Near‐Unity Internal Quantum Efficiency and High Thermal Stability of Sr3MgGe5O14: Cr3+ Phosphor for Plant Growth
Laser & Photonics Review,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 8, 2025
Abstract
Near‐infrared
phosphor‐converted
light‐emitting
diodes
(NIR
pc‐LEDs)
are
regarded
one
of
the
most
promising
light
sources
for
food
analysis,
plant
growth,
bioimaging,
night
vision,
and
so
on.
Cr
3+
‐activated
NIR
phosphors
have
garnered
increasing
attention
due
to
their
exceptional
photoluminescence
properties
pc‐LED.
However,
them
suffer
from
poor
thermal
stability
or
low
efficiency
which
limits
large‐scale
application.
Herein,
a
novel
Sr
3
MgGe
5
O
14
:
(SMGO:
)
phosphor
is
presented,
exhibits
broadband
emission
ranging
range
650–1000
nm
with
peak
at
735
nm.
SMGO:
0.005Cr
demonstrates
an
almost
near‐unity
internal
quantum
(99.4%)
excellent
quenching
performance
(
I
423
K
/I
298
=
86%).
First‐principles
theory
calculation
indicates
that
ions
preferentially
occupy
[Ge2/MgO
4
]
[Ge3O
sites
high
doping
concentration
within
SMGO
host,
illustrating
mechanism.
Furthermore,
pc‐LED
manufactured
by
utilizing
445
blue
LED
chip,
output
power
140.5
mW
photoelectric
conversion
15.5%
300
mA.
Potential
applications
growth
detection
several
mental
also
demonstrated,
demostrates
its
application
in
growth.
Язык: Английский
Broadband near-infrared phosphor SrGe4O9:Cr3+ for NIR-pc-LED applications
Ceramics International,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 1, 2025
Язык: Английский
Thermally Stable Broadband Cr3+-Doped RbAl3P6O20 Phosphor for Near-Infrared Spectroscopy Applications
Inorganic Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 12, 2025
The
research
on
near-infrared
(NIR)
phosphors
has
become
a
trending
topic,
as
their
optical
properties
directly
impact
the
performance
of
NIR
phosphor-converted
light-emitting
diode
(pc-LED).
pc-LED
emerged
multifunctional
light
source
across
various
fields
due
to
its
unique
advantages
high
penetration
and
invisibility.
Herein,
peculiar
broadband
NIR-emitting
phosphor
is
presented,
RbAl3P6O20:
Cr3+
(RAPO:
Cr3+),
with
an
emission
range
from
650
1000
nm
peaking
at
∼785
full-width
half-maximum
(fwhm)
∼1900
cm–1.
Gaussian
fitting
analysis
reveals
that
originates
Cr3+,
occupying
two
different
octahedral
sites
in
host.
optimized
RAPO:
0.08Cr3+
exhibits
internal
quantum
efficiency
60%
excellent
thermal
stability
(90%
423
K).
application
devices
was
evaluated
by
assembling
InGaN-based
LED
(450
nm),
achieving
remarkable
output
power
27.9
mW
120
mA.
results
demonstrate
optimistic
for
photoelectron
(pc-LED)
sources.
Язык: Английский
A novel high-efficiency near-infrared phosphor Mg0.9Ta2Zn2.1O8:Cr3+,Yb3+ for spectroscopy applications
Journal of Materials Chemistry C,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Introducing
Yb
3+
into
Mg
0.9
Ta
2
Zn
2.1
O
8
:Cr
adjusts
the
FWHM,
increases
EQE,
and
enhances
luminous
intensity
thermal
stability.
A
NIR
pc-LED
using
a
465
nm
chip
MTZO:Cr
,Yb
phosphor
is
applied
in
multifunctional
optical
applications.
Язык: Английский
Broadband NIR phosphor with high external quantum yield and application of smoke penetration imaging
Journal of Luminescence,
Год журнала:
2025,
Номер
283, С. 121275 - 121275
Опубликована: Апрель 23, 2025
Язык: Английский
Tunable Broadband NIR-II Emission via Cr4+-Er3+ Energy Transfer in CaMgGeO4:Cr4+,Er3+ Phosphors for Nondestructive Analysis
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(45), С. 62402 - 62410
Опубликована: Ноя. 5, 2024
Although
there
have
been
numerous
reports
on
broadband
near-infrared
(NIR)
emitting
phosphors,
their
emissions
are
mainly
concentrated
in
the
range
of
700–1000
nm
(NIR-I).
Herein,
we
successfully
synthesized
a
phosphor
CaMgGeO4:Cr4+(CMG:Cr4+)
with
an
emission
1000–1600
(NIR-II).
The
introduction
Er3+
ions
into
CMG:Cr4+
resulted
wider
CaMgGeO4:Cr4+,Er3+
(fwhm
=
361
nm),
compensating
for
luminescence
1500–1600
nm.
More
importantly,
energy
transfer
from
Cr4+
to
has
discovered.
Furthermore,
NIR
pc-LED
was
fabricated
by
combining
CMG:Cr4+,Er3+
590
chip.
changes
intensity
and
profile
transmission
spectra
light
passing
through
different
liquids
reveal
its
potential
application
organic
compound
recognition.
This
work
opens
direction
development
NIR-II
phosphors.
Язык: Английский
Concentration-Dependent NIR emission of Cr3+ in a Two-site Occupancy within K4Ga3Ta(PO4)6
Journal of Alloys and Compounds,
Год журнала:
2024,
Номер
unknown, С. 177826 - 177826
Опубликована: Ноя. 1, 2024
Язык: Английский
Achieving an efficient near-infrared luminescence and wide-range spectral tunability in garnet Na2CaHf2Ge3O12:Cr3+ phosphor
Optics Letters,
Год журнала:
2024,
Номер
50(2), С. 634 - 634
Опубликована: Дек. 17, 2024
Near-infrared
(NIR)
phosphor-converted
light-emitting
diode
(pc-LED)
has
emerged
as
the
most
promising
NIR
light
source,
highlighting
importance
of
exploring
phosphors
with
excellent
efficiency
and
sufficient
spectral
coverage.
Herein,
a
garnet
Na
2
CaHf
Ge
3
O
12
:Cr
3+
phosphor
an
internal
quantum
(IQE)
79.2%
been
developed,
which
exhibits
relatively
long
wavelength
emission
peak
at
830
nm
full
width
half
maximum
(FWHM)
144
nm.
Moreover,
can
be
gradually
tuned
to
903
intensity
maintaining
over
60%
utilizing
chemical
unit
co-substitution
strategy.
Thus,
developed
material
in
this
work
wide-range
tunability,
being
for
multifunctional
spectroscopy
applications.
Язык: Английский