ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
17(1), P. 1509 - 1521
Published: Dec. 20, 2024
Shortwave
infrared
(SWIR)-emitting
materials
have
emerged
as
superior
light
sources
with
increasing
demand
for
potential
applications
in
noninvasive
analysis,
night
vision
illumination,
and
medical
diagnosis.
For
developing
next-generation
SWIR
phosphor-converted
light-emitting
diodes
(pc-LEDs),
the
scarcity
of
intense
blue-light-pumped
broadband
luminescent
poor
thermal
stability
current
Ni2+-activated
phosphors
are
ongoing
challenges.
Here,
a
blue-light-excitable
(440
nm)
Y3Al2Ga3O12:Cr3+,Ni2+
phosphor
ultrawide
emission
centered
at
∼1430
nm
(FWHM
∼264
is
reported.
The
efficient
Cr3+
→
Ni2+
energy
transfer
exploited
remarkable
enhancement
18-fold
under
blue-light
excitation.
Significantly,
excellent
(90%
440
K)
band
obtained
codoped
which
best
among
reported
phosphors.
Besides,
experimental
techniques
(XANES
EXAFS)
density
functional
theory
calculations
employed
to
investigate
local
structure
propose
[GaO6]
octahedrons
favorable
occupation
sites
Ni2+/Cr3+
ions.
A
pc-LED
fabricated
using
blue
chip
proof
concept
invisible
illumination
technology,
nondestructive
spectroscopic
anticounterfeiting,
imaging
applications.
This
work
offers
effective
insights
into
transfer-assisted
presents
thermally
robust
Cr3+-Ni2+-codoped
designing
future
mini-SWIR
pc-LEDs
spectroscopy
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(42), P. 57316 - 57324
Published: Oct. 11, 2024
Here,
near-infrared
broad
dual-band
emission
phosphors
were
achieved
through
energy
transfer
between
Cr3+
and
Ni2+
ions
in
the
β-Ga2O3
host.
All
samples
co-doped
with
exhibit
covering
600–1700
nm
under
430
excitation.
Thanks
to
doping
of
ions,
intensity
Ga2O3:Cr3+,
has
increased
by
about
2.4
times
internal
quantum
efficiency
83.2%
compared
Ga2O3:Ni2+
phosphors.
Meanwhile,
when
fluorescence
lifetime
was
monitored
at
745
nm,
an
efficient
host
verified.
Due
significant
differences
temperature-sensitive
properties
a
thermometer
designed
utilizing
ratio
technology,
achieving
maximum
relative
sensitivity
5.26%
K–1,
which
surpasses
most
optical
temperature
measurement
This
suggests
that
hold
promise
as
potential
candidates
for
materials.
Additionally,
broadband
sample
been
investigated
applications
component
analysis
night
vision,
demonstrating
its
versatility
multifunctional
applications.
