Small,
Journal Year:
2023,
Volume and Issue:
20(4)
Published: Sept. 15, 2023
Abstract
Recently,
metal
1halide
perovskites
have
shown
compelling
optoelectronic
properties
for
both
light‐emitting
devices
and
scintillation
of
ionizing
radiation.
However,
conventional
lead‐based
halide
are
still
suffering
from
poor
material
stability
relatively
low
X‐ray
light
yield.
This
work
reports
cadmium‐based
all‐inorganic
halides
systematically
investigates
the
influence
ion
incorporation
on
properties.
introduces
bi‐metal
strategy
successfully
enhances
photoluminescence
quantum
yield
(98.9%),
improves
thermal
stability,
extends
spectra,
which
show
great
potential
white
emission.
In
addition,
photoluminescent
decay
is
also
modulated
with
single
incorporation,
charge
carrier
lifetime
reduced
to
less
than
1
µs,
high
luminescent
efficiency
(41
000
photons
MeV
−1
)
maintained.
Then,
these
fast
scintillators
demonstrated
high‐speed
communication
sensitive
detection
imaging.
Advanced Optical Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 19, 2025
Abstract
The
intrinsic
instability
of
metal
halide
perovskites
(MHPs)
renders
them
highly
susceptible
to
environmental
factors,
thereby
posing
significant
challenges
for
their
broad
application.
However,
this
sensitivity
also
imparts
unique
properties
that
are
particularly
advantageous
anti‐counterfeiting
applications.
Herein,
blue
and
green
dual‐mode
luminescent
CsPbBr₃
nanocrystals
devised
by
employing
a
confined
growth
strategy.
By
in
situ
within
molecular
sieves
(MS),
composite
CsPbBr₃@MS@CsPbBr₃/Cs₄PbBr₆
synthesized
with
strongly‐confined
core
shell
structure.
Leveraging
the
phonon
disturbance
effect,
these
exhibit
reversible
thermotropic
emission
color
transition
between
over
wide
temperature
range
−196–100
°C.
This
is
attributed
variation
energy
transfer
(ET)
efficiency
nanocrystals.
Notably,
thermal
fluorescence
intensity
ratio
(FIR)
at
I₅₂₅nm/I₄₆₀nm
reaches
0.19
K⁻¹
100
°C,
which
significantly
higher
than
traditional
rare‐earth
fluorescent
thermosensitive
materials.
remarkable
highlights
high
responsiveness
changes.
Nanocrystal
labels
further
fabricated
display
temperature‐driven
spectral
transitions,
enabling
dynamic
functionality.
innovative
approach
offers
novel
concept
design
materials
devices.
Abstract
Thermochromic
materials,
known
for
their
unique
ability
to
change
optical
properties
with
temperature,
have
broad
applications,
including
in
thermochromic
light‐emitting
diodes
(LEDs).
However,
the
scarcity
of
efficient
and
stable
phosphors
limits
development.
In
this
study,
development
a
novel
phosphor
based
on
zero‐dimensional
(0D)
inorganic
metal
halides
is
reported.
The
0D
Cs
2
ZnBr
4
:Ag
+
show
thermally
enhanced
self‐trapped
exciton
(STE)
emission
across
wide
temperature
range
from
120
300
K
emitted
wavelength
changing
correspondingly.
Temperature‐dependent
photoluminescence
(PL),
time‐resolved
PL,
density
functional
theory
calculations
confirm
that
STE
originates
passivated
defect/traps
assisted
energy
transfer
host
STEs
formed
by
[AgBr
]
3–
tetrahedron
matrix
phonons
complementing
mismatch.
Furthermore,
reversible
LEDs
are
successfully
prepared.
Overall,
these
findings
provide
future
design
high‐efficiency
luminescent
materials
pave
new
way
developing
LED
illumination.
Inorganic Chemistry Frontiers,
Journal Year:
2024,
Volume and Issue:
11(19), P. 6418 - 6424
Published: Jan. 1, 2024
Starting
from
the
pivotal
structure–performance
relationship,
three
compounds
are
synthesized
through
halogen
regulation,
and
photoluminescence
is
dependent
on
structure.
Small,
Journal Year:
2023,
Volume and Issue:
20(4)
Published: Sept. 15, 2023
Abstract
Recently,
metal
1halide
perovskites
have
shown
compelling
optoelectronic
properties
for
both
light‐emitting
devices
and
scintillation
of
ionizing
radiation.
However,
conventional
lead‐based
halide
are
still
suffering
from
poor
material
stability
relatively
low
X‐ray
light
yield.
This
work
reports
cadmium‐based
all‐inorganic
halides
systematically
investigates
the
influence
ion
incorporation
on
properties.
introduces
bi‐metal
strategy
successfully
enhances
photoluminescence
quantum
yield
(98.9%),
improves
thermal
stability,
extends
spectra,
which
show
great
potential
white
emission.
In
addition,
photoluminescent
decay
is
also
modulated
with
single
incorporation,
charge
carrier
lifetime
reduced
to
less
than
1
µs,
high
luminescent
efficiency
(41
000
photons
MeV
−1
)
maintained.
Then,
these
fast
scintillators
demonstrated
high‐speed
communication
sensitive
detection
imaging.
