Inorganic Chemistry,
Год журнала:
2024,
Номер
63(19), С. 8764 - 8774
Опубликована: Апрель 30, 2024
In-based
halide
perovskites
have
attracted
a
lot
of
attention
because
their
unique
broadband
emission
properties.
Herein,
series
hybrid
(H2MP)2InCl7·H2O
(1),
(H2EP)2InCl7·H2O
(2),
(H2MP)2InBr7·H2O
(3),
and
(H2EP)2InBr7·H2O
(4)
were
synthesized
under
the
control
halogen
ions
organic
cations.
1,
2,
4
exhibit
obvious
photoluminescence
properties
with
peaks
at
392,
442,
652
nm,
respectively.
The
effects
different
components
on
crystal
structure
are
discussed
by
calculating
structural
distortion
[InX6]3–
octahedron.
1
significantly
improved
after
Sb3+
doping
PLQY
values
57.12
41.53%.
Finally,
white
LED
was
successfully
fabricated
two
doped
compounds
coated
onto
365
nm
blue
chip.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
We
developed
Ni
2+
-doped
(Sr/Ba)
2
MgMoO
6
double
perovskite
molybdate-based
solid-solution
long
wavelength
near-infrared
luminescence
(1000–2000
nm)
phosphors,
which
shiftss
in
the
range
of
1400–1610
nm
by
simple
adjustment
Sr/Ba
ratio.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(44), С. 60599 - 60607
Опубликована: Окт. 22, 2024
Near-infrared
phosphor-converted
light-emitting
diodes
(NIR
pc-LEDs)
as
a
new
NIR
light
source
has
outstanding
application
potential
in
the
fields
of
spectroscopy
analysis,
sensing,
imaging,
and
pattern
recognition.
Therefore,
development
phosphors
with
good
luminescence
thermal
stability
attracted
much
attention.
To
this
end,
we
developed
LiAlO2:Cr3+
garnet-type
by
high-temperature
solid-state
reaction
method.
Under
405
nm
excitation,
Cr3+
ions
located
tetrahedrons
LiAlO2
emit
emission
broadband
that
covers
650-900
mixed
several
sharp
narrowband
R-line
emissions,
which
showed
excellent
integrated
intensity
measured
at
573
K
is
∼90.86%
303
caused
structural
rigidity
low
expansion
coefficient
matrix
material.
An
pc-LED
device
assembled
optimized
commercially
available
purple
LED
chip
emitted
output
power
∼98.172
mW
driving
current
300
mA
demonstrated
an
electro-optical
conversion
efficiency
∼9.09%,
while
it
night
vision
monitoring
biomedical
imaging.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(46), С. 63831 - 63839
Опубликована: Ноя. 12, 2024
Near-infrared
(NIR)
light
allows
fast
and
nondestructive
detection
with
deep
penetration
into
biological
tissues
is
widely
used
in
food
inspection,
biomedical
imaging,
night
vision
security,
other
fields.
Cr3+-doped
NIR
first
region
(NIR-I)
phosphors
have
many
interesting
features
that
attracted
a
lot
of
attention
recently.
However,
practical
issues,
such
as
low
photoluminescence
quantum
efficiency
poor
thermal
stability,
need
to
be
addressed.
We
synthesized
Lu2SrAl4SiO12
garnet-type
using
high-temperature
solid-state
reaction
method.
Under
blue-light
(@
430
nm)
excitation,
the
exhibited
broadband
NIR-I
emission
range
600–1000
nm,
an
peak
at
710
nm.
This
system
unique,
had
multipeak
sharp-line
superposition
Cr3+
ions
were
situated
relatively
strong
crystal
field
environment,
opposed
weak
environment
for
matrix.
The
optimal
doping
content
was
2
mol
%,
its
internal
∼76.8%.
Surprisingly,
this
phosphor
showed
antithermal
quenching
effect,
integrated
luminescence
intensity
measured
573
K
206.3%
303
K.
found
caused
by
extremely
expansion
coefficient
rigid
structure
matrix
temperature
range,
well
weakening
electron–phonon
coupling
increasing
temperature.
optimized
packaged
blue
chip
phosphor-converted
light-emitting
diode
device.
source
device
output
power
119.02
mW
electro-optical
conversion
11.02%
under
driving
current
300
mA.
application
potential
demonstrated
high-resolution
imaging.
The Journal of Physical Chemistry C,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 6, 2025
Low-dimensional
In(III)
halide
perovskites
have
become
one
of
the
most
attractive
classes
light-emitting
materials
due
to
their
tunable
and
high
photoluminescence
efficiency.
However,
synthesis
is
still
a
challenge.
Here,
we
report
two
novel
Na(I)–In(III)
double
perovskite-related
compounds
(MA)2NaInCl6
(MA)2NaInBr6
Sb3+-doped
counterparts.
Both
crystallize
in
one-dimensional
(1D)
face-sharing
chain
structures
with
trigonal
P3̅m1
symmetry.
show
wide
direct
band
gaps
5.3
3.9
eV,
respectively.
While
both
are
nonemissive
pristine
forms,
5%
green
(555
nm)
yellow
(585
emission
quantum
yields
13.8
53.6%,
For
(MA)2NaInBr6,
PLQY
67.64%
was
achieved
1%
Sb
doping.
Variable-temperature
PL
studies
density
functional
theory
calculations
indicate
that
Sb3+
ion
introduces
self-trapped
excitonic
(STE)
states,
which
responsible
for
high-efficiency
emission.
Our
findings
significantly
expand
scope
low-dimensional
photoluminescent
In(III)-based
metal
perovskites.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
17(19), С. 28366 - 28373
Опубликована: Май 6, 2025
Near-infrared
phosphor-converted
light-emitting
diodes
(NIR
pc-LEDs),
a
widely
used
NIR
light
source,
are
typically
prepared
by
sealing
the
phosphor
powder
and
an
LED
chip
with
epoxy
resin.
One
issue
that
pc-LEDs
frequently
encounter
is
aging
deterioration
of
resin
over
time,
which
leads
to
self-absorption
sharp
decline
in
emission
efficiency.
Here,
we
report
synthesis
chemically
stable
luminescent
material
composed
Cr3+-doped
Ba2NaNb5O15
nanocrystals
measuring
10-15
nm,
Cr3+
ions
located
octahedral
centers
nanocrystals.
Under
460
nm
excitation,
transparent
glass-ceramic
exhibited
broadband
range
600-1400
originated
from
electronic
transition
excited
state
4T2
ground
4A2.
The
peak
was
at
∼810
FWHM
∼230
internal
quantum
efficiency
reached
∼0.81%.
We
constructed
pc-LED
device
using
optimized
NIR-emitting
glass-ceramics
commercially
available
blue
chip,
demonstrating
its
promising
application
night-vision
lighting.
Our
study
provides
basis
for
preparation
glass-ceramic-based
devices
as
improved
alternative
solid-state
illumination.
