NPG Asia Materials,
Год журнала:
2021,
Номер
13(1)
Опубликована: Апрель 23, 2021
Abstract
Low-dimensional
perovskite
materials
and
their
derivatives
with
excellent
optical
performance
are
promising
candidates
for
light-emission
applications.
Herein,
centimeter
lead-halide
Cs
4
PbBr
6
single
crystals
(SCs),
which
have
been
used
radiation
detection
the
indirect
conversion
method,
were
synthesized
by
a
facile
solution
process.
The
scintillator
exhibits
bright
green
emission
peaking
at
525
nm
high
photoluminescence
quantum
yield
(up
to
86.7%)
under
375
laser
excitation.
SCs
exhibit
sensitivity
40
keV
X-rays,
favorable
linearity
X-ray
exposure
dose
rate,
limit
is
as
low
64.4
nGy
air
/s.
scintillation
time-response
of
was
acquired
time-correlated
single-photon
counting
system
alpha-particle
very
fast
time
response
(
τ
av
=
1.46
ns)
alpha
particles
from
241
Am
source.
This
value
comparable
that
commercial
plastic
EJ-228
1.31
much
faster
than
LYSO(Ce)
36.17
ns).
Conceptual
imaging
pulse
height
spectroscopy
experiments
also
performed.
These
results
demonstrated
potential
applications,
including
charged
particle
decay
sensitivity.
Chemical Reviews,
Год журнала:
2019,
Номер
119(5), С. 3296 - 3348
Опубликована: Фев. 13, 2019
Metal
halide
perovskites
represent
a
flourishing
area
of
research,
driven
by
both
their
potential
application
in
photo-voltaics
and
optoelectronics,
for
the
fundamental
science
underpinning
unique
optoelectronic
properties.
The
advent
colloidal
methods
synthesis
perovskite
nanocrystals
has
brought
to
attention
inter-esting
aspects
this
new
type
materials,
above
all
defect-tolerance.
This
review
aims
provide
an
updated
survey
fast-moving
field,
with
main
focus
on
synthesis.
We
examine
chemistry
ca-pability
different
synthetic
routes
control
shape,
size
optical
properties
resulting
nano-crystals.
also
up
date
overview
post-synthesis
transformations,
summarize
various
so-lution
processes
aimed
at
fabricating
perovskite-based
nanocomposites.
then
nanocrystals,
focusing
linear
properties,
effects
quantum
confinement
and,
then,
current
knowledge
exciton
binding
energies.
discuss
emergence
non-linear
phenomena
such
as
multiphoton
absorption,
biexcitons
carrier
multiplication.
At
last,
we
outlook
most
cogent
open
questions
possible
future
directions.
Chemical Society Reviews,
Год журнала:
2021,
Номер
50(4), С. 2626 - 2662
Опубликована: Янв. 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.
Inorganic Chemistry Frontiers,
Год журнала:
2019,
Номер
6(11), С. 2969 - 3011
Опубликована: Янв. 1, 2019
This
review
summarizes
previous
research
on
luminescent
perovskites,
including
oxides
and
halides,
with
different
structural
dimensionality.
The
relationship
between
the
crystal
structure,
electronic
structure
properties
is
discussed
in
detail.
Chemical Society Reviews,
Год журнала:
2021,
Номер
50(18), С. 10116 - 10211
Опубликована: Янв. 1, 2021
The
present
work
provides
a
critical
review
of
the
science
and
technological
state-of-the-art
defect
engineering
applied
to
oxide
perovskites
in
thermocatalytic,
electrocatalytic,
photocatalytic,
energy-storage
applications.
The
recent
re-emergence
of
halide
perovskites
has
received
escalating
interest
for
optoelectronic
applications.
In
addition
to
photovoltaics,
the
multifunctional
nature
led
diverse
ultralow
thermal
conductivity
coupled
with
decent
mobility
and
charge
carrier
tunability
prediction
as
a
possible
contender
future
thermoelectrics.
Herein,
advances
in
transport
their
potentials
challenges
thermoelectrics
are
reviewed.
An
overview
phonon
behavior
perovskites,
well
compositional
dependency
is
analyzed.
