Trap
state
engineering
has
been
widely
employed
to
manipulate
the
dynamics
of
ion
migration
in
metal
halide
perovskites
(MHPs),
a
crucial
factor
associated
with
performance
and
stability
MHP-based
devices.
However,
specific
roles
different
trap
states
remain
poorly
understood
due
their
complicated
spatial
energetics
distributions.
Herein,
we
propose
methodology
for
independently
regulating
distributions
bulk
shallow
surface
deep
MHPs.
By
combining
situ
photoluminescence
spectroscopy
wide-field
imaging
microscopy,
elucidate
effect
on
promoting
long-range
interparticle
migration.
Interestingly,
ascertain
time-resolved
photoelectric
techniques
that
majority
mobile
ionic
defects
involved
are
predominantly
contributed
by
states.
Our
findings
suggest
targeted
manipulation
can
be
effective
reducing
number
ions
decelerating
rate
migration,
respectively.
Advanced Materials,
Год журнала:
2024,
Номер
36(25)
Опубликована: Март 11, 2024
Abstract
All–inorganic
perovskite
solar
cells
(PSCs),
such
as
CsPbX
3
,
have
garnered
considerable
attention
recently,
they
exhibit
superior
thermodynamic
and
optoelectronic
stabilities
compared
to
the
organic–inorganic
hybrid
PSCs.
However,
power
conversion
efficiency
(PCE)
of
PSCs
is
generally
lower
than
that
PSCs,
contain
higher
defect
densities
at
interface
within
light‐absorbing
layers,
resulting
in
non‐radiative
recombination
voltage
loss.
Consequently,
regulation
has
been
adopted
an
important
strategy
improve
device
performance
stability.
This
review
aims
comprehensively
summarize
recent
progresses
on
well
their
cutting‐edge
applications
extreme
scenarios.
The
underlying
fundamental
mechanisms
leading
formation
crystal
structure
are
firstly
discussed,
overview
literature‐adopted
strategies
context
interface,
internal,
surface
engineering
provided.
Cutting‐edge
environments
outer
space
underwater
situations
highlighted.
Finally,
a
summary
outlook
presented
future
directions
for
achieving
efficiencies
stability
Abstract
The
defects
in
perovskite
film
can
cause
charge
carrier
trapping
which
shortens
lifetime
and
diffusion
length.
So
passivation
has
become
promising
for
the
studies.
However,
how
disturb
transport
passivating
affects
CsPbBr
3
are
still
unclear.
Here
dynamics
processes
of
LiBr
passivated
films
investigated
by
using
transient
absorption
spectroscopy
microscopy.
It's
found
that
there
is
a
fast
hot
process
with
above
bandgap
excitation,
would
decrease
population
cold
carriers
diffusible,
then
lower
constant.
proved
passivate
defect
probability
carriers,
thus
improve
rate.
finding
demonstrates
influence
to
film.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(13), С. 7847 - 7855
Опубликована: Янв. 1, 2024
TBAPF6
ionic
liquid
is
employed
to
treat
CsPbI3
perovskite
films,
and
thereby
low-dimensional
[TBA]PbI3
forms
on
the
surface
defects
are
passivated,
which
contribute
longer
moisture
stability
higher
PCE.
Nano Letters,
Год журнала:
2024,
Номер
24(34), С. 10418 - 10425
Опубликована: Авг. 19, 2024
Surface
ligand
chemistry
is
vital
to
control
the
synthesis,
diminish
surface
defects,
and
improve
electronic
coupling
of
quantum
dots
(QDs)
toward
emerging
applications
in
optoelectronic
devices.
Here,
we
successfully
develop
highly
homogeneous
dispersed
AgBiS
ACS Applied Energy Materials,
Год журнала:
2024,
Номер
7(9), С. 3709 - 3717
Опубликована: Май 2, 2024
Slowing
hot
carrier
(HC)
cooling
in
halide
perovskites
emerges
as
an
efficient
strategy
to
enhance
the
power
conversion
efficiency
(PCE)
of
perovskite
solar
cells
(PSCs).
This
approach
facilitates
rapid
extraction
HCs
before
they
dissipate
within
intricate
lattice
structure.
In
this
investigation,
we
delve
into
impact
amine-based
additives
on
relaxation
using
a
diamine
4,4′-diaminodiphenylmethaneiodide
salt
(MDA).
The
has
been
used
situ
additive
precursor.
ultrafast
femtosecond
transient
absorption
(fs-TA)
spectroscopy
study
confirms
that
diamine-modified
film
slows
HC
time
672
fs
from
control
(538
fs).
Moreover,
MDA
helps
improve
crystallization
and
passivate
traps
for
inhibiting
nonradiative
recombination,
leading
higher
PCE
compared
device.
passivated
devices
show
impressive
ambient
stability
retain
80%
initial
after
500
h.
Our
provides
in-depth
understanding
how
precise
through
engineering
can
PSC's
stability.
