Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 21, 2025
Abstract
Perovskite
solar
cells
(PSCs)
are
of
significant
interest
for
researchers
as
the
next‐generation
energy
harvesters.
However,
PSCs
suffer
from
traps
that
densely
distributed
at
interfaces,
which
deteriorate
device's
performance.
To
address
this
issue,
a
new
small
molecule
(DTAQTPPO)
capable
trap
passivation
on
perovskite
layer
surface
while
possessing
ambipolar
charge
extraction
properties
is
designed,
endow
DTAQTPPO
with
dual
functionality
both
interface
defect
passivator
and
efficient
hole/electron
extractor
in
n‐i‐p
p‐i‐n
architectures.
These
beneficial
effects
improve
power
conversion
efficiencies
(PCEs)
to
23.03%
23.55%
under
1
sun
37.18%
36.29%
1000
lux
light‐emitting
diode
(LED)
indoor
illuminations
architectures,
respectively,
after
incorporating
DTAQTPPO.
In
addition,
enhance
PV
using
an
anti‐solvent‐free
PCE
23.24%
35.47%
LED
illumination,
respectively.
results
suggest
can
be
widely
used
multifunctional
interlayer
versatile
device
architectures
various
light
illumination
conditions
generality
different
perovskites
processes.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 16, 2024
Abstract
Perovskite
solar
cells
have
emerged
as
a
potential
competitor
to
the
silicon
photovoltaic
technology.
The
most
representative
perovskite
employ
SnO
2
and
spiro‐OMeTAD
charge‐transport
materials.
Despite
their
high
efficiencies,
with
such
configuration
show
unsatisfactory
lifespan,
normally
attributed
instability
of
perovskites
spiro‐OMeTAD.
Limited
attention
was
paid
influence
,
an
inorganic
material,
on
device
stability.
Here
we
that
improving
redox
interfacial
modifier,
cobalt
hexammine
sulfamate,
simultaneously
enhances
power‐conversion
efficiency
(PCE)
stability
cells.
Redox
reactions
between
bivalent
complexes
oxygen
lead
formation
graded
distribution
trivalent
across
surface
bulk
regions
.
complex
at
top
raises
concentration
(SO
3
NH
)
−
which
passivates
uncoordinated
Pb
2+
relieves
tensile
stress,
facilitating
improved
crystallinity.
Our
approach
enables
PCEs
up
24.91
%.
devices
retained
93.8
%
initial
after
1000
hours
continuous
operation
under
maximum
power
point
tracking.
These
findings
showcase
modifiers
for
high‐performance
photovoltaics.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
147(1), С. 862 - 873
Опубликована: Дек. 20, 2024
The
desorption
of
conventional
ligands
from
the
surface
halide
perovskite
nanocrystals
(NCs)
often
causes
their
structural
instability
and
deterioration
optoelectronic
properties.
To
address
this
challenge,
we
present
an
approach
using
a
bidentate
Lewis
base
ligand,
namely,
1,4-bis(diphenylphosphino)butane
(DBPP),
for
synthesis
CsPbBr3
NCs.
phosphine
group
DBPP
has
strong
interaction
with
PbBr2
precursor,
forming
highly
crystalline
intermediate
complex
during
reaction.
In
presence
oleic
acid,
uncoordinated
is
converted
into
phosphonium
cation,
which
strongly
binds
to
bromide
formed
NCs
through
hydrogen
bonding.
Density
functional
theory
calculations
suggest
that
can
bind
undercoordinated
lead
ions
its
unprotonated
protonated
groups,
respectively.
robust
binding
helps
preserve
integrity
under
various
environmental
stresses.
Moreover,
electron
density
energy
levels
are
regulated
in
DBPP-capped
by
donation
electrons
NCs,
resulting
improved
photocatalytic
CO2
reduction
performance.
Our
study
highlights
potential
stabilize
modulate
optical
electronic
RSC Advances,
Год журнала:
2025,
Номер
15(9), С. 6678 - 6687
Опубликована: Янв. 1, 2025
Perovskite
solar
cells
(PSCs)
have
garnered
tremendous
interest
for
their
cost-effective
solution-based
fabrication
process
and
impressive
power
conversion
efficiency
(PCE).
Chemical Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Perovskite
materials,
with
their
tunable
band
gaps,
high
optical
absorption,
and
excellent
carrier
mobility,
are
key
candidates
for
lasers,
LEDs,
photodetectors,
solar
cells.
