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.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(11), P. 7658 - 7667
Published: March 7, 2024
High-power
phosphor-converted
white
light-emitting
diodes
(hp-WLEDs)
have
been
widely
involved
in
modern
society
as
outdoor
lighting
sources.
In
these
devices,
due
to
the
Joule
effect,
high
applied
currents
cause
operation
temperatures
(>500
K).
Under
conditions,
most
phosphors
lose
their
emission,
an
effect
known
thermal
quenching
(TQ).
Here,
we
introduce
a
zero-dimensional
(0D)
metal
halide,
Rb3InCl6:xSb3+,
suitable
anti-TQ
phosphor
offering
robust
behavior
up
500
K.
We
ascribe
this
of
halide
two
factors:
(1)
compensation
process
via
thermally
activated
energy
transfer
from
structural
defects
emissive
centers
and
(2)
intrinsic
rigidity
isolated
octahedra
0D
structure.
The
phosphor-based
WLEDs
can
stably
work
at
current
2000
mA.
low
synthesis
cost
nontoxic
composition
reported
here
herald
new
generation
for
hp-WLED.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 5, 2024
Organic-inorganic
hybrid
manganese(II)
halides
(OIMnHs)
have
garnered
tremendous
interest
across
a
wide
array
of
research
fields
owing
to
their
outstanding
optical
properties,
abundant
structural
diversity,
low-cost
solution
processibility,
and
low
toxicity,
which
make
them
extremely
suitable
for
use
as
new
class
luminescent
materials
various
optoelectronic
applications.
Over
the
past
years,
plethora
OIMnHs
with
different
dimensionalities
multifunctionalities
such
efficient
photoluminescence
(PL),
radioluminescence,
circularly
polarized
luminescence,
mechanoluminescence
been
newly
created
by
judicious
screening
organic
cations
inorganic
Mn(II)
polyhedra.
Specifically,
through
precise
molecular
engineering,
series
near-unity
PL
quantum
yields,
high
anti-thermal
quenching
excellent
stability
in
harsh
conditions
devised
explored
applications
light-emitting
diodes
(LEDs),
X-ray
scintillators,
multimodal
anti-counterfeiting,
fluorescent
sensing.
In
this
review,
latest
advancements
development
are
summarized,
covers
from
fundamental
physicochemical
properties
advanced
applications,
an
emphasis
on
functionality
design
especially
LEDs
detection
imaging.
Current
challenges
future
efforts
unlock
potentials
these
promising
also
envisioned.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(45)
Published: Sept. 25, 2023
Abstract
Eco‐friendly
lead‐free
organic–inorganic
manganese
halides
(OIMHs)
have
attracted
considerable
attention
in
various
optoelectronic
applications
because
of
their
superior
optical
properties
and
flexible
solution
processibility.
Herein,
we
report
a
novel
pseudo‐2D
layered
OIMH
(MTP)
2
MnBr
4
(MTP:
methyltriphenylphosphonium),
which
exhibits
intense
green
emission
under
UV/blue
or
X‐ray
excitation,
with
near‐unity
photoluminescence
quantum
yield,
high
resistance
to
thermal
quenching
(I
150
°C
=84.1
%)
good
photochemical
stability.
These
features
enable
as
an
efficient
phosphor
for
blue‐converted
white
light‐emitting
diodes,
demonstrating
commercial‐level
luminous
efficiency
101
lm
W
−1
wide
color
gamut
116
%
NTSC.
Moreover,
these
crystals
showcase
outstanding
scintillation
properties,
delivering
light
yield
67000
photon
MeV
,
detection
limit
82.4
nGy
s
competitive
spatial
resolution
6.2
lp
mm
imaging.
This
work
presents
new
avenue
the
exploration
eco‐friendly
luminescent
OIMHs
towards
multifunctional
applications.
Angewandte Chemie,
Journal Year:
2023,
Volume and Issue:
135(45)
Published: Sept. 25, 2023
Abstract
Eco‐friendly
lead‐free
organic–inorganic
manganese
halides
(OIMHs)
have
attracted
considerable
attention
in
various
optoelectronic
applications
because
of
their
superior
optical
properties
and
flexible
solution
processibility.
Herein,
we
report
a
novel
pseudo‐2D
layered
OIMH
(MTP)
2
MnBr
4
(MTP:
methyltriphenylphosphonium),
which
exhibits
intense
green
emission
under
UV/blue
or
X‐ray
excitation,
with
near‐unity
photoluminescence
quantum
yield,
high
resistance
to
thermal
quenching
(I
150
°C
=84.1
%)
good
photochemical
stability.
These
features
enable
as
an
efficient
phosphor
for
blue‐converted
white
light‐emitting
diodes,
demonstrating
commercial‐level
luminous
efficiency
101
lm
W
−1
wide
color
gamut
116
%
NTSC.
Moreover,
these
crystals
showcase
outstanding
scintillation
properties,
delivering
light
yield
67000
photon
MeV
,
detection
limit
82.4
nGy
s
competitive
spatial
resolution
6.2
lp
mm
imaging.
