Journal of Physics Photonics,
Journal Year:
2023,
Volume and Issue:
5(4), P. 042502 - 042502
Published: Sept. 13, 2023
Abstract
Micro
light-emitting
diode
(micro-LED)
will
play
an
important
role
in
the
future
generation
of
smart
displays.
They
are
found
very
attractive
many
applications,
such
as
maskless
lithography,
biosensor,
augmented
reality
(AR)/mixed
etc,
at
same
time.
A
monitor
that
can
fulfill
saturated
color
rendering,
high
display
resolution,
and
fast
response
time
is
highly
desirable,
micro-LED-based
technology
could
be
our
best
chance
to
meet
these
requirements.
At
present,
semiconductor-based
red,
green
blue
micro-LED
chips
color-conversion
enhanced
micro-LEDs
major
contenders
for
full-color
high-resolution
Both
technologies
need
revolutionary
ways
perfect
material
qualities,
fabricate
device,
assemble
individual
parts
into
a
system.
In
this
roadmap,
we
highlight
current
status
challenges
micro-LED-related
issues
discuss
possible
advances
science
stand
up
challenges.
The
innovation
epitaxy,
tunnel
junction,
direct
epitaxy
nitride-based
quantum
wells
red
ultraviolet,
provide
critical
solutions
performance
various
aspects.
scale
structure,
like
nanowires
or
nanorods,
crucial
scaling
devices.
Meanwhile,
conversion
method,
which
uses
colloidal
dot
active
material,
hassle-free
way
large
array
emphasis
demonstration
via
dot.
These
dots
patterned
by
porous
inkjet,
photo-sensitive
resin.
addition
devices,
peripheral
components
equally
important.
Microchip
transfer
repair,
heterogeneous
integration
with
electronics,
novel
2D
cannot
ignored,
overall
module
power-consuming.
AR
one
potential
customers
displays,
user
experience
so
far
limited
due
lack
truly
qualified
display.
Our
analysis
showed
on
addressing
solving
problems,
loss
optical
coupling
narrow
field
view.
All
efforts
channeled
achieve
efficient
all
ideal
qualities
most
stringent
viewing
requirements,
expect
it
become
indispensable
part
daily
life.
Abstract
With
rapid
advances
in
high-speed
communication
and
computation,
augmented
reality
(AR)
virtual
(VR)
are
emerging
as
next-generation
display
platforms
for
deeper
human-digital
interactions.
Nonetheless,
to
simultaneously
match
the
exceptional
performance
of
human
vision
keep
near-eye
module
compact
lightweight
imposes
unprecedented
challenges
on
optical
engineering.
Fortunately,
recent
progress
holographic
elements
(HOEs)
lithography-enabled
devices
provide
innovative
ways
tackle
these
obstacles
AR
VR
that
otherwise
difficult
with
traditional
optics.
In
this
review,
we
begin
introducing
basic
structures
headsets,
then
describing
operation
principles
various
HOEs
devices.
Their
properties
analyzed
detail,
including
strong
selectivity
wavelength
incident
angle,
multiplexing
ability
volume
HOEs,
polarization
dependency
active
switching
liquid
crystal
device
fabrication,
micro-LEDs
(light-emitting
diodes),
large
design
freedoms
metasurfaces.
Afterwards,
discuss
how
help
enhance
performance,
detailed
description
analysis
some
state-of-the-art
architectures.
Finally,
cast
a
perspective
potential
developments
research
directions
photonic
future
displays.
Advanced Materials,
Journal Year:
2020,
Volume and Issue:
33(7)
Published: Dec. 21, 2020
Abstract
Metal
halide
perovskites
(MHPs)
have
been
a
hot
research
topic
due
to
their
facile
synthesis,
excellent
optical
and
optoelectronic
properties,
record‐breaking
efficiency
of
corresponding
devices.
Nowadays,
the
development
miniaturized
high‐performance
photodetectors
(PDs)
has
fueling
demand
for
novel
photoactive
materials,
among
which
low‐dimensional
MHPs
attracted
burgeoning
interest.
In
this
report,
photodetection
performance,
stability
MHPs,
including
0D,
1D,
2D
layered
nonlayered
nanostructures,
as
well
heterostructures
are
reviewed.
