Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 7, 2025
Abstract
Tin‐halide
perovskites
(THPs)
offer
a
promising
alternative
to
lead‐halide
(LHPs),
addressing
environmental
concerns
while
providing
excellent
optoelectronic
properties.
However,
the
performance
of
THP
light‐emitting
diodes
(LEDs)
remains
inferior
their
counterparts
due
challenges
such
as
Sn
2
⁺
oxidation,
rapid
crystallization,
and
high
defect
densities.
Here,
for
first
time,
multifunctional
Lewis‐base
reducing
ligand
triphenylphosphine
(TPP)
is
reported,
which
simultaneously
suppresses
2+
oxidation
passivates
defects
in
2D
THPs
TEA
SnI
4
(TEA
represents
2‐thienylethylamine).
The
P
atom
TPP,
with
its
lone
pair
electrons
on
3p
orbital,
has
low
electronegativity
electron
density,
can
effectively
suppress
oxidation.
Furthermore,
σ‐donation
π‐conjugation
effects
from
three
phenyl
groups
TPP
molecule
enable
it
strongly
coordinate
,
.
These
properties
enhance
stability
THPs.
When
optimized
films
are
implemented
active
layers
LEDs,
they
exhibit
narrow
electroluminescence
full‐width
at
half‐maximum
28
nm,
Commission
Internationale
de
l'Eclairage
x‐coordinate
exceeding
0.7,
peak
external
quantum
efficiency
10.12%,
sevenfold
higher
than
pristine
devices.
This
work
demonstrates
potential
molecular
additives
device
tin‐based
perovskites.
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
15(1)
Published: July 10, 2023
Nowadays,
the
soar
of
photovoltaic
performance
perovskite
solar
cells
has
set
off
a
fever
in
study
metal
halide
materials.
The
excellent
optoelectronic
properties
and
defect
tolerance
feature
allow
to
be
employed
wide
variety
applications.
This
article
provides
holistic
review
over
current
progress
future
prospects
materials
representative
promising
applications,
including
traditional
devices
(solar
cells,
light-emitting
diodes,
photodetectors,
lasers),
cutting-edge
technologies
terms
neuromorphic
(artificial
synapses
memristors)
pressure-induced
emission.
highlights
fundamentals,
remaining
challenges
for
each
application,
aiming
provide
comprehensive
overview
development
status
navigation
research
devices.
Abstract
Metal
halide
perovskite
(MHP)
materials
have
shown
great
advantages
for
the
next‐generation
optoelectronic
devices,
especially
light‐emitting
diodes
(LEDs),
on
account
of
their
outstanding
photoelectric
properties
and
facile
solution
processability.
However,
performances
red
LEDs
(PeLEDs)
are
not
ready
commercialization,
presumably
due
to
instability
both
emission
spectra
operation
conditions,
toxicity
lead
ions.
In
this
review,
structures,
physical
properties,
preparation
approaches
emissive
first
introduced,
including
3D
bulk
perovskites,
2D
quasi‐2D
colloidal
nanocrystals
(NCs).
addition,
several
strategies
that
contribute
recent
development
achievement
PeLEDs
summarized
in
detail,
mainly
involving
component
engineering,
dimension,
phase
distribution
modulation,
ligand
additive
interfacial
light
out‐coupling
device
structure.
Moreover,
challenges
corresponding
solutions
discussed
from
three
aspects
spectral
stability,
operational
lead‐free
PeLEDs.
Finally,
conclusion
outlook
promising
future
raised.
ACS Energy Letters,
Journal Year:
2023,
Volume and Issue:
8(3), P. 1597 - 1605
Published: Feb. 24, 2023
Nontoxic
Sn-based
perovskite
light-emitting
diodes
(Pero-LEDs)
have
been
developing
rapidly
in
recent
years.
However,
high-quality
films
are
hardly
prepared
because
of
the
heavy
self-doping
Sn4+
as-prepared
films.
Most
previous
reports
indicate
that
formation
is
mainly
attributed
to
Sn2+
oxidation
by
external
oxidizers.
Here,
for
first
time,
we
reveal
disproportionation
decomposition
during
annealing
process
plays
a
critical
role
degrading
device
performance.
To
resolve
this
issue,
introduced
formamidine
thiocyanate
into
precursor
as
thermal-sacrificial
agent
alleviate
decomposition.
Finally,
achieved
efficient
Pero-LEDs
with
maximum
quantum
efficiency
5.3%
and
ultralow
roll-off.
