The
development
of
inverted
all‐inorganic
perovskite
solar
cells
(PSCs)
is
limited
by
the
defect‐induced
nonradiative
recombination.
Herein,
a
strategy
to
enhance
efficiency
and
stability
p‐i‐n
type
CsPbI
2
Br
introducing
(3‐glycidyloxypropyl)trimethoxysilane
(GOPTS)
into
precursor
solution
reported.
incorporation
GOPTS
significantly
reduces
voids
grain
boundaries
in
films
fabricated
at
low
temperatures
(150
°C).
alkoxy,
epoxy,
ether
groups
effectively
passivate
uncoordinated
Pb,
diminishing
recombination
centers
associated
with
defects.
Density
functional
theory
simulations
suggest
that
increases
vacancy
formation
energies
Cs
I,
leading
reduced
Furthermore,
mitigates
photoinduced
phase
segregation
further
enhances
performance
PSCs.
This
modification
results
an
increase
power
conversion
cells,
from
11.83%
13.32%,
when
self‐assembled
monolayers
are
used
as
hole
transport
layer.
study
underscores
potential
silane‐based
additives
defect
passivation
for
perovskites,
providing
viable
route
advancement
high‐efficiency
cells.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 30, 2024
Abstract
The
inherent
defects
(lead
iodide
inversion
and
iodine
vacancy)
in
perovskites
cause
non‐radiative
recombination
there
is
also
ion
migration,
decreasing
the
efficiency
stability
of
perovskite
devices.
Eliminating
these
critical
for
achieving
high‐efficiency
solar
cells.
Herein,
an
organic
molecule
with
multiple
active
sites
(4,7‐bromo‐5,6‐fluoro‐2,1,3‐phenylpropyl
thiadiazole,
M4)
introduced
to
modify
upper
interface
perovskites.
When
M4
interacts
surface,
bromine
(Br)
site
lead
(Pb)
at
surface
repair
atomic
vacancy
defects.
fluorine
(F)
Pb
correct
octahedral
crystal
lattice
distortions
eliminate
I
Additionally,
sulfur–iodine
(S–I)
interactions
reduce
I–I
dimerization
It
calculated
that
energy
level
aligns
band
gap,
promoting
charge
transfer.
As
a
result,
devices
achieve
25.1%,
stabilized
power
output
(SPO)
25.0%,
voltage
1.19
V,
fill
factor
85.2%.
device
retains
95%
its
initial
after
2000
h
ageing
nitrogen
atmosphere.
Thus,
multi‐point
cooperative
passivation
provides
effective
method
improve
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Фев. 26, 2024
Abstract
In
recent
years,
the
power
conversion
efficiency
(PCE
(%))
of
perovskite
solar
cells
(PSCs)
has
improved
to
over
26%.
To
enhance
photovoltaic
properties
PSCs,
several
materials
for
electron
transport
layer
(ETL)
have
been
investigated.
Zinc
oxide
(ZnO)
is
a
significant
ETL
due
its
high
mobility
and
optical
transparency
in
PSCs.
As
result
various
deposition
methods,
ZnO
can
be
processed
at
low
temperatures.
On
other
hand,
based
on
studies,
metal-doped
facilitate
transfer,
thereby
improving
performance
un-doped
ETL-based
Here,
improve
PCE
(%)
long-term
stability
ETL-PSCs,
silver
(Ag)-doped
1wt%
as
buffer
examined.
this
paper,
with
addition
an
organic
solvent
(ethanol)
dispersion
Ag-doped
1
wt%
nanoparticles
(NPs)
deionized
(DI)
water,
morphology
(Ag-doped
wt%)
controlled.
This
approach
focuses
reducing
wettability
ZnO/Ag-doped
bilayer
ETLs
enhancing
ETL-PSCs.
According
results,
ZnO/H
2
O-ethanol
mixtures-Ag-doped
leads
formation
high-quality
defects,
recombination
rate,
ETL-PSCs
ambient
conditions.
