Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 26, 2024
Abstract
The
development
of
stable
and
deformation‐free
crystal
structures
perovskites
their
derivatives
are
crucial
for
electroluminescent
devices.
In
this
article,
a
novel
transparent
manganese‐based
perovskite
derivative
K
4
MnBr
1.33
Cl
4.67
is
synthesized
with
mixed
halogens.
For
the
unique
octahedral
structure,
Jahn‐Teller
distortion,
typically
present
in
such
structures,
completely
suppressed,
resulting
high
environmental
stability
luminescence
spectrum.
flexible
devices,
peak
current
density,
average
external
quantum
efficiency
on
each
side
maximum
brightness
45
mA
cm
−2
,
4.9%,
2800
cd
m
respectively.
best
half‐life
LED
reaches
10
h
starting
luminance
100
.
As
first
lead‐free
LED,
it
features
an
outstanding
transparency
76%
excellent
flexibility
intensity
maintenance
90%
after
2000
bending
cycles.
This
work
shows
that
manganese
can
provide
promising
way
to
fabricate
high‐performance
LEDs.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
12(12)
Published: Jan. 15, 2024
Abstract
As
a
class
of
emerging
photoluminescent
materials,
hybrid
halide
crystals
have
drawn
research
attention
for
their
potential
application
in
the
fields
light‐emitting,
security,
and
waveguide.
Nevertheless,
containing
antimony
with
long‐term
stability
tunable
light
emission
are
still
increasingly
demand.
In
this
work,
serial
new
(BZA)
2
ZnCl
4
·2H
O:
x
Sb
3+
(
=
0–0.2,
represents
reaction
ratio)
SbCl
5
synthesized
(BZA
2,4‐diamino‐6‐phenyl‐1,3,5‐triazine).
crystals,
cations
replace
partial
Zn
2+
to
form
[SbCl
]
−
tetrahedron.
Red
caused
by
substitution
enhances
as
doping
rate
increases,
resulting
from
blue
pink
finally
dark
red.
There
two
kinds
crystal.
Sb(1)
has
sixfold
coordination
Cl
[Sb(1)Cl
]∞
1D
zigzag
chain.
Sb(2)
atom
adopts
fivefold
is
separated
each
other
BZA
+
cations.
crystal
shows
bright
orange‐yellow
photoluminescence
quantum
yield
45%.
Moreover,
organic–inorganic
metal
excellent
stability,
phase
luminescence
keeping
nearly
unchanged
after
more
than
six
months
ambient
air.
Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
63(22), P. 10296 - 10303
Published: May 22, 2024
Metal
halides
have
drawn
great
interest
as
luminescent
materials
and
scintillators
due
to
their
outstanding
optical
properties.
Exploring
new
types
of
phosphors
with
easy
production
processes,
excellent
photophysical
properties,
high
light
yields,
environmentally
friendly
compositions
is
crucial
quite
challenging.
Herein,
a
novel
Mn(II)-based
metal
halide
(4-BTP)2MnBr4
was
produced
using
facile
solvent
evaporation
method,
which
exhibited
strong
green
emission
peaking
at
524
nm
from
the
d–d
transition
tetrahedral-coordinated
Mn2+
ion
near-unity
quantum
yield.
The
prepared
white
light-emitting
diode
device
has
wide
color
gamut
100.7%
NTSC
CIE
chromaticity
coordinates
(0.32,
0.32).
In
addition,
demonstrates
characteristics
in
X-ray
scintillation,
including
yield
98
000
photons/MeV,
sensitive
detection
limit
37.4
nGy/s,
resistance
radiation
damage,
successful
demonstration
imaging
resolution
21.3
lp/mm,
revealing
potential
for
application
diagnostic
medical
industry
detection.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(26), P. 33780 - 33788
Published: June 19, 2024
A
quantitative
water
detection
method
is
urgently
needed
in
storage
facilities,
space
exploration,
and
the
chemical
industry.
Although
numerous
physical
techniques
have
been
widely
utilized
to
determine
content,
they
still
suffer
from
many
disadvantages
such
as
highly
expensive
special
instruments,
complicated
analysis
processes,
etc.
