Angewandte Chemie,
Год журнала:
2023,
Номер
135(39)
Опубликована: Июнь 16, 2023
Abstract
Sn
perovskite
solar
cells
have
been
regarded
as
one
of
the
most
promising
alternatives
to
Pb‐based
counterparts
due
their
low
toxicity
and
excellent
optoelectronic
properties.
However,
perovskites
are
notorious
feature
heavy
p‐doping
characteristics
possess
abundant
vacancy
defects,
which
result
in
under‐optimized
interfacial
energy
level
alignment
severe
nonradiative
recombination.
Here,
we
reported
a
synergic
“electron
defect
compensation”
strategy
simultaneously
modulate
electronic
structures
profiles
via
incorporating
traced
amount
(0.1
mol
%)
heterovalent
metal
halide
salts.
Consequently,
doping
modified
was
altered
from
p‐type
weak
(i.e.
up‐shifting
Fermi
by
~0.12
eV)
that
determinately
reducing
barrier
charge
extraction
effectively
suppressing
recombination
loss
throughout
bulk
film
at
relevant
interfaces.
Pioneeringly,
resultant
device
with
electron
compensation
realized
champion
efficiency
14.02
%,
is
~46
%
higher
than
control
(9.56
%).
Notably,
record‐high
photovoltage
1.013
V
attained,
corresponding
lowest
voltage
deficit
0.38
eV
date,
narrowing
gap
analogues
(~0.30
V).
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(39)
Опубликована: Июнь 16, 2023
Abstract
Sn
perovskite
solar
cells
have
been
regarded
as
one
of
the
most
promising
alternatives
to
Pb‐based
counterparts
due
their
low
toxicity
and
excellent
optoelectronic
properties.
However,
perovskites
are
notorious
feature
heavy
p‐doping
characteristics
possess
abundant
vacancy
defects,
which
result
in
under‐optimized
interfacial
energy
level
alignment
severe
nonradiative
recombination.
Here,
we
reported
a
synergic
“electron
defect
compensation”
strategy
simultaneously
modulate
electronic
structures
profiles
via
incorporating
traced
amount
(0.1
mol
%)
heterovalent
metal
halide
salts.
Consequently,
doping
modified
was
altered
from
p‐type
weak
(i.e.
up‐shifting
Fermi
by
∼0.12
eV)
that
determinately
reducing
barrier
charge
extraction
effectively
suppressing
recombination
loss
throughout
bulk
film
at
relevant
interfaces.
Pioneeringly,
resultant
device
with
electron
compensation
realized
champion
efficiency
14.02
%,
is
∼46
%
higher
than
control
(9.56
%).
Notably,
record‐high
photovoltage
1.013
V
attained,
corresponding
lowest
voltage
deficit
0.38
eV
date,
narrowing
gap
analogues
(∼0.30
V).
Chemical Reviews,
Год журнала:
2024,
Номер
124(7), С. 4079 - 4123
Опубликована: Март 25, 2024
All-perovskite
tandem
solar
cells
are
attracting
considerable
interest
in
photovoltaics
research,
owing
to
their
potential
surpass
the
theoretical
efficiency
limit
of
single-junction
cells,
a
cost-effective
sustainable
manner.
Thanks
bandgap-bowing
effect,
mixed
tin-lead
(Sn-Pb)
perovskites
possess
close
ideal
narrow
bandgap
for
constructing
matched
with
wide-bandgap
neat
lead-based
counterparts.
The
performance
all-perovskite
tandems,
however,
has
yet
reach
its
potential.
One
main
obstacles
that
need
be
overcome
is
the─oftentimes─low
quality
Sn-Pb
perovskite
films,
largely
caused
by
facile
oxidation
Sn(II)
Sn(IV),
as
well
difficult-to-control
film
crystallization
dynamics.
Additional
detrimental
imperfections
introduced
thin
film,
particularly
at
vulnerable
surfaces,
including
top
and
bottom
interfaces
grain
boundaries.
Due
these
issues,
resultant
device
distinctly
far
lower
than
theoretically
achievable
maximum
efficiency.
Robust
modifications
improvements
surfaces
films
therefore
critical
advancement
field.
This
Review
describes
origins
covers
efforts
made
so
toward
reaching
better
understanding
perovskites,
particular
respect
surface
improved
stability
cells.
In
addition,
we
also
outline
important
issues
integrating
subcells
achieving
reliable
efficient
double-
multi-junction
tandems.
Future
work
should
focus
on
characterization
visualization
specific
defects,
tracking
evolution
under
different
external
stimuli,
guiding
turn
processing
stable
cell
devices.
ACS Energy Letters,
Год журнала:
2024,
Номер
9(5), С. 1984 - 1992
Опубликована: Апрель 4, 2024
All-perovskite
tandem
solar
cells
have
exhibited
greater
potential
in
achieving
power
conversion
efficiencies
that
are
higher
than
those
of
single-junction
devices.
However,
commonly
used
I/Br
mixed
wide-bandgap
(WBG)
perovskites,
as
an
important
component
the
device,
always
show
a
photoinduced
halide
phase
segregation,
which
results
large
open-circuit
voltage
deficit
and
low
photostability
final
all-perovskite
cells.
In
this
work,
we
successfully
stabilized
WBG
perovskite
by
constructing
2D
wrapped
3D
structure
via
introducing
larger
organic
cation
2-(4-fluorophenyl)ethylamine
hydroiodide,
has
high
activation
energy
ion
migration
to
suppress
segregation.
The
phase-stable
achieved
1.35
V
with
efficiency
19.4%
retain
92.1%
their
initial
value
after
500
h
AM1.5G
illumination.