Heliyon,
Год журнала:
2024,
Номер
10(10), С. e31138 - e31138
Опубликована: Май 1, 2024
In
perovskite
solar
cells
(PSCs),
the
charge
carrier
recombination
obstacles
mainly
occur
at
ETL/perovskite
and
HTL/perovskite
interfaces,
which
play
a
decisive
role
in
cell
performance.
Therefore,
this
study
aims
to
enhance
flexible
PSC
(FPSC)
efficiency
by
adding
newly
designed
CBz-PAI-interlayer
(simply
CBz-PAI-IL)
perovskite/HTL
interface.
addition,
substantial
work
has
been
carried
out
on
five
different
HTLs
(Se/Te-Cu
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(24), С. 31218 - 31227
Опубликована: Июнь 6, 2024
With
the
rapid
improvement
of
power
conversion
efficiency
(PCE),
perovskite
solar
cells
(PSCs)
have
broad
application
prospects
and
their
industrialization
will
be
next
step.
Nevertheless,
performance
long-term
stability
devices
are
limited
by
defect-induced
nonradiative
recombination
centers
ions'
migration
inside
films.
Here,
usnic
acid
(UA),
an
easy-to-obtain
efficient
natural
biomaterial
with
a
hydroxyl
functional
group
(−OH)
four
carbonyl
groups
(−C═O)
was
added
to
MAPbI3
precursor
regulate
crystallization
process
slowing
rate,
thereby
expanding
crystal
size
preparing
films
low
defect
density.
In
addition,
UA
anchors
uncoordinated
Pb2+
suppresses
I-ions,
which
enhances
film.
Consequently,
impressive
PCE
exceeding
20%
achieved
for
inverted
structure
MAPbI3-based
PSCs.
More
impressively,
optimized
PSCs
maintained
78%
initial
under
air
high
humidity
(RH
≈
65%,
25–30
°C)
1000
h.
can
extracted
from
plant,
usnea,
making
it
inexpensive
easy
obtain.
Our
work
demonstrates
plant
material
in
industrialization,
is
significant
nowadays.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 2, 2025
Abstract
Interface
engineering
has
emerged
as
an
effective
strategy
for
optimizing
the
charge
carrier
dynamics
in
perovskite
solar
cells,
and
design
of
modulators
plays
a
crucial
role
improving
interface
effects.
Here,
halogenated
ethylamine
hydrochloride
(XEA),
such
2‐fluoroethylamine
(FEA),
2‐chloroethylamine
(CEA),
or
(EA),
is
incorporated
into
buried
between
layer
(PVK)
SnO
2
electron
transport
(ETL)
to
assist
crystal
growth,
tune
energy
level
passivate
defects.
Pre‐embedded
XEA
interacts
with
PbI
form
2D
mesophase.
The
mesophase
assists
growth
orientation
epitaxial
perovskite,
resulting
uniform
films
larger
grains
higher
densification,
effectively
reducing
defects
caused
by
excess
at
interface.
NH
3
+
cation
X
−
anion
ions
on
fill
coordinate
vacancies,
passivating
perovskite.
Meanwhile,
introduction
adjusts
match
PVK/ETL,
compensating
loss
Consequently,
FEA‐modified
devices
exhibited
power
conversion
efficiency
24.7%,
featuring
exceptionally
high
open‐circuit
voltage
1.19
V
remarkable
stability.
Abstract
The
activation
of
C─H
bonds
under
mild
conditions
is
a
crucial
step
in
the
conversion
organic
molecules.
However,
simultaneous
methanol
can
result
excessive
oxidation,
thereby
diminishing
selectivity
for
formaldehyde
production.
We
achieved
selective
by
adjusting
proton
concentration
an
anhydrous
solution,
which
significantly
enhanced
dehydrogenation
rate
methanol.
Additionally,
we
constructed
related
molecular
models
to
identify
sites
asymmetric
providing
new
insights
further
studies
on
bond
activation.