Hence,
a
convenient,
rapid,
sensitive
desirable.
Herein,
we
developed
visual
fluorescence
sensing
technology
for
based
on
reversible
PL
off-on
switching
of
organic–inorganic
hybrid
zero-dimensional
(0D)
manganese
halides.
In
this
work,
family
halides
were
synthesized
through
facile
solution
method,
namely,
[NH4(18-Crown-6)]2MnBr4,
[Ca(18-Crown-6)·3H2O](18-Crown-6)MnBr4,
[NH4(dibenzo-18-Crown-6)]2MnBr4,
[Ca(dibenzo-18-Crown-6)·2H2O]MnBr4.
Excited
by
UV
light,
these
crystalline
exhibit
strong
green
light
emissions
d–d
electron
transition
Mn2+
with
near-unity
photoluminescence
quantum
yield
submillisecond
lifetime.
Benefiting
dynamic
weak
ionic
bonding
interactions,
0D
display
water-response
on/off
luminescence
but
fail
any
other
aprotic
solvents.
Therefore,
can
be
explored
ultrafast
probes
detect
trace
amount
organic
solvents
multiple
superiorities
rapid
response
time
(<
2
s),
ultralow
limit
(9.71
ppm),
excellent
repeatability,
The
luminescent
also
provides
binary
optical
gate
advanced
applications
anticounterfeiting
information
security,
Small,
Journal Year:
2023,
Volume and Issue:
20(18)
Published: Dec. 11, 2023
Abstract
Phosphors
with
narrow‐band
green
emissions
and
high
photoluminescent
quantum
efficiency
(PLQY)
are
significantly
required
for
backlighting
displays
wider
color
gamut.
In
this
work,
two
centimeter‐sized
manganese
(II)
halide
single
crystals
TMG
2
MnCl
4
MnBr
(TMG
=
1,1,3,3‐tetramethylguanidine)
synthesized,
exhibiting
bright
PLQYs
up
to
62%
90%,
respectively.
The
light
emission
is
located
at
520
nm
a
full‐width
half‐maximum
(FWHM)
of
only
57
nm.
photoluminescence
mechanisms
elaborated.
Two
white‐light‐emitting
diodes
(BD‐WLEDs)
based
on
them
fabricated,
the
widest
gamut
122%
National
Television
Standards
Committee
(NTSC),
luminous
efficacy
reached
≈93
lm
W
−1
excellent
luminescence
stability
temperatures.
These
properties
indicate
potential
applications
tetrahedral
hybrids
in
wide‐color
displays.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
12(22)
Published: June 25, 2024
Abstract
X‐ray
imaging
serves
a
critical
role
across
diverse
sectors,
including
medical
diagnostics,
industrial
surveillance,
security,
and
space
exploration.
This
study
delves
into
the
unique
properties
of
novel
polar
crystal,
[FMPPA]ZnBr
4
(FMPPA
=
protonated
3‐fluoro‐4‐(4‐methyl‐1‐piperazinyl)aniline),
characterized
by
0D
metal
halide
structure.
crystal
features
[ZnBr
]
2−
tetrahedra
A‐site
organic
amine
ion
[FMPPA]
2+
rings.
With
high
photoluminescence
quantum
yield
(≈70%)
minimal
self‐absorption,
demonstrates
exceptional
scintillation
performance
under
excitation,
producing
29300
±
600
photons
MeV
−1
achieving
low
detection
limit
0.352
µGy
air
s
,
surpassing
conventional
3D
perovskite
nanocrystals.
Beyond
superior
performance,
this
scintillator
meets
demand
for
efficient
light
emitters.
Moreover,
it
consistently
achieves
≈12.5
lp
mm
high‐resolution
imaging.
Additionally,
exhibits
nonlinear
optical
response,
benchmark
KH
2
PO
1.8
times.
investigation
introduces
new
structure
framework,
paving
way
development
integrated
optoelectronic
materials
with
both
linear
properties.
