Chemistry of Materials,
Journal Year:
2022,
Volume and Issue:
34(22), P. 10190 - 10199
Published: Nov. 7, 2022
Near-infrared
(NIR)
phosphor-converted
light-emitting
diodes
(pc-LEDs)
are
a
highly
efficient
perspective
NIR
light
source,
with
application
hindered
by
narrow
emission
band.
In
this
work,
we
broaden
the
of
new
series
phosphors
controlling
crystal
structure
disorder
through
cation
cosubstitution.
By
substituting
Ga3+
(Al0.68In0.32)3+,
create
Ga2–x(Al0.68In0.32)xO3:Cr3+
phosphor
in
which
average
size
is
maintained,
while
varies.
The
increased
deviation
radii
substitution
leads
to
electron–phonon
coupling,
resulting
spectrum
covering
650–1000
nm
range
30%
increase
full
width
at
half-maximum
(FWHM)
and
relatively
high
internal
quantum
efficiency
∼80%.
A
transition
from
β
phase
α
phase,
differs
undoped
parent,
created
pressure
possesses
ultra-broad-band
an
FWHM
∼190
nm.
This
work
shows
that
bandwidth
can
be
controlled
its
influence
on
Stokes
shift,
as
captured
effective
Huang–Rhys
factor.
Abstract
Non‐contact
ratiometric
luminescence
thermometry
continues
to
gain
popularity
over
decades
due
its
fascinating
features
of
high
accuracy,
fast
response,
and
simplicity.
In
this
regard,
rational
design
optical
thermometers
with
ultrahigh
relative
sensitivity
low
temperature
resolution
has
become
a
cutting‐edge
topic.
Herein,
intensity
ratio
thermometric
method
depending
on
the
emission
line
at
698
nm
(peak
1)
bands
713
721
(peaks
2
3)
Li
1.97
Zn
1.0292
Ge
3
O
8
:0.08%Cr
3+
is
proposed.
As
elevates
from
50
300
K,
undergoes
an
84‐fold
increase
while
show
opposite
decline
trend.
This
feature
enables
13.09%
K
−1
0.032
which
are
superior
most
reported
thermometers.
work
expected
provide
more
insights
for
designing
excellent
reliable
by
employing
Cr
activated
luminescent
materials.
Journal of Materials Chemistry C,
Journal Year:
2023,
Volume and Issue:
11(26), P. 8758 - 8766
Published: Jan. 1, 2023
The
GC
material
produces
excellent
blue
UC
emission
under
980
nm
or
1550
excitation,
where
the
level
(
2
H
9/2
)
could
form
a
novel
NTCL
11/2
–
with
other
energy
levels,
realizing
ultrahigh
sensitivity
low
temperature
sensing.
Chemical Engineering Journal,
Journal Year:
2024,
Volume and Issue:
487, P. 150363 - 150363
Published: March 12, 2024
Phase
transition-based
thermometers,
which
are
widely
known
for
their
remarkable
sensitivity
to
temperature
changes,
exhibit
a
narrow
range
owing
the
stoichiometry
of
host
material.
This
limits
applicability
optical
sensors
utilizing
structural
phase
transitions.
In
this
study,
we
introduce
co-doping
method
modulating
properties
luminescent
thermometers
influence
transition
temperature.
We
demonstrate
that
by
adjusting
ionic
radius
dopant
and
its
concentration,
can
be
finely
tuned
across
broad
spectrum.
The
proposed
technique
enables
customization
with
enhanced
sensitivities
practical
ranges
tailored
specific
user
requirements.
study
represents
crucial
advancement
towards
development
personalized
luminescence
thermometers.
Materials Advances,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
In
this
work,
we
investigate
the
impact
of
Bi
3+
doping
on
luminescence
properties
Eu
-activated
NaYb(MoO
4
)
2
phosphors
synthesized
via
conventional
solid-state
reaction
method.
Chemistry - Methods,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 21, 2025
Abstract
In
most
catalytic
processes,
thermal
energy
is
released
or
consumed
locally
in
a
reactor
due
to
the
exothermicity
endothermicity
of
chemical
reactions.
This
causes
actual
operating
temperature
catalyst
material
deviate
from
temperature,
which
can
lead
underperformance,
reduced
stability,
even
runaway.
Conventional
methods
measure
with
thermocouple
oven
bed,
suffer
complications
because
separation
between
sensor
and
material,
activity
thermocouple/coating
added
complexity
setup,
disruption
reactant
flow
heat
through
bed.
Here,
we
show
possibilities
challenges
luminescence
thermometry
as
an
analytical
technique
for
remote
monitoring
local
strongly
exothermic
high‐temperature
reaction
environment.
We
observe
that
lifetime
depends
not
only
but
also
on
oxygen
concentration,
introduce
significant
systematic
error
up
40
°C
recorded
temperature.
case
ratiometric
thermometry,
this
~5
°C.
use
confirm
its
applicability
oxidative
coupling
methane
(OCM)
process
at
high
temperatures,
showing
increase
100
°C,
relative
constant
under
inert
conditions.
Journal of Materials Chemistry C,
Journal Year:
2021,
Volume and Issue:
9(39), P. 13640 - 13646
Published: Jan. 1, 2021
Benefiting
from
a
proposed
distorted
octahedral
site
occupation
strategy
using
Cr
3+
,
we
demonstraed
high-efficiency
broadband
NIR-emitting
phosphor
LiScGe
2
O
6
:Cr
peaking
at
886
nm
with
full
width
half
maximum
of
160
and
record
external
quantum
efficiency
∼40%.
