A Narrow-Band Green-Emitting Lmao:Ce3+, Mn2+ Phosphor: Structure, Energy Transfer and Luminescence
Опубликована: Янв. 1, 2025
A
narrow-band
green-emitting
LaMgAl11O19:
Mn2+,
Ce3+
phosphor
was
synthesized
by
the
high-temperature
solid-state
reaction.
Its
phase
formation,
luminescence
properties
and
energy
transfer
from
to
Mn2+
were
studied.
Under
excitation
at
320
nm,
intensity
of
525
nm
remarkably
enhanced
co-doping
with
ion.
Meanwhile,
measured
photoluminescence
(PL)
decay
times
proved
that
a
vigorous
occurred
between
ions.
The
mechanism
in
LaMgAl11O19
is
dipole-dipole
interaction,
calculated
critical
distance
14.24
Å,
quenching
concentration
being
approximately
0.2.
high
activation
0.2335
eV
demonstrates
this
has
good
thermal
stability,
150
°C
92%
room
temperature.
These
results
indicate
Ce3+-Mn2+
co-doped
green
potential
for
application
wide
color
gamut
wLED
backlighting.
Язык: Английский
A Narrow-band Green-Emitting LMAO:Ce3+, Mn2+ phosphor: Structure, energy transfer and luminescence
Journal of Luminescence,
Год журнала:
2025,
Номер
unknown, С. 121191 - 121191
Опубликована: Март 1, 2025
Язык: Английский
The Importance of Metal Ion Impurity Bands in the Photoluminescence of Halide Double Perovskites
Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 25, 2025
Abstract
Double
perovskite
halides
are
attracting
considerable
attention
due
to
their
applications
in
solar
cells
and
photovoltaics.
It
is
observed
that
many
(more
than
20)
publications
top
journals
have
associated
spectral
features
emission
the
region
at
460–470
nm
with
“pristine”
materials.
This
leads
not
only
false
observations
but
also
incorrect
conclusions
concerning
transformation
of
dark
into
bright
excitons
or
boosting
self‐trapped
exciton
(STE)
emission.
The
use
phrase
STE
commented
upon.
Most
commonly,
spectra
present
correspond
those
antimonate
(III)
ion,
Sb
3+
.
should
be
interpreted
terms
s
p
–
2
orbital
transitions
rather
excitonic
transitions.
compounds
Cs
NaRECl
6
(RE
=
Y,
Gd)
synthesized
by
two
major
methods,
namely:
evaporation
hydrothermal
syntheses,
for
various
rare
earth
starting
materials,
order
demonstrate
effect
antimony
contamination.
Contamination
Mn
2+
ion
found
samples
double
susceptible
attack
moisture.
study
emphasizes
need
check
sample
synthesis
purity
carefully
monitor
integrity
Язык: Английский
Lead‐Free Rare‐Earth Based Halide Double Perovskites: From Fundamentals, Progress to Perspectives
Laser & Photonics Review,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 19, 2025
Abstract
Lead‐free
halide
double
perovskites
are
rapidly
gaining
prominence
as
a
nontoxic,
highly
stable,
and
versatile
alternative
to
traditional
lead‐based
perovskites,
notable
for
their
superior
optoelectronic
properties.
Among
these,
rare‐earth‐based
(RHDPs)
notably
stand
out.
Comprising
fifteen
lanthanide
elements
with
distinctive
electron
configurations
of
[Xe]
4f
n−1
5d
0−1
6s
2
(
n
=
1–15),
alongside
the
group‐IIIB
Yttrium
(Y)
Scandium
(Sc),
rare‐earth
(RE)
exhibit
great
potential.
These
17
RE
ions
(Sc
3+
,
Y
La
–Lu
)
offer
vast
landscape
crafting
numerous
RHDPs,
poised
properties
that
surpass
diversify
beyond
current
perovskite
standards.
Key
functionality
unique
luminescence
driven
by
self‐trapped
exciton
(STE)
recombination,
4f→4f
5d→4f
transitions,
enabling
applications
in
visible
infrared
light
emission
through
downshifting
up‐conversion.
This
review
thoroughly
articulates
foundational
including
structural‐property
relationships,
synthesis
methods,
optical
characteristics,
durability.
It
highlights
recent
advancements
across
range
fields
such
near‐infrared
emitting
diodes
(Vis&NIR
LEDs),
sensors,
anti‐counterfeiting
technologies.
Additionally,
discusses
prevailing
challenges
associated
RHDP
materials
applications,
offering
insights
future
directions.
Язык: Английский
A Nontoxic and Environmentally Friendly NIR‐II Phosphor for Night Vision, Bio‐Imaging, Large‐Scale Detection, and Information Anti‐Counterfeiting with High‐Resolution Imaging
Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 21, 2025
Abstract
Near‐infrared
second
region
(NIR‐II,
1000–1600
nm)
has
deeper
penetration
depth,
higher
sensitivity,
and
spatial
resolution
than
NIR
first
(NIR‐I,
700–1000
nm).
However,
Cr
3+
Ni
2+
‐doped
NIR‐I/NIR‐II
phosphor
with
serious
pollution
toxicity
issues
pose
limitations
for
the
application
of
these
phosphors.
Here,
Fe
Cs
2
NaLuCl
6
is
reported
by
grinding‐sintering
method,
which
shows
broadband
emission
in
range
nm
a
FWHM
≈309
nm,
while
PLQY
as
17.29%,
under
395
excitation.
The
unique
this
originates
from
activation
center
located
an
environment
extremely
weak
octahedral
crystal
field
provided
lattice.
A
pc‐LED
device
assembled
optimal
encapsulated
commercially
available
ultraviolet
LED
chip.
Which
output
23.5
mW
electro‐optical
conversion
efficiency
6.53%
100
mA
driving
current,
potential
demonstrated
night
vision,
bio‐imaging,
large‐scale
detection,
information
anti‐counterfeiting
high‐resolution
imaging.
Язык: Английский