Advanced Functional Materials,
Год журнала:
2024,
Номер
34(37)
Опубликована: Май 14, 2024
Abstract
The
emerging
2D
layered
perovskites
have
promising
optoelectronic
properties,
good
intrinsic
stability
and
reduced
ion
migration,
making
them
effective
for
detecting
X‐ray
radiation.
However,
their
application
is
constrained
by
poor
out‐of‐plane
carrier
transport.
In
this
study,
inch‐sized
high‐quality
CsPb
2
Br
5
single
crystals
(SCs)
are
developed
using
an
organic
ligand‐assisted
solution
process.
By
modifying
the
surface
energy,
anisotropy
of
crystal
growth
conquered,
resulting
in
SCs
with
sufficient
thickness
detection.
Importantly,
modification
significantly
enhanced
quality
as
grown
exhibited
longer
photoluminescence
lifetime
smaller
trap
density.
Notably,
demonstrate
unprecedented
transport,
achieving
a
high
mobility‐lifetime
product
2.53
×
10
−2
cm
V
−1
.
This
can
be
attributed
to
small
interlayer
distance
strong
force
Cs─Br
bonding.
Furthermore,
possess
other
intriguing
attributes
detection,
including
bulk
resistivity
outstanding
thermal
stability.
These
advantageous
properties
enable
high‐performance
vertical‐structure
detection
superior
sensitivity
up
8865.6
µC
Gy
air
low
detectable
dose
rate
12.7
nGy
s
Additionally,
exhibit
spatial
resolution
imaging
exceptional
stability,
candidates
nondestructive
determination.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 17, 2024
Abstract
Metal
halide
perovskites
(MHPs)
are
considered
ideal
photovoltaic
materials
due
to
their
variable
crystal
material
composition
and
excellent
photoelectric
properties.
However,
this
variability
in
leads
complex
crystallization
processes
the
manufacturing
of
perovskite
(MHP)
thin
films,
resulting
reduced
crystallinity
subsequent
performance
loss
final
device.
Thus,
understanding
controlling
dynamics
essential
for
improving
stability
PSCs
(Perovskite
Solar
Cells).
To
investigate
impact
characteristics
on
properties
MHP
films
identify
corresponding
modulation
strategies,
we
primarily
discuss
relevant
aspects
kinetics,
systematically
summarize
theoretical
methods,
outline
techniques
crystallization,
including
solution
engineering,
additive
component
which
helps
highlight
prospects
current
challenges
kinetics
Nano-Micro Letters,
Год журнала:
2024,
Номер
16(1)
Опубликована: Апрель 26, 2024
Metal-halide
perovskites
are
revolutionizing
the
world
of
X-ray
detectors,
due
to
development
sensitive,
fast,
and
cost-effective
devices.
Self-powered
operation,
ensuring
portability
low
power
consumption,
has
also
been
recently
demonstrated
in
both
bulk
materials
thin
films.
However,
signal
stability
repeatability
under
continuous
exposure
only
tested
up
a
few
hours,
often
reporting
degradation
detection
performance.
Here
it
is
shown
that
self-powered
direct
fabricated
starting
from
FAPbBr
Advanced Materials,
Год журнала:
2024,
Номер
36(31)
Опубликована: Май 3, 2024
Functional
agents
are
verified
to
efficiently
enhance
device
performance
of
perovskite
solar
cells
(PSCs)
through
surface
engineering.
However,
the
influence
intrinsic
characteristics
molecules
on
final
is
overlooked.
Here,
a
reconstruction
strategy
developed
efficiency
inverted
PSCs
by
mitigating
adverse
effects
lead
chelation
(LC)
molecules.
Bathocuproine
(BCP)
chosen
as
representative
LC
for
its
easy
accessibility
and
outstanding
optoelectronic
properties.
During
this
strategy,
BCP
first
dissolved
in
solvents
then
captured
specially
undercoordinated
Pb
Abstract
The
exceptional
optoelectronic
properties
of
lead
halide
perovskite
nanocrystals
(PeNCs)
in
the
ultraviolet
and
visible
spectral
regions
have
positioned
them
as
a
promising
class
semiconductor
materials
for
diverse
photovoltaic
applications.
However,
their
limited
response
to
near‐infrared
(NIR)
light
due
intrinsic
bandgap
(>1.5
eV)
has
hindered
applications
many
advanced
technologies.
To
circumvent
this
limitation,
it
is
fundamental
significance
integrate
PeNCs
with
lanthanide‐doped
upconversion
nanoparticles
(UCNPs)
that
are
capable
efficiently
converting
low‐energy
NIR
photons
into
high‐energy
photons.
