%
loading
PVDF
matrix
due
to
triggering
electroactive
phases
PVDF.
improved
output
operational
durability,
flexibility
composite-based
underscore
potential
technological
electronics,
actuators,
sensors,
energy-harvesting
processes.
Angewandte Chemie,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 7, 2024
Abstract
Electron‐withdrawing
molecules
(EWMs)
have
exhibited
remarkable
efficacy
in
boosting
the
performance
of
perovskite
solar
cells
(PSCs).
However,
underneath
mechanisms
governing
their
positive
attributes
remain
inadequately
understood.
Herein,
we
conducted
a
comprehensive
study
on
EWMs
by
comparing
2,2′‐(2,5‐cyclohexadiene‐1,4‐diylidene)
bismalononitrile
(TCNQ)
and
(2,3,5,6‐tetrafluoro‐2,5‐cyclohexadiene‐1,4‐diylidene)
dimalononitrile
(F4TCNQ)
employed
at
perovskite/hole
transport
layer
(HTL)
interfaces.
Our
findings
reveal
that
simultaneously
enhance
chemical
passivation,
interface
dipole
effect,
chemically
binding
to
HTL.
Notably,
F4TCNQ,
with
its
superior
electron‐withdrawing
properties,
demonstrates
more
pronounced
impact.
Consequently,
PCSs
modified
F4TCNQ
achieved
an
impressive
power
conversion
efficiency
(PCE)
25.21
%,
while
demonstrating
excellent
long‐term
stability.
Moreover,
PCE
larger‐area
module
(14.0
cm
2
)
based
reached
21.41
%.
This
work
illuminates
multifaceted
interfaces
PSCs,
delivering
pivotal
insights
pave
way
for
sophisticated
design
strategic
application
EWMs,
thereby
propelling
advancement
photovoltaic
technology.
