Angewandte Chemie,
Год журнала:
2024,
Номер
136(18)
Опубликована: Март 4, 2024
Abstract
CsPbI
3
perovskite
receives
tremendous
attention
for
photovoltaic
applications
due
to
its
ideal
band
gap
and
good
thermal
stability.
However,
solar
cells
(PSCs)
significantly
suffer
from
photovoltage
deficits
because
of
serious
interfacial
energy
losses
within
the
PSCs,
which
a
large
extent
affects
performance
PSCs.
Herein,
dipolar
chemical
bridge
(DCB)
is
constructed
between
TiO
2
layers
lower
thus
improve
charge
extraction
The
results
reveal
that
DCB
could
form
beneficial
dipole
layers,
optimize
energetics
perovskite/TiO
level
alignment
Meanwhile,
also
simultaneously
passivate
surface
defects
greatly
lowering
recombination.
Consequently,
deficit
PSCs
largely
reduced,
leading
record
efficiency
21.86
%
being
realized.
operation
stability
improved
high‐quality
films
with
released
tensile
strain
obtained
after
forming
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(18)
Опубликована: Март 4, 2024
Abstract
CsPbI
3
perovskite
receives
tremendous
attention
for
photovoltaic
applications
due
to
its
ideal
band
gap
and
good
thermal
stability.
However,
solar
cells
(PSCs)
significantly
suffer
from
photovoltage
deficits
because
of
serious
interfacial
energy
losses
within
the
PSCs,
which
a
large
extent
affects
performance
PSCs.
Herein,
dipolar
chemical
bridge
(DCB)
is
constructed
between
TiO
2
layers
lower
thus
improve
charge
extraction
The
results
reveal
that
DCB
could
form
beneficial
dipole
layers,
optimize
energetics
perovskite/TiO
level
alignment
Meanwhile,
also
simultaneously
passivate
surface
defects
greatly
lowering
recombination.
Consequently,
deficit
PSCs
largely
reduced,
leading
record
efficiency
21.86
%
being
realized.
operation
stability
improved
high‐quality
films
with
released
tensile
strain
obtained
after
forming
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(32)
Опубликована: Май 16, 2024
Abstract
The
passivation
of
the
defects
derived
from
rapid‐crystallization
with
electron‐donating
molecules
is
always
a
prerequisite
to
obtain
desirable
perovskite
films
for
efficient
and
stable
solar
cells,
thus,
in‐depth
understanding
on
correlations
between
molecular
structure
capacity
great
importance
screening
passivators.
Here,
we
introduce
double‐ended
amide
molecule
into
precursor
solution
modulate
crystallization
process
passivate
defects.
By
regulating
intermediate
bridging
skeletons
alkyl,
alkenyl
benzene
groups,
results
show
strength
highly
depends
spin‐state
electronic
that
serves
as
an
intrinsic
descriptor
determine
intramolecular
charge
distribution
by
controlling
orbital
electron
transfer
donor
segment
acceptor
segment.
Upon
careful
optimization,
benzene‐bridged
demonstrates
superior
efficacy
improving
film
quality.
As
physical
proof‐of‐concept,
carbon‐based,
all‐inorganic
CsPbI
2
Br
cell
delivers
significantly
increased
efficiency
15.51
%
remarkably
improved
stability.
Based
same
principle,
champion
24.20
further
obtained
inverted
(Cs
0.05
MA
FA
0.9
)Pb(I
0.93
0.07
)
3
cell.
These
findings
provide
new
fundamental
insights
influence
modulation
effective
cells.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(44)
Опубликована: Июль 16, 2024
Abstract
Perovskite
quantum
dots
(PQDs)
show
high
potential
for
new‐generation
light‐emitting
diodes
(LEDs)
due
to
their
outstanding
optoelectronic
properties.
Even
though
the
red
PQD‐LEDs
can
be
realized
through
mixing
halide
in
PQDs
tune
spectroscopies,
may
suffer
from
phase
separation
under
a
electric
field,
predominantly
affecting
LED
applications.
Herein,
ligand‐pinning‐assisted
approach
is
reported
spectroscopies
of
CsPbI
3
PQDs,
which
vinyl
phosphonic
acid
(VPA)
applied
as
function
ligands
regulate
nucleation
and
growth
during
synthesis.
Systematically
experimental
studies
theoretical
calculations
are
conducted
comprehensively
understand
functions
VPA
PQD
synthesis,
reveals
that
with
binding
energy
Pb
2+
cations
could
firmly
anchor
on
surface
matrix
without
desorption,
regulating
thus
resulting
tunable
being
realized.
Meanwhile,
also
renovate
defective
substantially
diminishing
trap‐induced
nonradiative
recombination.
Consequently,
deliver
external
efficiency
22.83%,
significantly
improved
compared
control
devices.
This
work
provides
new
avenue
toward
high‐performing
LEDs.
Abstract
Active
oxygen
highly
affects
the
efficiency
and
stability
of
perovskite
solar
cells
(PSCs)
owing
to
capacity
either
passivate
defects
or
decompose
lattice.
To
better
understand
in‐depth
interaction,
we
demonstrate
for
first
time
that
photooxidation
mechanism
in
all‐inorganic
film
dominates
phase
deterioration
kinetics
by
forming
superoxide
species
presence
light
oxygen,
which
is
significantly
different
from
organic‒inorganic
hybrid
even
tin‐based
perovskites.
In
perovskites,
prefer
oxidize
longer
weaker
Pb‒I
bond
PbO
I
2
,
leaving
much
stable
CsPbBr
3
phase.
From
this
chemical
proof‐of‐concept,
employ
an
organic
bioactive
factor,
Tanshinone
IIA,
as
a
sweeper
enhance
environmental
tolerance
inorganic
perovskite,
serving
“skincare”
agent
anti‐aging
organisms.
Combined
with
another
key
point
on
healing
defective
lattice,
best
carbon‐based
CsPbI
Br
cell
delivers
high
15.12%
superior
against
light,
humidity,
heat
attacks.
This
method
also
applicable
p‒i‒n
inverted
(Cs
0.05
MA
FA
0.9
)Pb(I
0.93
0.07
)
23.46%.
These
findings
not
only
help
us
decomposition
mechanisms
depth
but
provide
potential
strategy
advanced
PSC
platforms.
Energy & Environmental Science,
Год журнала:
2024,
Номер
17(16), С. 5756 - 5794
Опубликована: Янв. 1, 2024
This
review
comprehensively
discusses
the
latest
advances
in
surface
matrix
regulation
of
perovskite
quantum
dots
and
proposes
opportunities
challenges
for
high-performance
solar
cells.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(34), С. 23067 - 23075
Опубликована: Янв. 1, 2024
An
n/n
−
homojunction
at
the
top
perovskite/carbon
interface
is
realized
by
doping
natural
additive
for
accelerating
charge
extraction
and
suppressing
carrier
nonradiative
recombination
in
carbon-based
CsPbI
2
perovskite
solar
cells.
