ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(15), P. 17967 - 17977
Published: July 29, 2024
Lead-free
tin-based
perovskite
quantum
dots
(QDs)
are
considered
the
most
promising
alternatives
to
lead-based
perovskites,
but
their
potential
application
is
hindered
by
poor
stability.
This
issue
was
addressed
preparing
amorphous
glass-protected
CsSnBr3
QDs
through
meticulous
optimization
of
glass
structure.
Intriguingly,
self-crystallization
occurred
without
needing
heat
treatment.
We
found
that
glass-ceramic
composed
two
phases,
SnO2
and
CsSnBr3,
which
main
phase.
At
same
time,
tunability
luminescence
color
can
be
achieved
changing
silicon–boron
ratio
melting
temperature
in
matrix.
Moreover,
due
complete
encapsulation
matrix,
exhibited
remarkable
stability
a
high
photoluminescence
efficiency
(51.5%).
Subsequently,
incorporated
with
an
ultraviolet
chip
produce
white
light-emitting
diode
(WLED),
its
plant
growth
explored.
Journal of Materials Chemistry C,
Journal Year:
2024,
Volume and Issue:
12(32), P. 12353 - 12362
Published: Jan. 1, 2024
The
thermally
enhanced
luminescence
mechanism
of
Al
2
(WO
4
)
:Yb/Er
with
low
thermal
expansion
is
revealed.
High
sensitivity
optical
thermometry
realized
via
the
difference
in
red/green
temperature
response.
Abstract
Eu
3+
‐activated
red‐emitting
inorganic
phosphors
have
been
favored
highly
for
their
classical
5
D
0
→
7
F
J
(J
=
0,
1,
2,
3,
4)
emissions.
However,
the
fatal
drawbacks
of
poor
luminous
efficacy
and
weak
4
transition
persist,
resulting
in
ongoing
challenge
achieving
far‐red
emission.
This
research
reports
series
efficient
LnTeBO
(Ln
La
,
Y
Gd
):Eu
with
anomalously
strong
transition,
from
distorted
square
antiprism
[Ln/EuO
8
].
Both
thermal
stability
can
be
greatly
enhanced
via
simple
composition
variation.
]
antiprism‐triggered
2,4
transitions
are
elucidated
depth,
acquiring
ultra‐high
(IQE
95%,
EQE
40%,
AE
42%)
near‐zero
quenching
(99%@150°C
98%@200°C).
Subsequently,
versatile
utilizations
indoor
lighting,
plant
growth
security
ink
illustrated.
finding
establishes
a
deep
understanding
constructing
high‐quality
‐centered
structural
units
antiprism.
Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 10, 2025
Abstract
Far‐red
phosphors
have
emerged
as
a
desirable
research
hotspot
owing
to
their
critical
role
in
promoting
plant
growth.
Especially,
Eu
3+
ions
typically
present
the
5
D
0
→
7
F
J
(J
=
0,
1,
2,
3,
4)
transitions,
which
overlap
with
far‐red
light
required
for
photosynthesis.
However,
achieving
high‐efficiency
emission
of
remains
challenging
due
weak
4
transition
and
concentration
quenching.
The
study
constructs
two
anomalously
efficient
garnet
A
3
Sc
2
C
O
12
(A
Y
,
Gd
.
Al
Ga
):Eu
high‐resolution
STEM
measurement
equipped
an
aberration
corrector
provides
direct
proofs
both
[EuO
8
]
configuration‐dependent
strong
origin
high
quenching
concentration.
Excitedly,
two‐component
substitution
(replacing
‐Al
‐Ga
)
triggers
near‐unity
internal
quantum
efficiency
(IQE
99.01%)
external
(EQE
38.73%)
:60%Eu
resulting
from
effective
modulation
/
transitions.
LEDs
device
based
on
exhibits
output
power
113
mW
at
300
mA.
Subsequently,
practical
applications
growth
underscore
significance
these
findings.
This
work
opens
new
path
development
highly
via
synergistic
effect
square
antiprism
configuration
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
12(20)
Published: May 3, 2024
Abstract
Developing
efficient
cyan‐green
phosphors
and
ultrathin
phosphor‐glass
composites
(PGCs)
with
remarkable
chemical
thermal
stability
is
important
for
fabricating
full‐visible‐spectrum
white
light‐emitting
diodes
(LEDs).
In
this
study,
a
garnet‐structured
phosphor,
known
as
Y
3
Sc
2
Ga
O
12
:Ce
(YSGG:Ce),
synthesized,
exhibiting
an
intense
excitation
peak
at
420
nm
broad‐emission
band
centered
507
nm.
Theoretical
analysis
indicates
that
phonon
characteristic
energy
of
90
meV
predominantly
involved
in
the
luminescence
process.
However,
phosphor
powder
exhibits
notable
quenching
phenomenon
temperatures
higher
than
220
K.
Ultrathin
PGCs
thickness
37
µm
are
manufactured
to
achieve
good
stability.
Three
types
subsequently
integrated
onto
412
blue
chips
prepare
LED
devices.
The
resulting
device
has
low
correlated
color
temperature
2925
K
impressive
color‐rendering
index
93.5,
its
precise
chromaticity
coordinates
aligned
black‐body
locus.
Therefore,
study
highlights
promising
applications
high‐efficiency
high‐quality
LEDs.
