Abstract
Chiral
perovskites
are
considered
as
promising
candidates
for
circularly
polarized
luminescence
(CPL)
light
source,
by
attracting
the
broader
scientific
community
their
applications
in
chiral
optoelectronics
and
spintronics.
However,
it
is
still
a
great
challenge
to
achieve
both
substantial
photoluminescence
asymmetry
(
g
CPL
)
high
quantum
yield
(PLQY)
simultaneously
brightness
due
limitations
associated
with
magnetic
transition
dipole
moments.
Herein,
this
problem
overcome
large
of
1.6×10
−2
PLQY
56%
perovskite
through
element
doping
strategy.
The
substitution
Pb
2+
ion
smaller
Mn
ions
shrinks
crystal
lattice
around
[MnBr
6
]
4−
octahedra,
amplifying
asymmetric
distortion
surrounding
ions.
Moreover,
can
harvest
photoexcitation
energy
perovskites,
its
spin‐flipping
characteristics
enable
highly
efficient
from
d–d
on
levels.
Furthermore,
strategy
proven
be
universal
tactic
enhancing
confirmed
series
1D‐
or
2D‐chiral
various
ligands
halogens.
findings
provide
an
in‐depth
understanding
structure‐property
relationship
toward
optoelectronic
spintronic
applications.
Chemical Communications,
Journal Year:
2024,
Volume and Issue:
60(68), P. 9034 - 9037
Published: Jan. 1, 2024
Copper(
i
)
halides
with
different
polyhedron
units
were
obtained
via
solvent
volatilization,
showing
consecutive
structural
evolution
and
photoluminescence
tuning.
Chemical Communications,
Journal Year:
2024,
Volume and Issue:
60(88), P. 12924 - 12927
Published: Jan. 1, 2024
A
core–shell
model
of
polymetallic
low-dimensional
hybrid
metal
halides
is
proposed.
This
can
explain
the
photoemission
properties
[(C
6
H
18
N
3
)
2
·Pb
Br
10
]
(C
=
2-(piperazin-1-yl)ethan-1-aminium)
coated
with
a
manganese
bromide
layer.
ACS Materials Letters,
Journal Year:
2023,
Volume and Issue:
5(11), P. 2978 - 2986
Published: Oct. 9, 2023
Despite
the
fascinating
optical
and
electronic
properties
of
emerging
Cu(I)
halides,
their
high
melting
points,
irreversible
decomposition,
intrinsic
instability
have
hindered
optoelectronic
applications.
Here,
we
designed
novel
namely
C12H28NCuCl2
C20H48N2Cu4Cl6,
with
significantly
lower
points
(86
122
°C),
enabling
remarkable
moldability.
Intriguingly,
this
investigation
demonstrates
that
aging
luminescence-quenching
phenomena
observed
in
C20H48N2Cu4Cl6
crystals
resulting
from
air
oxidation
can
be
effectively
reversed
through
controlled
heat
treatment.
The
exhibit
broadband
emission
photoluminescence
quantum
yields
74.78%
46.52%,
respectively.
Furthermore,
displays
bright
radioluminescence,
showing
an
internal
X-ray
to
light
conversion
efficiency
36
506
photons/MeV
under
steady
state
illumination.
inherent
melt
processability
these
materials
empowers
transformation
into
diverse
shapes
suitable
for
practical
Herein,
a
sizable
scintillator
screen
(∼10
cm
×
7
cm)
was
successfully
prepared
melt-processing
method,
achieving
imaging
resolution
9
line
pairs
per
millimeter
(9
lp/mm).
This
study
potential
melt-processable
halides
applied
various
applications,
because
unique
properties,
including
facile
processing,
moldability,
luminescence.
ACS Materials Letters,
Journal Year:
2023,
Volume and Issue:
6(1), P. 203 - 211
Published: Dec. 14, 2023
Phase-change
materials
(PCMs)
have
spurred
intensive
studies
for
information
storage
owing
to
huge
and
drastic
changes
in
physical
properties
(i.e.,
optical
resistivity)
during
the
phase
transitions
between
crystalline-amorphous
crystalline-melting-glassy
states.
However,
limited
switching
greatly
hinder
their
development
applications.
Herein,
we
report
a
pair
of
hybrid
metal
halides
(R/S-2-HMM)3SbCl6
(2-HMM
=
2-(hydroxymethyl)morpholine
cation)
as
model
compounds
new
class
photoluminescent
PCMs.
They
undergo
stable
melt
process
become
amorphous
glass
by
melt-quenching.
The
crystalline
exhibits
near-unity
yellow
photoluminescence
with
95%
quantum
yield
due
radiative
recombination
self-trapped
excitons
excited
state
[SbCl6]3–
octahedra.
an
orange
emission
very
low
good
transparency
400–800
nm
range.
Drastic
via
crystal-glass
transition
is
exploited
rewritable
phase-change
memory,
exemplified
4
×
array
device.
robust
crystal–liquid–glass
open
avenue
PCMs
further
applications
remote
storage,
sensing,
display.
Abstract
Chiral
perovskites
are
considered
as
promising
candidates
for
circularly
polarized
luminescence
(CPL)
light
source,
by
attracting
the
broader
scientific
community
their
applications
in
chiral
optoelectronics
and
spintronics.
However,
it
is
still
a
great
challenge
to
achieve
both
substantial
photoluminescence
asymmetry
(
g
CPL
)
high
quantum
yield
(PLQY)
simultaneously
brightness
due
limitations
associated
with
magnetic
transition
dipole
moments.
Herein,
this
problem
overcome
large
of
1.6×10
−2
PLQY
56%
perovskite
through
element
doping
strategy.
The
substitution
Pb
2+
ion
smaller
Mn
ions
shrinks
crystal
lattice
around
[MnBr
6
]
4−
octahedra,
amplifying
asymmetric
distortion
surrounding
ions.
Moreover,
can
harvest
photoexcitation
energy
perovskites,
its
spin‐flipping
characteristics
enable
highly
efficient
from
d–d
on
levels.
Furthermore,
strategy
proven
be
universal
tactic
enhancing
confirmed
series
1D‐
or
2D‐chiral
various
ligands
halogens.
findings
provide
an
in‐depth
understanding
structure‐property
relationship
toward
optoelectronic
spintronic
applications.