Recent
advances
in
synthesis
approaches
summarized
key
concepts
understanding
properties
related
PD
applications
introduced.
More
importantly,
recent
progress
PDs
based
on
is
presented,
strategies
improving
performance
perovskite
highlighted.
By
discussing
advances,
strategies,
existing
challenges,
report
provides
perspectives
MHP‐based
future.
ACS Nano,
Journal Year:
2021,
Volume and Issue:
15(4), P. 6192 - 6210
Published: April 8, 2021
This
review
traces
nanocrystal
quantum
dot
(QD)
research
from
the
early
discoveries
to
present
day
and
into
future.
We
describe
extensive
body
of
theoretical
experimental
knowledge
that
comprises
modern
science
QDs.
Indeed,
spatial
confinement
electrons,
holes,
excitons
in
nanocrystals,
coupled
with
ability
chemical
synthesis
make
complex
designed
structures,
is
today
enabling
multiple
applications
QD
size-tunable
electronic
optical
properties.
Science,
Journal Year:
2022,
Volume and Issue:
375(6578), P. 307 - 310
Published: Jan. 20, 2022
Material
composition
engineering
and
device
fabrication
of
perovskite
nanocrystals
(PNCs)
in
solution
can
introduce
organic
contamination
entail
several
synthetic,
processing,
stabilization
steps.
We
report
three-dimensional
(3D)
direct
lithography
PNCs
with
tunable
bandgap
glass.
The
halide
ion
distribution
was
controlled
at
the
nanoscale
ultrafast
laser-induced
liquid
nanophase
separation.
exhibit
notable
stability
against
ultraviolet
irradiation,
solution,
high
temperatures
(up
to
250°C).
Printed
3D
structures
glass
were
used
for
optical
storage,
micro-light
emitting
diodes,
holographic
displays.
proposed
mechanisms
both
PNC
formation
tunability
verified.
Liquid
crystal
displays
(LCDs)
and
photonic
devices
play
a
pivotal
role
to
augmented
reality
(AR)
virtual
(VR).
The
recently
emerging
high-dynamic-range
(HDR)
mini-LED
backlit
LCDs
significantly
boost
the
image
quality
brightness
reduce
power
consumption
for
VR
displays.
Such
light
engine
is
particularly
attractive
compensating
optical
loss
of
pancake
structure
achieve
compact
lightweight
headsets.
On
other
hand,
high-resolution-density,
high-brightness
liquid-crystal-on-silicon
(LCoS)
promising
source
see-through
AR
displays,
especially
under
high
ambient
lighting
conditions.
Meanwhile,
high-speed
LCoS
spatial
modulators
open
new
door
holographic
focal
surface
Finally,
ultrathin
planar
diffractive
LC
elements,
such
as
geometric
phase
grating
lens,
have
found
useful
applications
in
enhancing
resolution,
widening
field-of-view,
suppressing
chromatic
aberrations,
creating
multiplanes
overcome
vergence-accommodation
conflict,
dynamic
pupil
steering
gaze-matched
Maxwellian
just
name
few.
operation
principles,
potential
applications,
future
challenges
these
advanced
will
be
discussed.
Chemical Reviews,
Journal Year:
2023,
Volume and Issue:
123(8), P. 4663 - 4692
Published: Feb. 16, 2023
Quantum
dot
light-emitting
diodes
(QD-LEDs)
are
one
of
the
most
promising
self-emissive
displays
in
terms
efficiency,
wavelength
tunability,
and
cost.
Future
applications
using
QD-LEDs
can
cover
a
range
from
wide
color
gamut
large
panel
to
augmented/virtual
reality
displays,
wearable/flexible
automotive
transparent
which
demand
extreme
performance
contrast
ratio,
viewing
angle,
response
time,
power
consumption.
The
efficiency
lifetime
have
been
improved
by
tailoring
QD
structures
optimizing
charge
balance
transport
layers,
resulting
theoretical
for
unit
devices.
Currently,
longevity
inkjet-printing
fabrication
being
tested
future
commercialization.
In
this
Review,
we
summarize
significant
progress
development
describe
their
potential
compared
other
displays.
