ACS Energy Letters,
Journal Year:
2019,
Volume and Issue:
4(11), P. 2571 - 2578
Published: Oct. 1, 2019
We
developed
lead
halide
perovskite
quantum
dot
(QD)
solar
cells
with
a
combinational
absorbing
layer
based
on
stacked
α-CsPbI3
and
FAPbI3.
QDs,
relatively
wide
bandgap
of
1.75
eV,
are
not
ideal
for
single-junction
cells.
show
that
the
absorption
can
be
broadened
by
introduction
another
QD
narrower
like
The
α-CsPbI3/FAPbI3
structure
together
thermal
annealing
improve
electrical
coupling
in
FAPbI3
induce
A-site
cation
exchange
to
develop
graded
heterojunction
more
efficient
charge
extraction.
A
highest
power
conversion
efficiency
15.6%
improved
ambient
stability
have
been
achieved
bilayer
structured
More
interestingly,
QDs
provided
facile
way
fabricate
multiple
layers
junctions
optoelectronic
applications
via
layer-by-layer
deposition,
which
cannot
realized
solution-processed
thin-film
devices.
ACS Nano,
Journal Year:
2021,
Volume and Issue:
15(7), P. 10775 - 10981
Published: June 17, 2021
Metal-halide
perovskites
have
rapidly
emerged
as
one
of
the
most
promising
materials
21st
century,
with
many
exciting
properties
and
great
potential
for
a
broad
range
applications,
from
photovoltaics
to
optoelectronics
photocatalysis.
The
ease
which
metal-halide
can
be
synthesized
in
form
brightly
luminescent
colloidal
nanocrystals,
well
their
tunable
intriguing
optical
electronic
properties,
has
attracted
researchers
different
disciplines
science
technology.
In
last
few
years,
there
been
significant
progress
shape-controlled
synthesis
perovskite
nanocrystals
understanding
applications.
this
comprehensive
review,
having
expertise
fields
(chemistry,
physics,
device
engineering)
joined
together
provide
state
art
overview
future
prospects
nanocrystal
research.
ACS Energy Letters,
Journal Year:
2021,
Volume and Issue:
6(2), P. 739 - 768
Published: Jan. 29, 2021
Radiation
detection,
using
materials
to
convert
high-energy
photons
low-energy
(X-ray
imaging)
or
electrical
charges
detector),
has
become
essential
for
a
wide
range
of
applications
including
medical
diagnostic
technologies,
computed
tomography,
quality
inspection
and
security,
etc.
Metal
halide
perovskite-based
high-resolution
scintillation-imaging
screens
direct
conversion
detectors
are
promising
candidates
such
applications,
because
they
have
high
absorption
cross
sections
X-rays
due
their
heavy
atom
(e.g.,
Pb2+,
Bi3+,
I–)
compositions;
moreover,
these
solution-processable
at
low
temperature,
possessing
tunable
bandgaps,
near-unity
photoluminescence
quantum
yields,
trap
density,
charge
carrier
mobility,
fast
photoresponse.
In
this
review,
we
explore
decipher
the
working
mechanism
scintillators
as
well
key
advantages
perovskites
both
detection
approaches.
We
further
discuss
recent
advancements
in
research
area,
pointing
out
remaining
challenges
our
perspective
future
directions
toward
X-ray
applications.
Micro-light-emitting
diodes
(μ-LEDs)
are
regarded
as
the
cornerstone
of
next-generation
display
technology
to
meet
personalised
demands
advanced
applications,
such
mobile
phones,
wearable
watches,
virtual/augmented
reality,
micro-projectors
and
ultrahigh-definition
TVs.
However,
LED
chip
size
shrinks
below
20
μm,
conventional
phosphor
colour
conversion
cannot
present
sufficient
luminance
yield
support
high-resolution
displays
due
low
absorption
cross-section.
The
emergence
quantum
dot
(QD)
materials
is
expected
fill
this
gap
their
remarkable
photoluminescence,
narrow
bandwidth
emission,
tuneability,
high
nanoscale
size,
providing
a
powerful
full-colour
solution
for
μ-LED
displays.
Here,
we
comprehensively
review
latest
progress
concerning
implementation
μ-LEDs
QDs
in
technology,
including
design
fabrication,
large-scale
transfer
QD
strategy.
Outlooks
on
stability,
patterning
deposition
challenges
also
provided.
Finally,
discuss
applications
QD-based
displays,
showing
bright
future
technology.
