Flexible
perovskite
solar
cells
(F‐PSCs)
are
promising
due
to
their
low
cost
and
versatility.
However,
the
thermal
instability
of
flexible
substrates
often
results
in
internal
defects
residual
stress
during
formation
films.
To
address
this
issue,
cellulose
diacetate
(CDA),
a
green
eco‐friendly
material
derived
from
natural
plant
fibers,
is
used.
CDA
not
only
enhanced
quality
films
but
also
reduced
generation
stress.
Furthermore,
it
effectively
passivates
that
arise
annealing
process.
As
result,
power
conversion
efficiency
24.68%
on
substrate,
which
one
highest
values
F‐PSCs,
achieved.
The
incorporation
lead
more
uniform
distribution
bending,
significantly
improving
long‐term
environmental
stability
devices.
This
sustainable
fiber‐based
approach
provides
new
direction
for
advancement
cells.
Abstract
Lanthanide‐based
NIR‐II‐emitting
materials
(1000–1700
nm)
show
promise
for
optoelectronic
devices,
phototherapy,
and
bioimaging.
However,
one
major
bottleneck
to
prevent
their
widespread
use
lies
in
low
quantum
efficiencies,
which
are
significantly
constrained
by
various
quenching
effects.
Here,
a
highly
oriented
(222)
facet
is
achieved
via
engineering
Cs
2
NaErCl
6
double
perovskites,
enabling
near‐complete
suppression
of
NIR‐II
luminescence
quenching.
The
optimally
(222)‐oriented
Ag
0.10
Na
0.90
ErCl
microcrystals
emit
Er
3+
1540
nm
light
with
unprecedented
high
efficiencies
90
±
6%
under
379
UV
excitation
(ultralarge
Stokes
shift
>1000
nm),
record
near‐unity
yield
98.6%
also
obtained
(222)‐based
NaYb
0.40
0.60
Cl
microcrystallites
980
excitation.
With
combined
experimental
theoretical
studies,
the
underlying
mechanism
facet‐dependent
emissions
revealed,
can
contribute
surface
asymmetry‐induced
breakdown
parity‐forbidden
transition
undesired
non‐radiative
processes.
Further,
role
reexamined
molecular
dynamics
based
on
two
facets,
highlighting
drastic
two‐phonon
coupling
effect
hydroxyl
group
4
I
13/2
level
.
Surface‐functionalized
facets
will
provide
new
insights
tunable
open
up
avenue
developing
efficient
emitters
toward
broad
applications.
Defects
around
the
surface
and
grain
boundaries
of
perovskite
films
normally
cause
severe
nonradiative
recombination
imbalanced
charge
carrier
transport,
further
limiting
both
efficiency
stability
solar
cells
(PSCs).
To
tackle
this
critical
issue,
we
propose
a
chemical
bridge
strategy
to
reconstruct
interface
using
organometallic
molecules.
The
commercially
available
molecule
bis(diphenylphosphino)ferrocene
(FcP2),
with
unique
molecular
structure,
anchors
chelates
Pb
atoms
by
forming
strong
Pb-P
bonds
passivates
surfaces
boundaries.
Detailed
characterization
revealed
that
FcP2
reconstruction
can
effectively
suppress
recombination,
electron
delocalization
properties
ferrocene
core
achieve
more
balanced
interfacial
transport.
resultant
N-i-P
PSC
device
outputs
close
25%
together
one
best
reported
operational
stabilities,
maintaining
over
95%
initial
after
1000
h
continuous
operation
at
maximum
power
point
under
1-sun
illumination.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 19, 2024
Abstract
The
commercialization
of
perovskite
solar
cells
(PSCs),
as
an
emerging
industry,
still
faces
competition
from
other
renewable
energy
technologies
in
the
market.
It
is
essential
to
ensure
that
PSCs
are
durable
and
stable
high‐temperature
environments
order
meet
varied
market
demands
hot
regions
or
seasons.
influence
high
temperatures
on
complex,
encompassing
factors
such
lattice
strain,
crystal
phase
changes,
creation
defects,
ion
movement.
Furthermore,
it
intensifies
vibrations
phonon
scattering,
which
turn
impacts
migration
rate
charge
carriers.
This
review
focuses
durability
organic–inorganic
hybrid
under
temperatures.
begins
by
analyzing
impact
external
temperature
variations
internal
dynamics
PSCs.
Subsequently,
outlines
various
mechanisms
provided
different
functional
molecules,
applied
interface
stabilization,
grain
boundary
passivation,
growth
control,
electrode
protection,
development
new
hole
transport
layers,
enhance
thermal
stability
Additionally,
machine
learning
(ML)
discussed
for
predicting
structure
stability,
operational
material
screening,
with
a
focus
potential
deep
explainable
artifical
intelligence
(AI)
techniques
Angewandte Chemie,
Год журнала:
2024,
Номер
136(39)
Опубликована: Июль 8, 2024
Abstract
Photoactive
black‐phase
formamidinium
lead
triiodide
(α‐FAPbI
3
)
perovskite
has
dominated
the
prevailing
high‐performance
solar
cells
(PSCs),
normally
for
those
spin‐coated,
conventional
n‐i‐p
structured
devices.