Understanding
knowing
value
crucial
creating
effective
heat
dissipation
schemes
determining
other
thermal-related
properties
like
thermo-optic
coefficients,
hot-carrier
cooling,
thermoelectric
efficiency.
Recent
works
on
perovskite-based
together
theoretical
predictions
viability
highlighted.
Also,
progress
modulating
using
light
chemical
doping
discussed.
Finally,
strategies
overcome
limiting
factors
perovskite
prospects
emphasized.
ACS Energy Letters,
Год журнала:
2019,
Номер
5(1), С. 87 - 99
Опубликована: Ноя. 22, 2019
Green-emitting
zero-dimensional
perovskite
Cs4PbBr6,
consisting
of
an
array
isolated
[PbBr6]4–
octahedra,
has
drawn
a
magnitude
interest
due
to
its
peculiar
yet
robust
photoluminescence
properties.
Given
many
advances
in
the
past
few
years,
true
nature
unusual
green
emission
from
wide-bandgap
Cs4PbBr6
remains
elusive.
Although
number
reviews
have
been
published
on
this
subject,
emerging
evidence
motivates
us
summarize
rapid
progress
about
debate,
whereby
critical
comments
were
made
either
rationalize
or
question
each
point
view.
This
Review
summarizes
latest
findings
PL
origins
covering
both
CsPbBr3
impurity
and
defect
theories.
Specifically,
chemical
defects,
including
Br
vacancies,
polybromide,
self-trapped
excitons,
interstitial
molecules,
is
discussed.
The
phase
transformation
between
particularly
stressed
because
it
brought
more
cloud
puzzle.
Finally,
we
discuss
potential
application
material
envisioned
several
future
directions
that
may
clarify
mechanism
PL.
Advanced Functional Materials,
Год журнала:
2021,
Номер
31(30)
Опубликована: Май 24, 2021
Abstract
Substantial
progress
has
been
made
in
blue
perovskite
light‐emitting
diodes
(PeLEDs).
In
this
review,
the
strategies
for
high‐performance
PeLEDs
are
described,
and
main
focus
is
on
optimization
of
optical
electrical
properties
perovskites.
detail,
fundamental
device
working
principles
first
elucidated,
followed
by
a
systematical
discussion
key
issues
achieving
high‐quality
nanocrystals
(NCs)
quasi‐2D
These
involve
ligand
metal
doping
enhancing
carrier
transport
reducing
traps
NCs,
as
well
phase
modulation
defect
passivation
improving
energy
transfer
emission
efficiency
The
efficient
3D
mixed‐halide
lead‐free
LEDs
then
briefly
introduced.
After
that,
other
strategies,
including
effective
charge
layer,
system,
architecture
high
light
outcoupling
efficiency,
further
discussed
to
boost
PeLED
performances.
Meanwhile,
testing
standard
lifetime
suggested
enable
direct
comparisons
operational
stability.
Finally,
challenges
future
directions
addressed.
The Journal of Physical Chemistry Letters,
Год журнала:
2018,
Номер
9(18), С. 5490 - 5495
Опубликована: Сен. 5, 2018
Zero-dimensional
(0D)
perovskites
have
recently
opened
a
new
frontier
in
device
engineering
for
light
conversion
technologies
due
to
their
unprecedented
high
photoluminescence
quantum
yield
as
solids.
Although
many
experimental
and
theoretical
efforts
been
made
understand
optical
behavior,
the
origin
of
green
emission
is
still
opaque.
Here,
we
develop
complete
picture
point
defects
Cs-Pb-Br
demonstrate
that
bromide
vacancies
(VBr)
prototype
0D
perovskite
Cs4PbBr6
low
formation
energy
relevant
defect
level
contribute
midgap
radiative
state.
Moreover,
state-of-the-art
characterizations
including
atomic-resolution
electron
imaging
not
only
confirm
purity
phase
Br-deficient
green-emissive
nanocrystals
(NCs)
but
also
exclude
presence
CsPbBr3
NCs
impurities.
Our
findings
provide
robust
evidence
defect-induced
luminescence
NCs,
which
helps
extend
scope
utility
these
bulk
materials
optoelectronic
applications.