By
leveraging
energy
transfer
from
UCNPs
PeNCs,
synergistic
combination
can
not
only
expand
responsivity
range
but
also
introduce
novel
emission
profiles
luminescence
multi‐dimensional
tunability
(e.g.,
wavelength,
lifetime,
polarization)
under
low‐to‐medium
power
irradiation,
which
breaks
through
inherent
restrictions
individual
thereby
opens
up
new
opportunities
device
engineering.
In
review,
we
focus
on
latest
advancements
development
PeNCs‐UCNPs
nanocomposites,
an
emphasis
controlled
synthesis
optical
design
such
full‐spectrum
solar
cells,
photodetectors,
multilevel
anticounterfeiting.
Some
future
efforts
prospects
toward
active
research
field
envisioned.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(5), С. 6189 - 6197
Опубликована: Янв. 24, 2024
Formamidinium
lead
triiodide
(FAPbI3)
perovskite
quantum
dot
has
outstanding
durability,
reasonable
carrier
lifetime,
and
long
diffusion
length
for
a
new
generation
of
highly
efficient
solar
cells.
However,
ligand
engineering
is
dilemma
because
the
ionized
dynamic
characteristics
dots.
To
circumvent
this
issue,
herein,
we
employed
mild
solution-phase
ligand-exchange
approach
through
adding
short-chain
amino
acids
that
contain
carboxyl
groups
to
modify
dots
passivate
their
surface
defects
during
purification
process.
As
result,
photoelectric
conversion
efficiency
FAPbI3
cells
(PQDSCs)
increased
from
11.23
12.97%
with
an
open-circuit
voltage
1.09
V,
short-circuit
current
density
16.37
mA
cm–2,
filling
factor
72.13%.
Furthermore,
stability
device
modified
by
retains
over
80%
initial
upon
being
exposed
20–30%
relative
humidity
240
h
aging
treatment.
This
work
may
offer
innovative
concept
treatment
improve
photovoltaic
performance
PQDSCs
toward
large-scale
manufacture.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Март 29, 2024
Abstract
Vacuum‐evaporated
metal
halides
(MHs)
scintillator
thick
films
have
received
much
attention
in
the
X‐ray
imaging
field
due
to
their
excellent
light
yield
and
uniform
large‐area
preparation.
However,
inevitable
heteromorphic
homologs
MHs
(e.g.,
Copper‐based
(Cu‐MHs):
CsCu
2
X
3
∖Cs
Cu
5
)
change
of
film
structural
backbone
will
result
spectral
hybridization
(phase
purity),
eventually
detaches
(lattice
mismatches).
Herein,
a
single‐source
vacuum
evaporation
method
prepare
(≈10
µm)
Cu‐MHs
(as
an
example)
scintillators
is
realized:
1)
Presynthesis
pure
phase
materials
by
solution
with
protective
agent
ensure
purity
without
precise
control
component
ratios
process;
2)
One‐shot
formation
avoids
stress
accumulation
utilize
longitudinal
growth
characteristics
crystalline
obtain
crystal
orientations
better
optical
outputs.
Finally,
obtained
comparable
partially
single‐crystal
(53
983
photons
MeV
−1
resolution
(14.1
lp
mm
partial
template
method.
The
detection
system
based
on
prepared
exhibits
good
response
speed
linearity
different
radiation
intensities
exposure
times.
further
drive
application
believed.
Nano-Micro Letters,
Год журнала:
2025,
Номер
17(1)
Опубликована: Фев. 6, 2025
Abstract
Two-dimensional
Dion-Jacobson
(DJ)
perovskite
has
garnered
significant
attention
due
to
its
superior
responsivity
and
operation
stability.
However,
efforts
are
predominantly
focused
on
discovering
new
organic
spacer
synthesize
novel
perovskites,
while
material-form-associated
light
management,
which
is
crucial
for
enhancing
the
photodetector’s
efficiency,
largely
overlooked.
Herein,
we
introduced
surface
management
strategy
into
DJ-type
system
by
synthesizing
surface-patterned
BDAPbBr
4
(BPB,
BDA
=
NH
3
(CH
2
)
microplates
(MPs)
using
template-assisted
space-confined
method,
was
further
elucidated
theoretical
optical
simulation.
By
leveraging
MPs
enhance
absorption,
BPB-based
photodetectors
(PDs)
achieved
remarkable
photoresponse
in
ultraviolet
region,
marked
a
high
on/off
ratio
(~
5000),
(2.24
A
W
−1
),
along
with
large
detectivity
10
13
Jones)
low
detection
limit
(68.7
nW
cm
−2
).
Additionally,
PDs
showcased
communication
imaging
capabilities
even
under
weak-light
illumination.
Notably,
anisotropic
nature
of
conferred
excellent
polarization
sensitivity
PD.
These
results
represented
first
demonstration
BPB
imaging,
as
well
polarized
detection.
Our
findings
offer
valuable
insights
photodetector
performance
optoelectronic
applications
through
strategies.
