ACS Applied Electronic Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 14, 2025
Tin
(Sn)-based
perovskite
light-emitting
diodes
(PeLEDs)
have
garnered
significant
attention
owing
to
their
superior
optoelectronic
properties,
affordable
solution
processing,
and
environmental
friendliness.
However,
the
properties
of
Sn-PeLEDs
trail
those
lead
(Pb)
counterparts.
The
main
obstacle
is
easy
oxidation
Sn2+
Sn4+
as
well
fast
crystallization,
leading
poor
film
quality
with
many
defects.
Herein,
a
convenient
effective
interface
engineering
strategy
reported
fabricate
(2-thiopheneethylamine)2SnI4
(TEA2SnI4)
PeLEDs
by
introducing
different
peptides
into
PEDOT:PSS
hole-transport
layer
(HTL).
Benefiting
from
interaction
between
peptide
molecules
Sn-perovskite
nuclei,
crystallization
dynamics
are
effectively
adjusted,
an
improved
morphology.
At
same
time,
multiple
functional
groups
can
suppress
passivate
Therefore,
films
luminescence
efficiency
obtained.
further
used
for
fabrication
pure
red
enhanced
performance.
In
particular,
optimized
devices
based
on
Leu-Gly-Gly
(LGG)
achieve
peak
external
quantum
0.5%
brightness
136
cd
m–2,
which
about
2
3
times
larger,
respectively,
than
reference
device.
This
research
offers
general
improve
performance
via
engineering.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
64(1)
Опубликована: Окт. 15, 2024
Tin
halide
perovskites
are
the
most
promising
candidate
materials
for
lead-free
perovskite
solar
cells
(PSCs)
thanks
to
their
low
toxicity
and
ideal
band
gap
energies.
The
introduction
of
2D/3D
mixed
phases
in
tin-based
PSCs
(TPSCs)
has
proven
be
effective
approach
improving
device
efficiency
stability.
However,
a
2D
phase
normally
shows
relatively
carrier
mobility,
which
will
unfavorable
transfer
devices.
In
this
work,
we
used
thiophene-based
cation
2-(thiophen-3-yl)ethan-1-aminium
(3-TEA)
as
spacer
form
novel
TPSCs,
effect
on
performance
enhancement
comparison
with
other
cations
like
2-(thiophen-2-yl)ethan-1-aminium
(2-TEA)
benzene-based
2-phenylethan-1-aminium
(PEA).
Theoretical
calculations
reveal
that
3-TEA
enables
compact
crystal
packing
[SnI
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 24, 2024
Abstract
Metal
halide
perovskites
have
been
identified
as
a
promising
class
of
materials
for
light‐emitting
applications.
The
development
lead‐based
perovskite
diodes
(PeLEDs)
has
led
to
substantial
improvements,
with
external
quantum
efficiencies
(EQEs)
now
surpassing
30%
and
operational
lifetimes
comparable
those
organic
LEDs
(OLEDs).
However,
the
concern
over
potential
toxicity
lead
motivated
search
alternative
that
are
both
eco‐friendly
possess
excellent
optoelectronic
properties,
lead‐free
emerging
strong
contender.
In
this
review,
properties
various
emitters
analyzed,
particular
emphasis
on
more
well‐reported
tin‐based
variants.
Recent
progress
in
enhancing
device
through
refined
crystallization
processes
optimization
configurations
is
also
discussed.
Additionally,
remaining
challenges
examined,
propose
strategies
may
stable
operation.
Looking
forward,
future
developments
PeLEDs
considered,
including
extension
spectral
range,
adoption
deposition
techniques,
exploration
materials.
ACS Applied Electronic Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 7, 2025
Tin-based
perovskite
materials
are
arising
as
promising
contenders
for
high-efficiency
pure-red
light-emitting
diodes.
However,
the
primary
limitation
to
external
quantum
efficiency
(EQE)
of
tin-based
diodes
(Sn-PeLEDs)
stems
from
rapid
crystallization
processes
and
adverse
P-type
self-doping
effects.
In
this
study,
we
have
effectively
controlled
speed
perovskites
through
rational
interfacial
engineering
improved
stability
tin
halide
film.
We
utilized
ammonium
thiocyanate
(NH4SCN)
alter
properties
hole-transport
layer,
which
consists
poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)
(PEDOT:PSS).
Thiocyanate
ions
(SCN–)
can
form
interactions
with
Sn–I
frameworks.
This
not
only
slows
rate
but
also
suppresses
oxidation
Sn2+,
enhancing
its
passivating
defects
associated
undercoordinated
Sn2+.
results
in
smooth,
uniform,
compact
thin
films
that
eliminate
Sn4+
within
resulting
film,
leading
enhanced
radiative
recombination.
Sn-PeLEDs
devices
achieving
a
peak
EQE
5.8%,
approximately
4.6-fold
higher
than
control
device.
Additionally,
Commission
Internationale
de
L'Eclairage
(CIE)
coordinates
(0.69,
0.31)
demonstrate
close
conformity
National
Television
System
Committee
(NTSC)
standardized
red
standard,
indicating
high
degree
color
fidelity.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 10, 2025
Abstract
Perovskite
light‐emitting
diodes
(PeLEDs)
has
emerged
as
one
of
the
most
promising
technologies
for
next
generation
lighting
and
high‐definition
display
applications
due
to
their
exceptional
color
purity,
tunable
emission,
low
material
costs.
In
past
eleven
years,
PeLEDs
have
made
remarkable
progress
researchers
come
up
with
many
innovative
approaches.
Among
them,
additive
engineering
based
on
small
organic
molecules
(SOMs)
been
demonstrated
effective
strategies
enhance
external
quantum
efficiency
(EQE)
stability
PeLEDs.
Notably,
champion
EQEs
red,
green,
blue
devices
cannot
be
realized
without
participation
SOMs.
Here,
this
paper
first
reviews
development
PeLEDs,
followed
by
a
focused
discussion
specific
application
mechanism
SOMs
in
Lastly,
it
analyzes
challenges
provides
an
outlook
future
development.
ACS Applied Electronic Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 14, 2025
Tin
(Sn)-based
perovskite
light-emitting
diodes
(PeLEDs)
have
garnered
significant
attention
owing
to
their
superior
optoelectronic
properties,
affordable
solution
processing,
and
environmental
friendliness.
However,
the
properties
of
Sn-PeLEDs
trail
those
lead
(Pb)
counterparts.
The
main
obstacle
is
easy
oxidation
Sn2+
Sn4+
as
well
fast
crystallization,
leading
poor
film
quality
with
many
defects.
Herein,
a
convenient
effective
interface
engineering
strategy
reported
fabricate
(2-thiopheneethylamine)2SnI4
(TEA2SnI4)
PeLEDs
by
introducing
different
peptides
into
PEDOT:PSS
hole-transport
layer
(HTL).
Benefiting
from
interaction
between
peptide
molecules
Sn-perovskite
nuclei,
crystallization
dynamics
are
effectively
adjusted,
an
improved
morphology.
At
same
time,
multiple
functional
groups
can
suppress
passivate
Therefore,
films
luminescence
efficiency
obtained.
further
used
for
fabrication
pure
red
enhanced
performance.
In
particular,
optimized
devices
based
on
Leu-Gly-Gly
(LGG)
achieve
peak
external
quantum
0.5%
brightness
136
cd
m–2,
which
about
2
3
times
larger,
respectively,
than
reference
device.
This
research
offers
general
improve
performance
via
engineering.