Unfortunately,
α‐FAPbI
not
been
made
full
use
of
its
advantages
in
inverted
p‐i‐n
PSCs
fabricated
via
blade‐coating
techniques
owing
to
uncontrollable
crystallization
kinetics
and
complicated
phase
evolution
FAPbI
perovskites
during
film
formation.
Herein,
a
customized
crystal
surface
energy
regulation
strategy
innovatively
developed
by
incorporating
0.5
mol
%
N‐aminoethylpiperazine
hydroiodide
(NAPI)
additive
into
crystal‐derived
ink,
which
enabled
formation
highly‐oriented
films.
We
deciphered
transformation
mechanisms
blade‐coated
films
combining
series
in‐situ
characterizations
theoretical
calculations.
Interestingly,
strong
chemical
interactions
between
NAPI
inorganic
Pb−I
framework
help
reduce
(100)
plane
42
%,
retard
rate
lower
.
Benefited
from
multifaceted
promoted
charge
extraction
suppressed
non‐radiative
recombination,
resultant
based
on
(100)‐oriented
realized
promising
efficiencies
up
24.16
(~26.5
higher
than
that
randomly‐oriented
counterparts),
accompanied
improved
operational
stability.
This
result
represented
one
best
performances
reported
date
‐based
scalable
deposition
methods.
Alkyl‐primary‐ammonium‐based
room‐temperature
ionic
liquids
(RTILs)
designed
to
exhibit
specific
reactivities
allowing
functions
that
cannot
be
achieved
by
other
RTILs
have
recently
emerged.
The
archetype
of
the
reactive
is
n
‐octylammonium
bis(trifluoromethanesulfonyl)imide
(OA‐TFSI),
which
has
promising
as
an
additive
for
hole
transport
materials
(HTMs)
in
perovskite
solar
cells
(PSCs);
high
reactivity
OA
cations
on
surface
allows
spontaneous
passivation
via
HTM
deposition,
effectively
improving
photovoltaic
(PV)
performance.
However,
although
manipulation
instrumental
exploiting
their
potential
and
exploring
application
scope,
methods
control
not
been
developed.
Herein,
it
proposed
coaddition
a
pyridine
derivative
(4‐
tert
‐butylpridine:
TBP)
can
manipulate
OA‐TFSI
controlling
protonation
between
2,2′,7,7′‐tetrakis‐(
N,N
‐di‐4‐methoxyphenylamino)‐9,9′‐spirobifluorene
(Spiro‐OMeTAD)
HTM.
TBP
prevents
deprotonation
presumably
stabilization
cation,
thus
retaining
its
ammonium
form,
efficient
passivation,
enhancing
PV
This
reveals
preference
system,
opposite
conventional
RTILs.
first
proposal
method
manipulating
will
contribute
development
science.
Accounts of Materials Research,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 30, 2024
ConspectusOrganic–inorganic
lead
halide
perovskite
solar
cells
(PSCs)
have
attracted
significant
interest
from
the
photovoltaic
(PV)
community
due
to
suitable
optoelectronic
properties,
low
manufacturing
cost,
and
tremendous
PV
performance
with
a
certified
power
conversion
efficiency
(PCE)
of
up
26.5%.
However,
long-term
operational
stability
should
be
guaranteed
for
future
commercialization.
Over
past
decade,
intensive
research
has
focused
on
improving
device
through
development
novel
charge
transport
materials,
additive
engineering,
compositional
interfacial
modifications,
synthesis
single
crystals.
In
this
Account,
we
provide
comprehensive
overview
recent
progress
directions
in
fabrication
highly
efficient
stable
PSCs,
including
key
outcomes
our
group.
We
begin
by
highlighting
critical
challenges
their
causes
that
are
detrimental
PSCs.
then
discuss
fundamentals
perovskites
optical
structural
properties.
This
is
followed
description
methods
crystals,
films,
various
architectures.
Next,
introduced
target-oriented
strategies
such
as
developing
high-quality
crystals
redissolution
precursor
fabricate
phase-stable
reproducible
along
reduced
material
costs,
employing
multifunctional
additives
get
uniform,
robust,
engineering
techniques
effective
surface
buried
interface
defect
passivation
improve
stability.
Finally,
conclude
assessment
perspective
Account
will
valuable
insights
into
current
state-of-the-art
PSCs
promising
tailored
specific
roles
can
combined
manipulate
structure
further
advancements.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(20), С. 11986 - 11994
Опубликована: Янв. 1, 2024
With
the
ability
to
absorb
UV
light
and
scavenge
radicals,
melatonin
modified
perovskite
exhibits
enhanced
anti-aging
resistance
UV-related
degradation.