ACS Nano,
Journal Year:
2020,
Volume and Issue:
14(11), P. 14417 - 14492
Published: Oct. 20, 2020
Counterfeiting
and
inverse
engineering
of
security
confidential
documents,
such
as
banknotes,
passports,
national
cards,
certificates,
valuable
products,
has
significantly
been
increased,
which
is
a
major
challenge
for
governments,
companies,
customers.
From
recent
global
reports
published
in
2017,
the
counterfeiting
market
was
evaluated
to
be
$107.26
billion
2016
forecasted
reach
$206.57
by
2021
at
compound
annual
growth
rate
14.0%.
Development
anticounterfeiting
authentication
technologies
with
multilevel
securities
powerful
solution
overcome
this
challenge.
Stimuli-chromic
(photochromic,
hydrochromic,
thermochromic)
photoluminescent
(fluorescent
phosphorescent)
compounds
are
most
significant
applicable
materials
development
complex
inks
high-security
level
fast
authentication.
Highly
efficient
have
developed
high
efficiency.
Applicable
applications
generally
based
on
photochromic
compounds,
hydrochromic
thermochromic
extensively
used
decades.
A
wide
range
materials,
organic
inorganic
metal
complexes,
polymer
nanoparticles,
quantum
dots,
carbon
upconverting
supramolecular
structures,
could
display
all
these
phenomena
depending
their
physical
chemical
characteristics.
The
polymeric
recently
received
attention
because
stability
printing
documents.
In
addition,
including
hand-writing,
stamping,
inkjet
printing,
screen
labels
discussed
introduction
methods
application
different
inks.
This
review
would
help
scientists
design
develop
encryption,
authentication,
security,
detection,
potential
marking
information
encryption
various
substrates.
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.
Journal of the American Chemical Society,
Journal Year:
2019,
Volume and Issue:
141(25), P. 9764 - 9768
Published: June 17, 2019
Low-dimensional
metal
halides
have
been
researched
as
optoelectronic
materials
for
the
past
two
decades.
Zero-dimensional
of
ns2
elements
(Sn,
Pb,
Sb)
recently
gained
attention
highly
efficient
broadband
light
emitters.
These
compounds
comprise
discrete
halide
centers,
isolated
by
bulky
organic
cations.
Herein,
we
report
isostructural
complexes
Ge(II),
Sn(II),
and
Pb(II)
with
a
1-butyl-1-methyl-piperidinium
cation
(Bmpip),
featuring
unusual
disphenoidal
coordination
stereoactive
lone
pair.
Spectrally
broad,
bright
emission
from
localized
excitons,
quantum
efficiencies
up
to
75%,
is
observed
in
blue
red
spectral
regions
bromides
(for
Sn,
Ge,
respectively)
extends
into
near-infrared
Bmpip2SnI4
(peak
at
730
nm).
In
case
Sn(II)
both
singlet
triplet
excitonic
bands
observed.
Furthermore,
Bmpip2SnBr4
Bmpip2PbBr4
exhibit
X-ray-excited
luminescence
(radioluminescence)
brightness
being
commensurate
that
commercial
inorganic
X-ray
scintillator
(NaI:Tl).
Angewandte Chemie International Edition,
Journal Year:
2019,
Volume and Issue:
59(3), P. 1030 - 1046
Published: May 14, 2019
In
recent
years,
there
have
been
rapid
advances
in
the
synthesis
of
lead
halide
perovskite
nanocrystals
(NCs)
for
use
solar
cells,
light
emitting
diodes,
lasers,
and
photodetectors.
These
compounds
a
set
intriguing
optical,
excitonic,
charge
transport
properties,
including
outstanding
photoluminescence
quantum
yield
(PLQY)
tunable
optical
band
gap.
However,
necessary
inclusion
lead,
toxic
element,
raises
critical
concern
future
commercial
development.
To
address
toxicity
issue,
intense
research
effort
has
devoted
to
developing
lead-free
(LFHP)
NCs.
this
Review,
we
present
comprehensive
overview
currently
explored
LFHP
NCs
with
an
emphasis
on
their
crystal
structures,
synthesis,
environmental
stabilities
(e.g.,
UV,
heat,
moisture
resistance).
addition,
strategies
enhancing
properties
as
well
state-of-the-art
applications
are
discussed.
With
perspective
current
challenges,
provide
outlook
directions
rapidly
evolving
field
achieve
high-quality
broader
range
fundamental
practical
applications.
