Nano-Micro Letters,
Год журнала:
2024,
Номер
17(1)
Опубликована: Окт. 10, 2024
Abstract
Layer-structured
Ruddlesden–Popper
(RP)
perovskites
(RPPs)
with
decent
stability
have
captured
the
imagination
of
photovoltaic
research
community
and
bring
hope
for
boosting
development
perovskite
solar
cell
(PSC)
technology.
However,
two-dimensional
(2D)
or
quasi-2D
RP
PSCs
are
encountered
some
challenges
large
exciton
binding
energy,
blocked
charge
transport
poor
film
quality,
which
restrict
their
performance.
Fortunately,
these
issues
can
be
readily
resolved
by
rationally
designing
spacer
cations
RPPs.
This
review
mainly
focuses
on
how
to
design
molecular
structures
organic
spacers
aims
endow
RPPs
outstanding
applications.
We
firstly
elucidated
important
roles
in
impacting
crystallization
kinetics,
transporting
ability
Then
we
brought
three
aspects
attention
spacers.
Finally,
presented
specific
structure
strategies
aiming
improve
performance
PSCs.
These
proposed
this
will
provide
new
avenues
develop
novel
advance
RPP
technology
future
Journal of Materials Chemistry C,
Год журнала:
2024,
Номер
12(12), С. 4184 - 4207
Опубликована: Янв. 1, 2024
Herein,
we
present
different
approaches
through
which
tin-based
perovskite
solar
cells
can
potentially
achieve
prolonged
stability
under
various
environmental
conditions
and
high
efficiency,
paving
the
way
for
future
commercialization.
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 26, 2025
Abstract
Tin
perovskite
solar
cells
(PSCs)
have
garnered
considerable
attention
as
promising
alternatives
to
lead
PSCs
due
their
lower
toxicity
and
outstanding
optoelectronic
properties.
However,
efficiency
stability,
particularly
in
2D/3D
tin
PSCs,
are
usually
hindered
by
high
defect
densities
inefficient
carrier
transport.
In
this
study,
a
small‐molecule
Lewis
base
with
multiple
functional
groups‐cyanoacetohydrazide
(CAH)
is
employed
mitigate
defects
enhance
charge
transport
PSCs.
It
revealed
that
the
carbonyl,
amine,
cyano
groups
CAH
form
strong
chemical
bonds
Sn
2+
ions,
resulting
synergetic
coordination
effects.
Moreover,
interaction
between
effectively
regulates
crystallization
process
of
film,
high‐quality
film
enhanced
crystallinity,
reduced
density,
modulated
phase
distribution.
As
result,
optimized
achieve
remarkable
power
conversion
15.06%,
marking
one
highest
values
for
Furthermore,
devices
exhibit
retaining
95%
initial
performance
after
2000
h
storage
nitrogen
atmosphere.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 24, 2025
Tin-based
perovskites,
characterized
by
their
advantageous
bandgap
and
much
lower
toxicity,
have
emerged
as
a
promising
alternative
to
lead-based
perovskites
in
solar
cell
applications.
However,
the
efficiency
stability
of
tin-based
perovskite
cells
(Sn-PSCs)
are
still
limited
defects
resulting
from
easy
oxidation
Sn2+
Sn4+.
Herein,
an
approach
enhance
optoelectronic
performance
Sn-PSCs
incorporating
terpyridine-zinc(II)
(ZnTPY)
coordination
nanosheets
(CONASHs),
synthesized
via
liquid-liquid
interfacial
polymerization,
into
is
delivered.
Following
physical
fragmentation,
ZnTPY
CONASHs,
enriched
with
unsaturated
terpyridine
groups,
undergo
multidentate
chelation
SnI2,
forming
ZnTPY:SnI2
heterogeneous
nuclei.
This
process
effectively
enhances
crystallization
while
mitigating
recombination
defect
chemistry
related
oxidation.
As
result
superior
crystal
quality,
CONASHs-modified
tin
exhibits
longer
photoluminescence
lifetime.
Consequently,
Sn-PSC
complex
achieves
power
conversion
11.59%,
compared
9.14%
for
control
device,
along
improved
operational
encapsulation.
Thus,
this
work
underscores
critical
role
regulating
precursor
solution
achieve
high-quality
films,
offering
pathway
more
efficient
stable
Sn-PSCs.
Advanced Materials,
Год журнала:
2023,
Номер
36(7)
Опубликована: Окт. 27, 2023
Abstract
Tin
halide
perovskites
are
an
appealing
alternative
to
lead
perovskites.
