ChemSusChem,
Journal Year:
2023,
Volume and Issue:
17(7)
Published: Dec. 12, 2023
Tailoring
bandgap
by
mixed-halide
strategy
in
perovskites
has
attracted
extraordinary
attention
due
to
the
flexibility
of
halide
ion
combinations
and
emerged
as
most
direct
effective
approach
precisely
tune
emission
wavelength
throughout
entire
visible
light
spectrum.
Mixed-halide
perovskites,
yet,
still
suffered
from
several
problems,
particularly
phase
segregation
under
external
stimuli
because
ions
migration.
Understanding
essential
cause
finding
sound
strategies,
thus,
remains
a
challenge
for
stable
efficient
perovskite
light-emitting
diodes
(PeLEDs).
The
review
herein
presents
an
overview
diverse
application
scenarios
profound
significance
associated
with
perovskites.
We
then
summarize
challenges
potential
research
directions
toward
developing
high
PeLEDs.
thus
provides
systematic
timely
summary
community
deepen
understanding
materials
resulting
Nano Letters,
Journal Year:
2024,
Volume and Issue:
24(12), P. 3719 - 3726
Published: March 14, 2024
Mixed-halide
CsPb(Br/I)3
perovskite
quantum
dots
(QDs)
are
regarded
as
one
of
the
most
promising
candidates
for
pure-red
light-emitting
diodes
(PeLEDs)
due
to
their
precise
spectral
tuning
property.
However,
lead-rich
surface
these
QDs
usually
results
in
halide
ion
migration
and
nonradiative
recombination
loss,
which
remains
a
great
challenge
high-performance
PeLEDs.
To
solve
above
issues,
we
employ
chelating
agent
1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic
acid
hydrate
(DOTA)
polish
meanwhile
introduce
new
ligand
2,3-dimercaptosuccinic
(DMSA)
passivate
defects
QDs.
This
synchronous
post-treatment
strategy
high-quality
with
suppressed
an
improved
photoluminescence
yield,
enables
us
fabricate
spectrally
stable
PeLEDs
peak
external
efficiency
23.2%,
representing
best
performance
based
on
mixed-halide
reported
date.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(27)
Published: March 3, 2024
Abstract
Structuring
metal
halide
perovskites
with
mixed
anions
is
a
promising
strategy
for
attaining
the
desired
bandgap
and
emission
color
technological
applications
such
as
electroluminescent
(EL)
light‐emitting
diodes
(LEDs)
ultrahigh‐definition
displays.
However,
these
suffer
from
severe
EL
spectral
stability
issues.
During
device
operation,
homogeneously
perovskite
phases
are
prone
to
form
halide‐segregated
domain
spatially
inhomogeneous
color,
which
hinders
practical
use
of
LEDs
(PeLEDs).
In
this
review,
comprehensive
survey
performed
about
underlying
driving
forces
phase
segregation,
representative
strategies
discussed
development
color/spectral
stable
PeLEDs.
Finally,
future
directions
prospects
outlined
regarding
further
enhancement
Dalton Transactions,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Metal
halide
perovskite
single
crystals
(MHPSCs)
are
highly
promising
materials
for
optoelectronic
applications,
but
their
stability
is
hindered
by
ion
migration,
thereby
impacting
performance.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 9, 2025
Developing
strategies
to
manage
ion-migration-induced
phase
segregation
in
wide-bandgap
(WBG)
perovskites
is
crucial
for
achieving
high-performance
perovskite-silicon
tandem
solar
cells
(TSCs).
However,
maintaining
continuous
suppression
of
from
the
film
crystallization
process
device
operation
remains
a
significant
challenge.
The
present
study
demonstrates
an
efficient
strategy
activating
halogen
circulation
WBG
perovskite
by
using
agents
(HCA)
N-halosuccinimide
molecules
as
sustainable
stabilizers,
order
achieve
dynamic
equilibrium
within
precursor
solution
and
film,
which
blocks
migration
path
Br-/I-
ions
both
aging
perovskites.
Attempts
on
situ
monitoring
halide
visually
verified
enhanced
stability
activated
films
devices.
Consequently,
work
achieves
champion
efficiency
up
23.25%
with
low
Voc
loss
0.39
V
1.67-eV-bandgap
device,
HCA-based
devices
can
maintain
88%
93%
their
initial
efficiencies
over
1000
h
under
illumination
2500
at
85
°C
N2
atmosphere,
respectively.
As
proof
concept,
perovskite/silicon
monolithic
TSCs
are
fabricated
demonstrate
high
1.99
power
conversion
33.2%.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(33)
Published: June 12, 2024
Self-assembled
monolayers
(SAMs)
as
the
hole-selective
contact
have
achieved
remarkable
success
in
iodine-based
perovskite
solar
cells
(PSCs),
while
their
impact
on
bromine-based
PSCs
is
limited
due
to
poor
crystallization
behavior
and
mismatched
energy
level
alignment.
Here,
a
highly
efficient
SAM
of
(2-(3,6-diiodo-9H-carbazol-9-yl)ethyl)phosphonic
acid
(I-2PACz)
employed
address
these
challenges
FAPbBr
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 30, 2024
Abstract
2D
hybrid
perovskites,
with
their
high
X‐ray
absorption
and
extended
carrier
transport,
present
excellent
promise
for
efficient
direct
detection.
However,
most
of
the
current
devices
require
external
bias
voltage,
which
results
in
need
significant
energy
consumption
severe
ion
migration,
therefore,
it
is
urgent
to
develop
new
types
materials
achieving
passive
Herein,
two
novel
chiral
polar
alternating
cations
intercalation
(ACI)‐type
perovskite
materials,
named
(
R
/
S
‐PPA)(IEA)PbBr
4
1‐
,
)‐PPA
=
‐1‐phenylpropylamine;
IEA
iodoethylamine),
are
constructed
by
integrating
aromatic
spacer
‐PPA
iodine‐substituted
IEA.
Various
intermolecular
interactions,
such
as
I···I,
C─H···I,
π···π
introduced
due
introduction
I‐substituted
chain
amines,
effectively
suppresses
migration
thus
lead
improved
operational
stability.
The
device
along
axis
displays
superior
detection
performance,
relatively
sensitivity
an
ultra‐low
limit
(LoD)
3.0
nGy
s
−1
making
first
ACI‐type
material
realizing
Furthermore,
also
presents
low
dark
drift
exceptional
irradiation
This
work
provides
thought
using
high‐performance