This
work
provides
view
understanding
instability
presents
practical
method
achieve
suppressing
Sn2+.
Regulation
of
perovskite
growth
plays
a
critical
role
in
the
development
high-performance
optoelectronic
devices.
However,
judicious
control
grain
for
light
emitting
diodes
is
elusive
due
to
its
multiple
requirements
terms
morphology,
composition,
and
defect.
Herein,
we
demonstrate
supramolecular
dynamic
coordination
strategy
regulate
crystallization.
The
combined
use
crown
ether
sodium
trifluoroacetate
can
coordinate
with
A
site
B
cations
ABX3
perovskite,
respectively.
formation
structure
retard
nucleation,
while
transformation
intermediate
enables
release
components
slow
growth.
This
segmented
growth,
inducing
insular
nanocrystal
consist
low-dimensional
structure.
Light
diode
based
on
this
film
eventually
brings
peak
external
quantum
efficiency
up
23.9%,
ranking
among
highest
achieved.
homogeneous
nano-island
also
high-efficiency
large
area
(1
cm2)
device
21.6%,
record
high
value
13.6%
highly
semi-transparent
ones.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(29)
Published: April 25, 2023
Abstract
The
performance
of
tin
(Sn)‐based
perovskite
light‐emitting
diodes
(PeLEDs)
lags
behind
their
lead
analogs
due
to
the
challenges
Sn
2+
oxidation,
defect
passivation,
and
fast
crystallization.
Herein,
passivation
effects
diphenylphosphine
oxide
(DPPO)
derivatives
on
fabrication
PEA
2
SnI
4
films
are
investigated.
DPPO
with
hydroxyl
group,
or
including
substituent
group
potential
form
unfavorable
passivators
positive
in
accelerating
oxidation.
In
comparison,
amino‐functionalized
molecule
is
an
effective
additive
enhance
photoluminescence
as
well
crystallinity
improvement.
Based
optimized
films,
color‐stable
pure‐red
PeLEDs
demonstrated
a
full
width
at
half
maximum
23
nm
630
nm,
luminance
451
cd
m
−2
,
external
quantum
efficiency
3.51%,
half‐lifetime
13.7
min
102
.
This
work
opens
new
prospects
selection
molecular
additives
for
Sn‐based
perovskites.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
12(13)
Published: Jan. 31, 2024
Abstract
Lead
halide
perovskites
are
widely
used
and
intensively
studied
in
optoelectronic
devices
due
to
their
superior
properties.
However,
the
toxicity
of
Pb
hinders
industrialization
perovskite
devices.
Sn
has
a
similar
electronic
structure
Pb,
thus
been
as
an
alternative
Pb‐based
optoelectronics
recent
years.
In
this
review,
research
progress
luminescent
properties
synthesis
methods
2D
tin
summarized.
It
is
also
highlight
unique
dual
emission
phenomenon
summarize
several
types
possible
luminous
mechanisms.
At
last,
development
based
light‐emitting
diodes
overviewed,
challenges
oxidative
inhibition
efficiency
improvement
discussed.
This
review
expected
provide
comprehensive
perspective
on
diode
applications
perovskites.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(50)
Published: Oct. 27, 2023
With
increasing
ecological
and
environmental
concerns,
tin
(Sn)-based
perovskite
light-emitting
diodes
(PeLEDs)
are
competitive
candidates
for
future
displays
because
of
their
friendliness,
excellent
photoelectric
properties,
low-cost
solution-processed
fabrication.
Nonetheless,
electroluminescence
(EL)
performance
still
lags
behind
that
lead
(Pb)-based
PeLEDs
due
to
the
fast
crystallization
rate
Sn-based
films
undesired
oxidation
from
Sn2+
Sn4+
,
leading
poor
film
morphology
coverage,
as
well
high
density
defects.
Here,
we
propose
a
ligand
engineering
strategy
construct
high-quality
phenethylammonium
iodide
(PEA2
SnI4
)
by
using
L-glutathione
reduced
(GSH)
surface
ligands
toward
efficient
pure
red
PEA2
-based
PeLEDs.
We
show
hydrogen-bond
coordinate
interactions
between
GSH
effectively
reduce
perovskites
suppress
formation
The
improved
not
only
uniformity,
density,
coverage
but
also
exhibit
enhanced
optical
properties
stability.
Finally,
state-of-the-art
achieve
record
external
quantum
efficiency
9.32
%
in
field
devices.
This
work
demonstrates
represents
feasible
route
enhance
EL