However,
owing
the
lower
redox
potential
of
Sn(II)/Sn(IV),
particularly
under
presence
oxygen
and
water,
accumulation
Sn(IV)
at
surface
layer
will
negatively
impact
device's
performance
stability.
To
this
end,
work
has
introduced
a
novel
multifunctional
molecule,
1,4‐phenyldimethylammonium
dibromide
diamine
(phDMADBr),
form
protective
on
Sn‐based
perovskite
films.
Strong
interactions
between
phDMADBr
improve
electron
transfer,
passivating
uncoordinated
Sn(II),
fortify
against
water
oxygen.
In
situ
grazing
incidence
wide‐angle
X‐ray
scattering
(GIWAXS)
analysis
confirms
enhanced
thermal
stability
quasi‐2D
phase,
hence
overall
perovskite.
Long‐term
in
devices
is
achieved,
retaining
over
90%
original
efficiency
for
more
than
200
hours
10%
RH
moisture
N
2
environment.
These
findings
propose
new
approach
enhance
operational
devices,
offering
strategy
advancing
lead‐free
optoelectronic
applications.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(32)
Опубликована: Май 15, 2024
As
a
leading
contender
to
replace
lead
halide
perovskites,
tin-based
perovskites
have
demonstrated
ever
increasing
performance
in
solar
cells
and
light-emitting
diodes
(LEDs).
They
tend
be
processed
with
dimethyl
sulfoxide
(DMSO)
solvent,
which
has
been
identified
as
major
contributor
the
Sn(II)
oxidation
during
film
fabrication,
posing
challenge
further
improvement
of
Sn-based
perovskites.
Herein,
we
use
NMR
spectroscopy
investigate
kinetics
SnI
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(52)
Опубликована: Авг. 24, 2024
Abstract
Unlike
single‐component
2D
metal
halide
perovskites
(MHPs)
exhibiting
sharp
excitonic
photoluminescence
(PL),
a
broadband
PL
emerges
in
mixed
Pb‐Sn
lattices.
Two
physical
models
–self‐trapped
exciton
and
defect‐induced
Stokes‐shift
–
are
proposed
to
explain
this
unconventional
phenomenon.
However,
the
explanations
provide
limited
rationalizations
without
consideration
of
formidable
compositional
space,
thus,
fundamental
origin
remains
elusive.
Herein,
high‐throughput
automated
experimental
workflow
is
established
systematically
explore
MHPs,
employing
PEA
(Phenethylammonium)
as
model
cation
known
work
rigid
organic
spacer.
Spectrally,
becomes
further
broadened
with
rapid
2
PbI
4
phase
segregation
increasing
Pb
concentrations
during
early‐stage
crystallization.
Counterintuitively,
MHPs
high
exhibit
prolonged
lifetimes.
Hyperspectral
microscopy
identifies
substantial
those
films,
hypothesizing
that
establishment
charge
transfer
excitons
by
upon
crystallization
at
high‐Pb
compositions
results
distinctive
properties.
These
indicate
two
independent
mechanisms—defect‐induced
Stoke‐shifts
segregation—coexist
which
significantly
correlates
Pb:Sn
ratio,
thereby
simultaneously
contributing
emission
HPs.
ACS Energy Letters,
Год журнала:
2023,
Номер
8(6), С. 2630 - 2640
Опубликована: Май 16, 2023
Organic-inorganic
Pb-free
layered
perovskites
are
efficient
broadband
emitters
and
thus
promising
materials
for
lighting
applications.
However,
their
synthetic
protocols
require
a
controlled
atmosphere,
high
temperature,
long
preparation
time.
This
hinders
the
potential
tunability
of
emission
through
organic
cations,
as
is
instead
common
practice
in
Pb-based
structures.
Here,
we
present
set
Sn-Br
perovskite-related
structures
that
display
different
chromaticity
coordinates
photoluminescence
quantum
yield
(PLQY)
up
to
80%,
depending
on
choice
monocation.
We
first
develop
protocol
performed
under
air
at
4
°C,
requiring
only
few
steps.
X-ray
3D
electron
diffraction
analyses
show
exhibit
diverse
octahedra
connectivity
(disconnected
face-sharing)
optical
properties,
while
preserving
organic-inorganic
layer
intercalation.
These
results
provide
key
insight
into
previously
underexplored
strategy
tune
color
cations
with
complex
molecular
configurations.
