Optics Letters,
Journal Year:
2024,
Volume and Issue:
49(20), P. 5933 - 5933
Published: Sept. 30, 2024
Ceramic
phosphors
have
high
thermal
conductivity
and
stability,
showing
great
potential
for
use
in
laser
lighting.
However,
it
is
difficult
to
further
improve
the
forward
efficiency
transmissive
mode
because
of
arbitrarily
emitting
ceramic
light
loss
by
secondary
optical
components.
Here,
an
effective
design
rod-shaped
LuAG:Ce
transparent
ceramics
was
proposed,
silicone
encapsulated
ceramic-based
devices
could
operate
stably
under
3.5
W
excitation,
possessing
a
luminous
150–180
lm/W,
far
exceeding
level
existing
commercial
mode.
Besides,
gradual
absorption
blue
gradient
distribution
heat,
bear
power
density
46
W/mm
2
without
saturation,
thermal-induced
degradation
only
accounted
7%
15
min
operation.
The
lighting
sources
with
low
divergence
angle
(∼4°)
uniform
spatial
were
obtained.
Our
optimized
rod
encapsulation
scheme
provided
solution
Advanced Materials Technologies,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 20, 2025
Abstract
Laser
lighting
is
considered
as
a
next‐generation
solid‐state
(SSL)
source
due
to
its
advantages
of
high‐power
density
and
brightness,
high
collimation,
long
irradiation
distance,
free
“efficiency
droop.”
Laser‐excited
phosphor,
in
which
blue
laser
diodes
(LDs)
excite
yellow
phosphor
converter,
common
method
realize
white
lighting.
As
novel
all‐inorganic
converter
material
with
easy
preparation,
low
cost,
adjustable
luminescent
property,
ability
combine
heat‐conducting
substrate,
the
phosphor‐in‐glass
film
(PiGF)
attracts
lot
attention.
In
this
perspective,
state‐of‐art
research
data
on
PiGFs
are
summarized,
preparation
constitution
PiGF
introduced.
The
topics
about
how
improve
luminescence
saturation
threshold
(ST),
light
extraction,
color
uniformity,
rendering
discussed.
Correspondingly,
applications
display,
biomedical
devices,
visible
communications
outlined.
Moreover,
prospects
future
directions
laser‐driven
indicated.
This
work
will
promote
study
high‐performance
applications.