Finally,
constructed
27%.
Perovskite
solar
cells
(PSCs)
have
emerged
as
low-cost
photovoltaic
representatives.
Constructing
three-dimensional
(3D)/two-dimensional
(2D)
perovskite
heterostructures
has
been
shown
to
effectively
enhance
the
efficiency
and
stability
of
PSCs.
However,
further
enhancement
device
performance
is
still
largely
limited
by
inferior
conductivity
2D
capping
layer
its
mismatched
energy
level
with
3D
layer.
Here,
we
developed
an
effective
surface
modification
strategy
via
synergically
incorporating
inorganic
high
valence-state
niobium
ion
(Nb5+)
metal
dopants
organic
ammonium
halide
salts
in
situ
construct
a
high-quality
on
top
underlying
As
result,
was
enhanced
43%,
barrier
between
layers
favorably
reduced,
built-in
electric
field
3D/2D
heterostructured
stacks
enlarged.
In
addition,
also
reduced
defect
densities
up
29%,
verified
space-charge-limited-current
(SCLC)
tests.
Benefiting
from
facilitated
charge
extraction
suppressed
non-radiative
recombination,
blade-coated
hole
transport
layer-free
PSCs
based
this
optimized
film
achieved
23.2%,
∼19%
higher
than
that
control
(19.5%),
which
represented
one
best-performing
simplified
architecture
fabricated
scalable
fabrication
technique.
The
modified
perovskite-based
exhibited
improved
operational
stability.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(38)
Опубликована: Авг. 4, 2023
The
2D/3D
perovskite
heterostructures
have
been
widely
investigated
to
enhance
the
efficiency
and
stability
of
solar
cells
(PSCs).
However,
rational
manipulation
phase
distribution
energy
level
alignment
in
such
hybrids
are
still
great
challenge.
Herein,
we
successfully
achieved
spontaneous
by
concurrently
introducing
both
2D
component
organic
halide
additive.
graded
perovskites
with
different
n
values
3D
induced
favorable
band
across
film
boosted
charge
transfer
at
relevant
heterointerfaces.
Moreover,
also
acted
as
a
"band-aid"
simultaneously
passivate
defects
release
residual
tensile
stress
films.
Encouragingly,
blade-coated
PSCs
based
on
only
≈2
s
in-situ
fast
annealed
films
funnels
toughened
heterointerfaces
promising
efficiencies
22.5
%,
accompanied
extended
lifespan.
To
our
knowledge,
this
is
highest
reported
for
fabricated
energy-saved
thermal
treatment
just
within
few
seconds,
which
outperformed
those
state-of-the-art
annealing-free
analogues.
Such
two-second-in-situ-annealing
technique
could
save
cost
up
99.6
%
during
device
fabrication,
will
grant
its
low-coast
implementation.
Advanced Functional Materials,
Год журнала:
2023,
Номер
34(6)
Опубликована: Окт. 27, 2023
Abstract
Mixed
Sn–Pb
perovskites
with
narrow
bandgaps
and
high
optical
absorption
coefficients
are
promising
photovoltaic
materials.
However,
the
easy
oxidation
of
Sn
2+
fast
crystallization
mixed
still
limit
efficiency
perovskite
solar
cells
(PSCs).
Here,
an
imidazole
derivative
2‐(Aminomethyl)imidazole
dihydrochloride
(2‐AD)
to
suppress
improve
film
quality
through
coordination
/Pb
ions
is
introduced.
The
optimized
devices
show
a
power
conversion
22.31%
outstanding
long‐term
illumination
stability.
This
work
provides
effective
strategy
achieve
efficient
stable
PSCs.
Solar Energy Advances,
Год журнала:
2024,
Номер
4, С. 100056 - 100056
Опубликована: Янв. 1, 2024
The
optimization
the
bandgap
of
a
solar
cell
is
an
important
consideration
to
achieve
better
high
efficiency.
ideal
for
would
be
one
that
matches
energy
photons
in
spectrum,
allowing
efficient
absorption
light
and
conversion
into
electricity.In
current
study;
performance
perovskite-based
cells
was
investigated
numerically
band
gap
from
1.55
1.67
(eV)
using
one-dimensional
SCAPS
simulation
software
not
only
current-voltage
characteristics
but
also
complex
impedance
(Z*).
effects
perovskite
absorber
layer
were
evaluated
J-V
curves
have
shown
maximum
efficiency
achieved
at
1.61
(eV).From
analysis
(Z*)
data
observed
Nyquist
Bode
plots.
In
this
case;
further
war
carried
explorethe
modulus
(M*)
spectra.
Therefore
revealed
existence
tow
clears
maxima
de-convolution
approach
allowed
us
identify
origin
each
relaxation.
addition
electrical
parameters
such
as
relaxation
time
(τ1),
(τ2)
related
electron
recombination
ionic
transport
extracted.
Moreover,
good
correlation
obtained
between
all
I-V
explain
(eV).These
studies
basically
combinationof
provide
appropriate
path
Energy & Environmental Science,
Год журнала:
2024,
Номер
17(19), С. 6974 - 7016
Опубликована: Янв. 1, 2024
This
review
overviews
the
challenges
at
buried
interface
of
PSCs,
defect
passivation
capabilities
SAMs,
and
its
effectiveness
compared
to
other
passivating
agents.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 7, 2024
Narrow-bandgap
Sn-Pb
alloying
perovskites
showcased
great
potential
in
constructing
multiple-junction
perovskite
solar
cells
(PSCs)
with
efficiencies
approaching
or
exceeding
the
Shockley-Queisser
limit.
However,
uncontrollable
surface
metal
abundance
(Sn
