Advanced Optical Materials,
Journal Year:
2021,
Volume and Issue:
9(17)
Published: May 31, 2021
Abstract
The
high‐profile
candidacy
of
low‐dimensional
metal‐halide
single
crystals
as
promising
light
emitters
originates
from
the
intriguing
emission
properties
(e.g.,
extremely
broad
luminescence
spectra,
large
Stokes
shift,
high
color
rendition),
which
have
enabled
recent
great
achievements
on
their
application
in
lighting,
artificial
illumination,
and
scintillators.
Among
family
crystals,
zero‐dimensional
(0D)
materials
been
featured
lowest
dimensionality,
a
consequence,
strongest
quantum
confinement,
softest
lattice,
electron–phonon
coupling
further
translated
into
near‐unity
photoluminescence
(PL)
efficiency
with
broadband
emission.
However,
far
it
is
known,
0D
structures
are
significantly
underexplored.
Herein,
an
overview
provided
advances
focus
comprehensive
understanding
insightful
perspectives
behind
photophysical
mechanism.
Additionally,
challenges
future
opportunities
currently
faced
by
bulk
metal
halides
discussed
order
to
provide
roadmap
for
development
novel
versatile
optical
suited
practical
applications.
Chemical Society Reviews,
Journal Year:
2021,
Volume and Issue:
50(4), P. 2626 - 2662
Published: Jan. 1, 2021
This
review
provides
in-depth
insight
into
the
structure–luminescence–application
relationship
of
0D
all-inorganic/organic–inorganic
hybrid
metal
halide
luminescent
materials.
The Journal of Physical Chemistry Letters,
Journal Year:
2020,
Volume and Issue:
11(6), P. 2053 - 2061
Published: Feb. 27, 2020
Highly
efficient
blue-emitting
three-dimensional
(3D)
lead–free
halide
perovskites
with
excellent
stability
have
attracted
worldwide
attention.
Herein,
a
doping
route
was
adopted
to
incorporate
Sb3+
ions
into
the
Cs2NaInCl6
for
decorating
electronic
band
structure.
Due
moderate
electron–phonon
coupling,
Sb3+-doped
double
showed
narrow
and
relatively
unusual
blue
emission
of
self-trapped
excitons
(STEs).
Density
functional
theory
(DFT)
calculation
indicated
that
doped
could
break
parity-forbidden
transition
rule
modulate
density
state
(DOS)
population
effectively
boost
PLQY
STEs
drastically.
The
optimized
Sb3+:Cs2NaInCl6
exhibited
up
75.89%
under
consecutive
illumination
365
nm
UV
light
1000
h.
This
kind
highly
lead-free
may
overcome
bottlenecks
severe
toxicity
insufficient
therefore
an
extensive
application
in
scarce
photonic
optoelectronic
fields.
Advanced Energy Materials,
Journal Year:
2020,
Volume and Issue:
10(26)
Published: Feb. 12, 2020
Abstract
The
unprecedented
increase
of
the
power
conversion
efficiency
metal‐halide
perovskite
solar
cells
has
significantly
outpaced
understanding
their
fundamental
properties.
One
biggest
puzzles
perovskites
been
exciton
binding
energy,
which
proved
to
be
difficult
determine
experimentally.
Many
contradictory
reports
can
found
in
literature
with
values
energy
from
a
few
meV
tens
meV.
In
this
review
results
last
years
intense
investigation
physic
materials
are
summarized.
particular
critical
overview
different
experimental
approaches
used
is
provided.
problem
context
polar
nature
crystals
and
related
polaron
effects
have
neglected
date
most
work
discussed.
It
shown
that
reconcile
at
least
some
observations
controversy
present
literature.
Finally,
current
status
fine
structure
peculiar
carrier–phonon
coupling
help
understand
intriguing
light
emission
perovskites.
ACS Materials Letters,
Journal Year:
2020,
Volume and Issue:
2(9), P. 1218 - 1232
Published: Aug. 4, 2020
Low-dimensional
metal
halides
have
been
the
focus
of
intense
investigations
in
recent
years
following
success
hybrid
lead
halide
perovskites
as
optoelectronic
materials.
In
particular,
light
emission
low-dimensional
based
on
5s2
cations
Sn2+
and
Sb3+
has
found
utility
a
variety
applications
complementary
to
those
three-dimensional
because
its
unusual
properties
such
broadband
character
highly
temperature-dependent
lifetime.
These
derive
from
exceptional
chemistry
lone
pair,
but
terminology
explanations
given
for
vary
widely,
hampering
efforts
build
cohesive
understanding
these
materials
that
would
development
efficient
devices.
this
Perspective,
we
provide
structural
overview
with
dynamics
driven
by
stereoactivity
pair
identify
features
enable
strong
emission.
