Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 2, 2024
Abstract
Efficient
and
stable
red
perovskite
light‐emitting
diodes
(PeLEDs)
demonstrate
promising
potential
in
high‐definition
displays
biomedical
applications.
Although
significant
progress
has
been
made
device
performance,
meeting
commercial
demands
remains
a
challenge
the
aspects
of
long‐term
stability
high
external
quantum
efficiency
(EQE).
Here,
an
situ
crystallization
regulation
strategy
is
developed
for
optimizing
films
through
ingenious
vapor
design.
Mixed
containing
dimethyl
sulfoxide
carbon
disulfide
(CS
2
)
incorporated
to
conventional
annealing,
which
contributes
thermodynamics
dominated
well‐aligned
cascade
phase
arrangement.
Additionally,
surface
defect
density
minimized
by
CS
molecule
adsorption.
Consequently,
target
exhibit
smooth
exciton
energy
transfer,
reduced
density,
blocked
ion
migration
pathways.
Leveraging
these
advantages,
spectrally
PeLEDs
are
obtained
featuring
emission
at
668,
656,
648
nm,
yield
record
peak
EQEs
30.08%,
32.14%,
29.04%,
along
with
prolonged
half‐lifetimes
47.7,
60.0,
43.7
h
initial
luminances
140,
250,
270
cd
m
−2
,
respectively.
This
work
provides
universal
represents
stride
toward
commercialization
PeLEDs.
Energy Materials and Devices,
Год журнала:
2024,
Номер
2(1), С. 9370018 - 9370018
Опубликована: Фев. 2, 2024
Metal
halide
perovskite
solar
cells
(PSCs)
are
one
of
the
most
promising
photovoltaic
devices.
Over
time,
many
strategies
have
been
adopted
to
improve
PSC
efficiency,
and
certified
efficiency
has
reached
26.1%.
However,
only
a
few
research
groups
fabricated
PSCs
with
an
>25%,
indicating
that
achieving
this
remains
uncommon.
To
develop
industry,
outstanding
talent
must
be
reserved
latest
technologies.
Herein,
we
summarize
recent
developments
in
high-efficiency
(>25%)
highlight
their
effective
crystal
regulation,
interface
passivation,
component
layer
structural
design.
Finally,
propose
perspectives
based
on
current
further
enhance
promote
commercialization
process
PSCs.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Авг. 26, 2024
All-perovskite
tandem
solar
cells
have
shown
great
promise
in
breaking
the
Shockley–Queisser
limit
of
single-junction
cells.
However,
efficiency
improvement
all-perovskite
is
largely
hindered
by
surface
defects
induced
non-radiative
recombination
loss
Sn–Pb
mixed
narrow
bandgap
perovskite
films.
Here,
we
report
a
reconstruction
strategy
utilizing
polishing
agent,
1,4-butanediamine,
together
with
passivator,
ethylenediammonium
diiodide,
to
eliminate
Sn-related
and
passivate
organic
cation
halide
vacancy
on
Our
not
only
delivers
high-quality
films
close-to-ideal
stoichiometric
ratio
but
also
minimizes
energy
at
perovskite/electron
transport
layer
interface.
As
result,
our
bandgaps
1.32
1.25
eV
realize
power
conversion
efficiencies
22.65%
23.32%,
respectively.
Additionally,
further
obtain
certified
28.49%
two-junction
The
impacted
nonradiative
authors
utilize
agent
passivator
deliver
surface.
Advanced Energy Materials,
Год журнала:
2024,
Номер
14(13)
Опубликована: Янв. 10, 2024
Abstract
In
the
domain
of
perovskite
photovoltaics,
heterointerfaces
are
subject
to
substantial
trap‐assisted
non‐radiative
recombination,
predominantly
attributed
energy
offset,
interface
defects,
and
roughness
contact.
This
phenomenon
at
heterointerfaces,
where
carrier
recombination
dissipation
occur
due
defects
suboptimal
level
alignment,
can
be
principally
held
accountable
for
V
oc
losses.
Herein,
a
heterointerface
energetics
regulation
(HER)
strategy
is
proposed
by
introducing
potassium
trifluoroacetate
(KTFA)
in
precursor
solution
eliminate
trap
optimize
surface
potential
Fermi
level.
It
first
demonstrated
that
non‐doping
K
+
but
precipitating
upper
buried
will
improve
energy‐level
alignment
charge
extraction
dynamics.
addition,
TFA
−
exhibits
strong
electrostatic
force
with
undercoordinated
Pb
2+
contact
Sn
4+
SnO
2
electron
transporting
layer.
Based
on
vacuum
flash
evaporation
green
treatment
without
anti‐solvent,
Rb
0.02
(Cs
0.05
FA
0.95
)
0.98
PbI
0.91
Br
0.03
Cl
0.06
Cs
3
based
device
achieve
maximum
efficiency
23.36%
24.48%,
respectively.
Further,
modified
devices
exhibit
92%
initial
output
after
1200
h
aging.
HER
addressing
bandgap
poised
advance
both
performance
stability
solar
cells.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 2, 2024
Abstract
Efficient
and
stable
red
perovskite
light‐emitting
diodes
(PeLEDs)
demonstrate
promising
potential
in
high‐definition
displays
biomedical
applications.
Although
significant
progress
has
been
made
device
performance,
meeting
commercial
demands
remains
a
challenge
the
aspects
of
long‐term
stability
high
external
quantum
efficiency
(EQE).
Here,
an
situ
crystallization
regulation
strategy
is
developed
for
optimizing
films
through
ingenious
vapor
design.
Mixed
containing
dimethyl
sulfoxide
carbon
disulfide
(CS
2
)
incorporated
to
conventional
annealing,
which
contributes
thermodynamics
dominated
well‐aligned
cascade
phase
arrangement.
Additionally,
surface
defect
density
minimized
by
CS
molecule
adsorption.
Consequently,
target
exhibit
smooth
exciton
energy
transfer,
reduced
density,
blocked
ion
migration
pathways.
Leveraging
these
advantages,
spectrally
PeLEDs
are
obtained
featuring
emission
at
668,
656,
648
nm,
yield
record
peak
EQEs
30.08%,
32.14%,
29.04%,
along
with
prolonged
half‐lifetimes
47.7,
60.0,
43.7
h
initial
luminances
140,
250,
270
cd
m
−2
,
respectively.
This
work
provides
universal
represents
stride
toward
commercialization
PeLEDs.
