Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 1, 2024
Abstract
Wide‐bandgap
(WBG)
(
E
g
≥
1.65
eV)
perovskite
solar
cells
(PSCs)
made
from
mixed‐halide
strategy
experience
severe
photo‐induced
halide
segregation,
leading
to
detrimental
effects
on
the
long‐term
operational
stability.
Developing
single‐halogen
WBG
perovskites
can
be
fundamental
solution
prevent
segregation.
In
this
review,
recent
advances
in
PSCs,
focusing
cesium
(Cs)‐based
pure‐iodide
(I)
and
all
pure‐bromine
(Br)
species
is
summarized.
A
detailed
discussion
conducted
crystallization
dynamics
of
different
systems.
The
key
challenge
for
PSCs
huge
energy
loss
due
inferior
interfacial
level
alignment
high
defect
density
films,
which
greatly
hinders
efficiency
improvement.
To
end,
it
systematically
discuss
optimization
strategies,
including
regulating
crystallization,
passivating
defects,
achieving
aligned
levels,
eliminating
microstrain,
enhance
photovoltaic
performance
cells.
Furthermore,
highlighted
that
Cs‐based
pure‐I
encounter
significant
stability
issue
their
low
structural
tolerance
factor,
warranting
substantial
attention.
Finally,
perspectives
are
outlined
suggest
ways
further
advance
development
application
PSCs.
Angewandte Chemie,
Год журнала:
2024,
Номер
136(32)
Опубликована: Май 16, 2024
Abstract
The
passivation
of
the
defects
derived
from
rapid‐crystallization
with
electron‐donating
molecules
is
always
a
prerequisite
to
obtain
desirable
perovskite
films
for
efficient
and
stable
solar
cells,
thus,
in‐depth
understanding
on
correlations
between
molecular
structure
capacity
great
importance
screening
passivators.
Here,
we
introduce
double‐ended
amide
molecule
into
precursor
solution
modulate
crystallization
process
passivate
defects.
By
regulating
intermediate
bridging
skeletons
alkyl,
alkenyl
benzene
groups,
results
show
strength
highly
depends
spin‐state
electronic
that
serves
as
an
intrinsic
descriptor
determine
intramolecular
charge
distribution
by
controlling
orbital
electron
transfer
donor
segment
acceptor
segment.
Upon
careful
optimization,
benzene‐bridged
demonstrates
superior
efficacy
improving
film
quality.
As
physical
proof‐of‐concept,
carbon‐based,
all‐inorganic
CsPbI
2
Br
cell
delivers
significantly
increased
efficiency
15.51
%
remarkably
improved
stability.
Based
same
principle,
champion
24.20
further
obtained
inverted
(Cs
0.05
MA
FA
0.9
)Pb(I
0.93
0.07
)
3
cell.
These
findings
provide
new
fundamental
insights
influence
modulation
effective
cells.
Coatings,
Год журнала:
2024,
Номер
14(7), С. 918 - 918
Опубликована: Июль 22, 2024
All-inorganic
CsPbBr3
perovskite
solar
cells
have
garnered
extensive
attention
in
the
photovoltaic
domain
due
to
their
remarkable
environmental
stability.
Nevertheless,
prepared
using
conventional
sequential
deposition
method
suffers
from
issues
such
as
inferior
crystallinity,
low
phase
purity,
and
poor
film
morphology.
Herein,
we
propose
a
pre-crystallization
methodology
by
introducing
minute
quantity
of
CsBr
into
PbBr2
precursor
solution
generate
small
amount
CsPb2Br5
crystals
within
film,
leading
porous
with
enhanced
crystallinity.
Under
influence
more
pores
nucleation
sites
for
inducing
growth,
larger
crystal
size,
lower
grain
boundary
density,
stronger
higher
purity
is
formed.
Compared
untreated
devices,
devices
achieved
champion
conversion
efficiency
(PCE)
8.62%.
Furthermore,
pre-crystallized
demonstrate
stability
than
ones
can
still
retain
94%
original
PCE
after
being
exposed
air
1000
h
without
encapsulating.
Angewandte Chemie,
Год журнала:
2024,
Номер
137(1)
Опубликована: Сен. 6, 2024
Abstract
Fluoride
anion
(F
−
)
with
extremely
high
electronegativity
has
been
under
intensive
investigation
in
perovskite
solar
cells
due
to
its
remarkable
defect
suppression
and
great
improvement
of
device
performance.
Nevertheless,
these
researches
only
focus
on
the
surface,
grain
boundaries,
or
interface
modification,
direct
insertion
F
into
crystal
lattice
regular
lead
halide
films
is
still
unrevealed.
Herein,
was
successfully
incorporated
by
overcoming
insolubility
PbF
2
via
introduced
pyridinium
as
a
novel
volatile
solubilizing
ligand.
The
strong
can
strongly
increase
binding
energy
all
ions
CsPbI
Br
inhibit
their
formations.
A
trace
amount
incorporation
not
enhanced
optoelectronic
properties
but
also
effectively
mitigated
ion
migration
phase
separation
simultaneously.
photovoltaic
performance
operational
stability
were
significantly
improved
champion
efficiency
17.78
%
(38.01
%)
AM
1.5G
(1000
lux
indoor
light).
Moreover,
be
directly
inserted
hybrid
greatly
stabilized
crystal‐phase,
enabling
efficient
fully
MA‐free
FAPbI
3
devices
25.10
efficiency.
Our
strategy
sheds
light
F‐containing
perovskites
provides
promising
way
tackle
stabilize
perovskites.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 1, 2024
Abstract
Wide‐bandgap
(WBG)
(
E
g
≥
1.65
eV)
perovskite
solar
cells
(PSCs)
made
from
mixed‐halide
strategy
experience
severe
photo‐induced
halide
segregation,
leading
to
detrimental
effects
on
the
long‐term
operational
stability.
Developing
single‐halogen
WBG
perovskites
can
be
fundamental
solution
prevent
segregation.
In
this
review,
recent
advances
in
PSCs,
focusing
cesium
(Cs)‐based
pure‐iodide
(I)
and
all
pure‐bromine
(Br)
species
is
summarized.
A
detailed
discussion
conducted
crystallization
dynamics
of
different
systems.
The
key
challenge
for
PSCs
huge
energy
loss
due
inferior
interfacial
level
alignment
high
defect
density
films,
which
greatly
hinders
efficiency
improvement.
To
end,
it
systematically
discuss
optimization
strategies,
including
regulating
crystallization,
passivating
defects,
achieving
aligned
levels,
eliminating
microstrain,
enhance
photovoltaic
performance
cells.
Furthermore,
highlighted
that
Cs‐based
pure‐I
encounter
significant
stability
issue
their
low
structural
tolerance
factor,
warranting
substantial
attention.
Finally,
perspectives
are
outlined
suggest
ways
further
advance
development
application
PSCs.
