Nonalloyed α-phase formamidinium lead triiodide solar cells through iodine intercalation
Science,
Год журнала:
2025,
Номер
387(6731), С. 284 - 290
Опубликована: Янв. 16, 2025
Formamidinium
lead
triiodide
(FAPbI
3
)
is
considered
the
most
promising
composition
for
high-performing
single-junction
solar
cells.
However,
nonalloyed
α-FAPbI
metastable
with
respect
to
photoinactive
δ-phase.
We
have
developed
a
kinetic
modulation
strategy
fabricate
high-quality
and
stable
films,
assisted
by
cogenetic
volatile
iodine
intercalation
decalation.
The
of
facilitated
formation
corner-sharing
Pb-I
framework
building
blocks
reduced
barrier
formation,
whereas
decalation
improved
final
perovskite
film
quality
in
terms
purity
overall
homogeneity.
Solar
cells
based
on
this
(free
other
extrinsic
ions)
achieved
power
conversion
efficiency
>24%.
devices
also
exhibited
excellent
durability,
retaining
99%
their
original
after
operating
more
than
1100
hours
at
85°
±
5°C
under
illumination.
Язык: Английский
Surface Template Realizing Oriented Perovskites for Highly Efficient Solar Cells
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 26, 2025
Abstract
Formamidinium
lead
iodide
(FAPbI
3
)
perovskite
films,
ensuring
optically
active
phase
purity
with
uniform
crystal
orientation,
are
ideal
for
photovoltaic
applications.
However,
the
α‐FAPbI
is
easy
to
degrade
into
δ‐phase
due
numerous
defects
within
randomly
oriented
films.
Here,
a
“quasi‐2D”
template
pre‐deposited
on
film
surface
crystallization
process
based
two‐step
preparation
technology,
which
directly
induced
pure
and
highly
orientated
of
across
downward
growth
process.
Furthermore,
enlarged
interaction
between
2D
components
colloidal
properties
delayed
effectively,
yielding
high
crystallinity
low
trap
state
density.
The
resulting
devices
exhibited
champion
efficiency
as
25.79%
comprehensively
improved
device
stability.
This
work
provides
new
insights
utilization
formation
mechanism
behind
perovskites.
Язык: Английский
Amine-rich polyethyleneimine enhanced vapor processed hole contacts for efficient and stable perovskite solar cells
Journal of Alloys and Compounds,
Год журнала:
2025,
Номер
unknown, С. 179811 - 179811
Опубликована: Март 1, 2025
Язык: Английский
Ordered crystal growth of 2D Ruddlesden–Popper perovskites via synergistic fluorination and chlorination for efficient and stable 2D/3D heterostructure perovskite solar cells
Shitong Du,
Wenbin Yang,
Wending Hao
и другие.
Chemical Engineering Journal,
Год журнала:
2025,
Номер
unknown, С. 162545 - 162545
Опубликована: Апрель 1, 2025
Язык: Английский
Mixed Antisolvent Strategy Enables Synergistic Crystallization Control and Defect Passivation in Perovskite Solar Cells
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 7, 2025
In
the
one-step
solution
method
of
perovskite
film
preparation,
antisolvents
are
widely
used
to
control
crystallization,
which
directly
influences
quality
films.
Herein,
hexafluorobenzene
(HFB)
was
involved
in
mixed
antisolvent
(MAS)
system
produce
high-quality
films
with
dual
functions
crystallization
and
defect
passivation.
Beyond
improving
interface
contact,
a
small
amount
HFB
remained
passivated
uncoordinated
Pb2+
defects.
Consequently,
HFB-involved
MAS-derived
exhibited
higher
crystallinity,
smoother
surfaces,
better
interfacial
contacts,
fewer
defects
than
those
without
additives.
These
enhancements
significantly
improved
open-circuit
voltage
(VOC)
fill
factor
(FF)
corresponding
solar
cells,
resulting
an
increase
power
conversion
efficiency
(PCE)
from
23.18%
24.53%.
Furthermore,
cells
prepared
by
this
stability.
This
study
highlights
facile
efficient
for
simultaneously
regulating
mitigating
incorporating
functionalized
antisolvents,
thus
photovoltaic
performance
cells.
Язык: Английский