The
phosphors
in
transmissive
laser-excited
white
lighting
play
the
core
role
of
wavelength
conversion,
but
they
also
act
as
micro
heat
sources
devices.
Since
are
normally
wrapped
by
polymer
packaging
materials
with
extremely
low
thermal
conductivity,
generated
is
hard
to
be
dissipated
time,
thus
resulting
a
sharp
temperature
rise
phosphor
layer
during
working
process,
and
even
lead
quenching
carbonization
under
high
power
scenarios.
To
tackle
above
problem,
an
in-plane
transfer
enhancement
strategy
forming
hexagonal
boron
nitride
(hBN)
alignment
using
hot-pressing
method
proposed
this
paper.
When
filling
mass
fraction
hBN
reaches
7.5
wt%,
conductivity
increases
89%
compared
that
traditional
without
hBN,
corresponding
maximum
surface
decreases
68.3
°C
driving
current
800
mA.
paper
provides
powerful
means
solve
local
issue
lighting,
may
hold
great
promise
for
further
application
Journal of Advanced Ceramics,
Год журнала:
2023,
Номер
12(11), С. 2075 - 2086
Опубликована: Сен. 20, 2023
Recently,
high-performance
color
converters
excitable
by
blue
laser
diode
(LD)
have
been
sprung
up
for
projection
display.
However,
thermal
accumulation
effect
of
is
a
non-negligible
problem
under
high-power
LD
irradiation.
Herein,
we
developed
novel
opto-functional
composite
(patterned
CaAlSiN3:
Eu2+
phosphor-in-glass
film-Y3Al5O12:
Ce3+
film@Al2O3
plate
with
aluminum
“heat
sink”)
via
management
methodology
combining
“phosphor
wheel”
and
sink”
the
lighting
source
This
new
design
makes
it
effective
to
transport
generated
phonons
away
reduce
ionization
process,
yield
stable
high-quality
white
light
brightness
4510
lm
@
43
W,
luminous
efficacy
105
lm/W,
correlated
temperature
3541
K,
rendering
index
80.0.
Furthermore,
film-converted
system
was
also
successfully
designed,
showing
more
vivid
than
traditional
LED-based
projector.
work
emphasizes
importance
upon
high
power
irradiation,
hopefully
facilitates
development
LD-driven
Journal of Advanced Ceramics,
Год журнала:
2023,
Номер
12(9), С. 1821 - 1832
Опубликована: Июль 24, 2023
Phosphor-in-glass
(PiG)
film
is
a
promising
luminescent
material
in
high-brightness
laser
lighting
for
its
advantages
of
high
efficiency,
outstanding
color
quality,
and
low-cost
preparation,
which
must
bear
power
(LP)
density
(LPD)
simultaneously
to
enable
high-luminance
light.
Herein,
spot
associated
high-saturation
PiG
was
proposed
transmissive
reflective
lighting.
Two
types
films
were
prepared
by
printing
sintering
La3Si6N11:Ce3+
(LSN)
phosphor-borosilicate
glass
pastes
on
sapphire
substrate
(PiG-S)
an
AlN
(PiG-A),
respectively.
The
with
perfect
crystal
structure
phosphor
reliably
bonded
the
substrates.
effects
areas
luminescence
saturation
LP
LPD
investigated
films.
With
increase
area
from
0.5
2.5
mm2,
threshold
gradually
raised,
while
decreased.
PiG-S
withstands
23.46
W
20.64
W/mm2,
enabling
white
light
luminous
flux
3677
lm.
PiG-A
41.12
35.56
2882
Moreover,
maintains
lower
working
temperature
compared
PiG-S,
temperatures
reduce
increasing
area.
results
demonstrate
that
realize
thresholds
simultaneously,
luminance
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 24, 2024
Abstract
Next‐generation
high‐brightness
laser
lighting
confronts
a
key
challenge
in
preparing
static
color‐converting
materials
with
remarkable
luminescence
saturation.
Herein,
novel
architecture
of
transmissive
Y
3
Al
5
O
12
:
Ce
3+
(YAG)
phosphor‐in‐glass
film
(PiGF)
double‐sided
sapphires,
i.e.,
sandwich
structured
sapphire@PiGF@sapphire
(S@PiGF@S)
composite,
is
designed
and
fabricated
by
thermocompression
sintering
technology.
This
kind
material
can
tolerate
high
power
density
(LPD)
for
the
efficient
thermal
channels
high‐energy
spot
away
from
PiGF
emitting
layer.
As
consequence,
optimized
S@PiGF@S
color
converter
yields
white
light
luminous
flux
(LF)
7602
lm
at
record
saturation
threshold
46.47
W·mm
−2
benefiting
its
low
working
temperature
merely
284
°C,
which
6.3
times
that
traditional
PiGF@sapphire
(1205
[email protected]
).
These
findings
verify
developed
enables
preferably
optical‐thermal
performances
promising
applications
lighting.
IEEE Electron Device Letters,
Год журнала:
2023,
Номер
45(2), С. 232 - 235
Опубликована: Дек. 21, 2023
In
this
letter,
a
laser-driven
white
light
source
with
high
luminescence
saturation
was
fabricated
by
combining
blue
laser
chips
and
an
Al2O3-doped
reflective
color
converter.
The
converter
prepared
printing
sintering
phosphor-in-glass
(PiG)
film
on
AlN
substrate.
Al2O3-PiG
intact
crystal
structure
of
YAG
phosphor
is
robustly
bonded
the
optical
thermal
performances
based
phosphor-converted
diodes
(pc-WLDs)
were
optimized
different
Al2O3
contents.
pc-WLD
achieves
maximum
threshold
25.2
W/mm2
luminous
flux
2138
lm
(luminance
1260
Mcd
$\cdot
\text{m}^{-{2}}{)}$
.
working
temperature
6%-Al2O3-PiG
only
88.4°C,
which
reduced
33.5%
compared
that
Al2O3-free-PiG.
small
device
has
high-luminance
light,
excellent
collimation,
long
illumination
distance,
promising
for
high-brightness
lighting.
