Advanced Functional Materials,
Год журнала:
2024,
Номер
34(48)
Опубликована: Авг. 5, 2024
Abstract
Reducing
non‐radiative
recombination
caused
by
defects
at
buried
interfaces
is
crucial
to
the
development
of
efficient
and
stable
perovskite
solar
cells
(PSCs).
Herein,
supramolecular
cucurbit[5]uril
(CB[5])
introduced
into
SnO
2
layer,
where
it
engages
in
host–guest
interactions
suppress
oxygen
vacancies
,
prevent
particle
aggregation,
enhance
electron
mobility
.
By
serving
as
a
bridging
agent
interface
between
CB[5]
reduces
defect
density
improves
carrier
extraction
efficiency.
It
also
enhanced
surface
energy
substrate,
facilitates
formation
large
grains
film,
alleviates
residual
lattice
stresses,
enhances
film
quality.
Consequently,
PSC
with
shows
champion
power
conversion
efficiency
24.83%.
Moreover,
an
unencapsulated
device
incorporating
retains
more
than
87%
its
initial
PCE
under
continuous
illumination
maximum
point
tracking
for
1000
h.
This
study
pioneers
utilization
cucurbiturils
PSCs
provides
insights
how
compounds
can
regulate
interfaces.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 15, 2024
Abstract
The
regulation
of
interfaces
remains
a
critical
and
challenging
aspect
in
the
pursuit
highly
efficient
stable
perovskite
solar
cells
(PSCs).
Here,
2,2′‐bipyridyl‐4,4′‐dicarboxylic
acid
(
HBPDC
)
is
incorporated
as
an
interfacial
layer
between
SnO
2
layers
PSCs.
two
carboxylic
moieties
on
bind
to
through
esterification,
while
its
nitrogen
atoms,
possessing
lone
electron
pairs,
interact
with
uncoordinated
lead
(Pb
2+
atoms
Lewis
acid‐base
interactions.
This
dual
functionality
enables
simultaneous
passivation
surface
defects
both
buried
layers.
In
addition,
electron‐deficient
nature
enhances
energy
band
alignment
facilitates
transfer
from
.
Furthermore,
incorporation
strengthens
adhesion,
improving
mechanical
reliability.
As
result,
PSCs
exhibited
impressive
power
conversion
efficiency
(PCE)
25.41
%
under
standard
AM
1.5G
conditions,
along
remarkable
environmental
stability.
Adjusting
the
hole
transport
layer
(HTL)
to
optimize
its
interface
with
perovskite
is
crucial
for
minimizing
recombination,
enhancing
carrier
extraction,
and
achieving
efficient
stable
inverted
solar
cells
(PSCs).
However,
as
a
commonly
used
HTL,
self-assemble
(SAM)
of
[2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl]
phosphonic
acid
(MeO-2PACz)
tends
form
clusters
micelles
during
deposition
process,
leading
inadequate
coverage
ITO
substrate.
Here,
Co-SAM
strategy
employed
by
incorporating
4-mercaptobenzoic
(SBA)
4-trifluoromethyl
benzoic
(TBA)
additives
into
MeO-2PACz
fabricate
Co-SAM-based
HTL.
The
introduced
additive
can
interact
MeO-2PACz,
facilitating
cluster
dispersion
thereby
enabling
better
on
improved
HTL
coverage.
Moreover,
exhibits
superior
energy
level
alignment
enhance
interfacial
contact
improve
extraction
efficiency
well
promote
growth
bottom
grains.
As
result,
an
impressive
increase
power
conversion
(PCE)
from
21.34%
23.31%
achieved
in
device
based
MeO-2PACz+TBA
while
maintaining
≈90%
initial
under
continuous
operation
at
1-sun.
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.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
17(19), С. 27651 - 27670
Опубликована: Май 2, 2025
Currently,
the
latest
photovoltaic
technology
based
on
perovskite
solar
cells
(PSCs)
has
attracted
much
attention
due
to
low
cost,
exciting
power
conversion
efficiency
of
over
26%,
large
scalability,
and
flexibility
PSCs.
During
development
course,
optimization
electron
transport
layer
(ETL)
plays
an
important
role
in
boosting
performance
PSCs,
where
use
modification
SnO2
with
high
chemical
stability,
low-temperature
processability,
suitable
energy
band
levels
substantially
are
shown
solve
problems
poor
charge
transport,
crystallization,
inferior
stability
at
PSC
interface.
Herein,
we
dedicate
ourselves
providing
a
comprehensive
review
advanced
ETL
for
realizing
efficient
The
fundamental
properties
its
key
as
PSCs
summarized
first.
Then,
typical
preparation
methods
introduced,
including
routes
physical
routes.
Sequentially,
state-of-the-art
strategies
optimizing
quality
discussed,
such
defect
regulation,
self-assembled
monolayer
modification,
double
construction.
Finally,
shed
some
light
existing
challenges
future
research
directions
large-scale
SnO2-based
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 30, 2025
Cesium
lead
iodide
perovskite
(CsPbI3)
is
a
class
of
promising
photovoltaic
materials
while
prone
to
undergo
spontaneous
transformation
from
the
photoactive
black
phase
nonphotoactive
yellow
under
ambient
conditions,
posing
significant
challenge
long-term
applications.
Herein,
buried
interface
regulation
strategy
reported,
where
crystalline
seeds
containing
bromide
ions
are
formed
on
substrates
through
treatment
with
cesium
prior
growth
CsPbI3.
This
results
in
initial
construction
thin
CsPbI3-xBrx
layer
high
lattice
matching
at
interface,
which
enables
subsequent
highly
oriented
CsPbI3
perovskites
that
effectively
enhances
their
stability.
Furthermore,
modified
substrate
reveals
greater
wettability,
leading
accelerated
crystallization
kinetics,
reduced
defect
density,
and
favorable
interfacial
charge
transfer.
Consequently,
corresponding
device
exhibits
simultaneous
promotion
both
photoelectric
performance
operational