Furthermore,
critical
elements
determine
QD-LEDs,
such
as
emitters,
hole/electron
device
structures,
discussed
comprehensively,
degradation
mechanisms
devices
issues
process
were
also
investigated.
Journal of the Society for Information Display,
Journal Year:
2021,
Volume and Issue:
29(6), P. 446 - 465
Published: May 24, 2021
Abstract
Recently,
“liquid
crystal
display
(LCD),
organic
light‐emitting
diode
(OLED),
or
micro‐light‐emitting
(LED):
who
wins?”
is
a
heated
debatable
question.
In
this
review
article,
we
provide
comprehensive
overview
of
these
three
promising
technologies
through
nine
performance
indicators,
including
ambient
contrast
ratio,
motion
picture
response
time,
viewing
angle
and
angular
color
shift,
gamut,
resolution
density,
power
consumption,
cost,
lifetime,
thin
profile
panel
flexibility.
The
advantages
disadvantages
each
technology
are
analyzed,
their
future
perspectives
discussed.
Advanced Science,
Journal Year:
2021,
Volume and Issue:
8(14)
Published: May 24, 2021
Photodetectors
built
from
conventional
bulk
materials
such
as
silicon,
III-V
or
II-VI
compound
semiconductors
are
one
of
the
most
ubiquitous
types
technology
in
use
today.
The
past
decade
has
witnessed
a
dramatic
increase
interest
emerging
photodetectors
based
on
perovskite
driven
by
growing
demands
for
uncooled,
low-cost,
lightweight,
and
even
flexible
photodetection
technology.
Though
good
electrical
optical
properties,
perovskite-based
always
suffer
nonideal
quantum
efficiency
high-power
consumption.
Joint
manipulation
electrons
photons
is
promising
strategy
to
improve
detection
efficiency.
In
this
review,
characteristics
typical
first
summarized.
Electrical
manipulations
discussed.
Then,
artificial
photonic
nanostructures
photon
detailed
light
absorption
By
reviewing
photodetectors,
review
aims
provide
strategies
achieve
high-performance
photodetectors.
ACS Energy Letters,
Journal Year:
2020,
Volume and Issue:
5(11), P. 3374 - 3396
Published: Oct. 12, 2020
Lead
halide
perovskite
quantum
dots
(LHP
QDs)
exhibit
great
potential
in
the
backlighting
display
of
light-emitting
diode
applications.
Light-emitting
with
high
brightness,
low
cost,
and
wide
color
gamut
can
be
achieved
based
on
LHP
QDs,
which
have
advantages
luminescence
performance,
tunable
emission,
facile
synthesis.
However,
some
drawbacks,
including
instability
large-scale
synthesis,
that
restrict
practical
application
QDs
remain.
This
Review
focuses
solutions
to
these
obstacles.
The
gap
between
fundamental
knowledge
applications
must
narrowed.
strategies
for
stability
improvements
scalable
synthesis
are
summarized
clarified.
provides
inspiration
optimization
promotes
their
backlighting,
contributes
current
future
solutions.
Advanced Materials,
Journal Year:
2021,
Volume and Issue:
33(23)
Published: May 3, 2021
Abstract
Organic–inorganic
mixed
halide
perovskites
have
emerged
as
an
excellent
class
of
materials
with
a
unique
combination
optoelectronic
properties,
suitable
for
plethora
applications
ranging
from
solar
cells
to
light‐emitting
diodes
and
photoelectrochemical
devices.
Recent
works
showcased
hybrid
electronic
through
improvements
in
design,
processing,
device
stability.
Herein,
comprehensive
up‐to‐date
review
is
presented
on
perovskite
electronics
focus
transistors
memories.
These
are
supported
by
the
fundamental
material
properties
semiconductors
such
tunable
bandgap,
ambipolar
charge
transport,
reasonable
mobility,
defect
characteristics,
solution
processability,
which
highlighted
first.
Then,
recent
progresses
perovskite‐based
reviewed,
covering
aspects
fabrication
process,
patterning
techniques,
contact
engineering,
2D
versus
3D
selection,
performance.
Furthermore,
nonvolatile
memories
artificial
synaptic
devices
presented.
The
ambient
instability
strategies
tackle
this
bottleneck
also
discussed.
Finally,
outlook
opportunities
develop
competitive
feasible
technology
highlighted.