We
unite
different
theoretical
models
able
explain
bright
centers
into
framework,
which
is
then
applied
array
compounds
recently
developed
our
group
other
researchers,
demonstrating
generating
holistic
picture
field
point
view
chemist.
highlight
state-of-the-art
demonstrate
unique
capabilities
versatile
emissive
promising
future
directions
halides.
Advanced Functional Materials,
Journal Year:
2021,
Volume and Issue:
31(40)
Published: July 10, 2021
Abstract
Luminescent
metal
halide
materials
with
flexible
crystallography/electronic
structures
and
tunable
emission
have
demonstrated
broad
application
prospects
in
the
visible
light
region.
However,
designing
near‐infrared
(NIR)
light‐emitting
halides
remains
a
challenge.
Here,
an
enlightening
prototype
is
proposed
to
explore
high‐efficiency
broadband
NIR
systems
by
incorporating
Sb
3+
into
Cs
2
ZnCl
4
matrix.
Combined
experimental
analysis
density
functional
theory
calculations
reveal
modified
self‐trapped
excitons
model
elaborate
emission.
The
high
photoluminescence
quantum
yield
of
69.9%
peaking
at
745
nm
large
full
width
half
maximum
175
nm,
along
excellent
air/thermal
stability,
show
unique
advantages
lead‐free
:Sb
as
source.
substitution
Cl
−
Br
further
enables
red‐shift
peak
from
823
nm.
diode
device
based
on
demonstrates
potential
non‐visible
source
night
vision.
This
study
puts
forward
effective
strategy
design
novel
eco‐friendly
emissive
provides
guidance
for
expanding
scope
luminescent
halides.
Chemistry of Materials,
Journal Year:
2020,
Volume and Issue:
32(12), P. 5327 - 5334
Published: May 15, 2020
Rational
doping
and
compositional
control
remain
significant
challenges
in
designing
luminescent
metal
halides
to
achieve
highly
efficient
tunable
emission.
Here,
the
air-stable
lead-free
Cs2InCl5·H2O
crystal
with
a
zero-dimensional
structure
was
investigated
as
pristine
compound
design
new
luminescence
materials.
Sb3+-doping
Cs2InCl5·H2O:Sb3+
enabled
broadband
yellow
emission
photoluminescence
quantum
yield
up
95.5%.
The
colors
can
be
expanded
into
orange-red
region
by
halogen
substitution
for
Cs2InX5·H2O:Sb3+
(X
=
Cl/Br/I).
optical
characterizations
along
theoretical
calculations
demonstrate
that
characteristic
singlet
triplet
self-trapped
exciton
emissions
of
ns2-metal-halide
centers
account
luminescence.
Moreover,
admirable
stability
against
air
heat
pave
way
its
further
applications
white
light-emitting
diodes
high-resolution
fluorescent
signs
anticounterfeiting
technology.
Our
achievement
case
Sb3+-doped
represents
successful
strategy
developing
stable
versatile
applications.
Advanced Science,
Journal Year:
2021,
Volume and Issue:
8(24)
Published: Oct. 24, 2021
0D
perovskites
have
gained
much
attention
in
recent
years
due
to
their
fascinating
properties
derived
from
peculiar
structure
with
isolated
metal
halide
octahedra
or
clusters.
However,
the
systematic
discussion
on
crystal
and
electronic
of
further
understand
photophysical
characteristics
comprehensive
overview
for
applications
are
still
lacking.
In
this
review,
unique
diverse
comprehensively
analyzed,
including
large
bandgaps,
high
exciton
binding
energy,
largely
Stokes-shifted
broadband
emissions
self-trapped
excitons.
Furthermore,
photoluminescence
regulation
discussed.
Then,
various
synthetic
methods
perovskite
single
crystals,
nanocrystals,
thin
films
summarized.
Finally,
emerging
light-emitting
diodes,
solar
cells,
detectors,
some
others
illustrated,
outlook
future
research
field
is
also
provided.
Advanced Science,
Journal Year:
2021,
Volume and Issue:
8(4)
Published: Jan. 4, 2021
Abstract
Lead‐based
halide
perovskites
have
received
great
attention
in
light‐emitting
applications
due
to
their
excellent
properties,
including
high
photoluminescence
quantum
yield
(PLQY),
tunable
emission
wavelength,
and
facile
solution
preparation.
In
spite
of
characteristics,
the
presence
toxic
element
lead
directly
obstructs
further
commercial
development.
Hence,
exploiting
lead‐free
perovskite
materials
with
superior
properties
is
urgent
necessary.
this
review,
deep‐seated
reasons
that
benefit
light
for
perovskites,
which
help
develop
performance,
are
first
emphasized.
Recent
advances
(single
crystals,
thin
films,
nanocrystals
different
dimensionalities)
from
synthesis,
crystal
structures,
optical
optoelectronic
then
systematically
summarized.
particular,
phosphor‐converted
LEDs
electroluminescent
using
fully
examined.
Ultimately,
based
on
current
development
future
directions
terms
devices
discussed.