Luminescence,
Journal Year:
2025,
Volume and Issue:
40(3)
Published: March 1, 2025
ABSTRACT
Phosphors
for
white
light
emitting
diode
(WLED)
have
been
attracting
the
attention
of
researchers
to
obtain
devices
with
a
high
color
rendering
index
(CRI)
and
low
correlated
temperature
(CCT).
Herein,
broadband
orange
phosphor
Lu
2
CaMg
Si
3
O
12
:Ce
3+
is
prepared,
vacancy
created
in
lattice
regulate
structure
this
phosphor.
This
can
be
excited
well
by
blue
emit
ranging
from
500
750
nm.
By
decreasing
content
lattice,
band
gap
matrix
widened.
Besides,
emission
Ce
garnet
improved,
1.84
reached
maximum
all
samples.
The
thermal
stability
maintains
75.5%
at
423
K
compared
that
298
K.
WLED
device
fabricated
via
coating
mixtures
cyan
Ca
Sc
onto
chip.
shows
CRI
87.9
CCT
4167
K,
verifying
great
potential
WLED.
Research Square (Research Square),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 11, 2024
Abstract
Er3+
and
Yb3+
doped
CaTiO3
phosphors
were
prepared
using
combustion
synthesis.
The
synthesized
samples
underwent
comprehensive
analysis
to
evaluate
their
structural,
morphological,
optical
properties.
This
encompassed
techniques
such
as
X-ray
powder
diffraction,
field
emission
scanning
electron
microscopy,
photoluminescence
investigations.
A
meticulous
luminescence
investigation
was
conducted
on
the
samples.
study
revealed
that
erbium
ions
(Er3+)
exhibited
distinct
green
red
emissions
when
subjected
excitation
by
a
980
nm
infrared
(IR)
source.
These
attributed
2H11/2,
4S3/2
→
4I15/24F9/2
electronic
transitions,
respectively.
up-conversion
process
of
phosphor,
CaTiO3:Yb3+,
Er3+,
examined
through
power-dependent
spectra.
Subsequently,
rate
equation
model
proposed
elucidate
this
process.
To
thermosensitive
capabilities
temperature-dependent
responses
different
thermally
non-thermally
linked
lines
associated
with
investigated.
Temperature
sensing
measurements
performed
between
303
583
K
fluorescence
intensity
ratio
technique.
Relative
sensitivities
1.14,
1.66,
0.15,
0.33%
K−
1
observed
across
transitions.
By
utilizing
heat
IR
inputs,
versatility
phosphor
in
designing
logic
gates
demonstrated.
scheme
enabled
us
attain
notable
switching
approximately
170.86%
for
AND
gate
about
72.28%
INHIBIT
gate.
exhibits
considerable
potential
versatile
material
suitable
applications
both
future
molecular
devices
thermometry.
Review of Scientific Instruments,
Journal Year:
2024,
Volume and Issue:
95(8)
Published: Aug. 1, 2024
The
advancement
of
the
aviation
sector
has
made
temperature
measurement
technology
for
aero-engine
turbine
blades
essential
maintaining
engine’s
safe
and
steady
performance.
non-contact
is
a
trending
research
focus
in
blade
due
to
its
benefits
not
requiring
direct
touch
with
object
being
measured
suitability
high-temperature
high-speed
conditions.
This
paper
provides
concise
overview
various
key
methods
aero-engines,
such
as
fluorescence
measurement,
fiber-optic
radiation
measurement.
It
discusses
principle,
technical
characteristics,
current
status
both
domestically
internationally.
Based
on
this,
this
Review
further
main
challenges
faced
by
development
trend
future.