This
work
presents
new
avenue
the
exploration
eco‐friendly
luminescent
OIMHs
towards
multifunctional
applications.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
12(14)
Published: Jan. 15, 2024
Abstract
It
is
imminent
to
develop
phosphors
with
multiple
stimuli
responses
due
the
increasing
demand
on
anti‐counterfeiting
and
information
encryption
technologies.
Here,
a
zero
dimensional
(0D)
organic–inorganic
hybrid
(DPPE)
2
MnBr
4
·H
O
(DPPE
=
4,4‐Difluoropiperidine,
1
),
which
emits
green
light
exhibits
reversible
thermo‐
vapor‐luminescence
heat
organic
solvents
reported.
Specifically,
when
heated
above
100
°C
for
30
s,
transforms
into
yellow‐emitting
.
Upon
exposure
dichloromethane
(DCM),
it
red‐emitting
3
Experimental
analysis
reveals
that
Mn
2+
‐Mn
magnetic
coupling
interactions
coordination
configuration
transformation
are
responsible
obvious
switching
of
photoluminescence.
Owing
its
extraordinary
triple‐mode
characteristics,
enabling
luminescence‐adjustable
transformations
such
as
yellow,
red,
yellow
red
emission,
this
metal‐halide
promising
application
in
encryption.
Chemical Engineering Journal,
Journal Year:
2024,
Volume and Issue:
485, P. 149741 - 149741
Published: Feb. 16, 2024
Metal
halide
perovskites
showing
responses
to
external
stimuli
have
emerged
as
a
new
class
of
stimulus-responsive
smart
materials.
Specifically,
their
photoluminescence
(PL)
intensity,
color
and
lifetime
can
change
with
different
stimuli.
However,
most
the
existing
metal
only
show
PL
response
single
stimulus.
For
encryption
security
applications,
it
is
desired
selective
multiple
Herein,
we
developed
type
cesium
(Cs)
manganese
(Mn)
bromide
(Br)
perovskite
(Cs2MnBr4(H2O)2)
crystal
temperature,
humidity
solvent
by
taking
advantage
its
structural
phase
transition,
which
causes
intensity
(from
non-luminescent
near
unity
luminescence)
green
red).
Stimuli-responsive
be
achieved
engineering
structure
Cs-Mn-Br
from
Cs2MnBr4(H2O)2
Cs2MnBr4,
Cs3MnBr5,
CsMnBr3(H2O)2
CsMnBr3
via
temperature
solvents.
Such
responsive
material
promising
for
multidimensional
information
encryption.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(5), P. 4456 - 4466
Published: Jan. 26, 2024
Metal
halide
perovskites
offer
ample
opportunities
to
develop
advanced
optoelectronic
devices.
This
work
showcases
that
the
integration
of
metal
into
oxide
nanoshells
with
controllable
interior
cavities
can
enable
water-vapor-responsive
dual-mode
switching
fluorescence
and
structural
color.
Through
a
ship-in-a-bottle
method
introduce
controlled
amount
CsPbBr3
MnO2
nanoshells,
we
have
designed
CsPbBr3@MnO2
yolk–shell
nanostructures,
which
uptake
defined
water
exhibit
rapid
(less
than
1
s)
reversible
(≥100
cycles)
responses
in
both
on–off
color
change
when
exposed
dynamic
vapor.
These
originate
from
water-triggered
phase
transformation
CsPb2Br5
shell.
The
altered
electronic
bonding
structure
at
oxide–halide
interface,
accumulation
cavity,
protective
effect
shell
facilitate
transformations.
response
characteristics
nanostructures
been
further
demonstrated
fabricating
patterned
films
capable
multiple
fluorescence/structural
responses,
highlighting
their
potential
for
applications
anticounterfeiting
encryption.
Advanced Optical Materials,
Journal Year:
2023,
Volume and Issue:
12(5)
Published: Sept. 13, 2023
Abstract
The
development
of
highly
stable
and
ultra‐long
organic
room
temperature
phosphorescence
(RTP)
materials
holds
great
promise
for
applications
in
anti‐counterfeiting
information
protection.
To
improve
the
encryption
level,
exploration
with
tunable
afterglow
features
is
urgent
need.
Hereby,
a
series
long‐lived
systems
RTP
developed
by
incorporating
benzocarbazole
derivatives
into
polyvinyl
alcohol
(PVA)
matrix
(BCz@PVA).
Notably,
BCz@PVA
film
exhibits
outstanding
behavior
an
ultralong
lifetime
(τ
p
)
2.09
s,
high
quantum
yield
(Φ
46.335%,
duration
15
s.
Moreover,
maintains
excellent
performance
even
after
being
placed
ambient
conditions
60
days.
Theoretical
calculations
reveal
that
attributed
to
stronger
intermolecular
interactions,
smaller
energy
gap
(ΔE
st
between
singlet
triplet
states,
molecular
stacking
mode.
Furthermore,
color‐tunable
photoluminescence
(PL),
distinct
τ
,
are
successfully
achieved
adjusting
position
Br
substituent
on
benzene
ring.
Based
their
diverse
performances
stability,
corresponding
provides
successful
application
multi‐level
high‐security
