Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
unknown
Published: Sept. 3, 2023
Abstract
Wide‐bandgap
perovskites
are
of
paramount
importance
as
the
photoactive
layer
top
cell
in
high‐efficiency
tandem
solar
cells.
Comparably
high
Br
contents
required
to
widen
perovskite
bandgap.
However,
increase
content
causes
heterogeneous
halide
distribution
and
photoinstability.
Here,
positive
effect
additive
methylammonium
chloride
(MACl)
on
optical
electronic
properties
Br‐rich
perovskite,
deposited
using
N
‐methyl‐2‐pyrrolidone
(NMP)
co‐solvent
gas
quenching
method,
is
investigated.
Simultaneous
situ
grazing‐incidence
wide‐angle
X‐ray
scattering
photoluminescence
spectroscopy
used
track
evolution
structural
optoelectronic
with
different
amounts
MACl
during
spin‐coating
thermal
annealing
steps.
The
formation
mechanism
elucidated
presence
MACl.
It
observed
that
ions
inhibit
intermediate
phases,
favoring
a
phase
higher
crystallinity.
Nano
fluorescence
mapping
recognizes
Br‐richer
poorer
nanometric
domains,
whose
average
sizes
reduce
for
samples
In
conclusion,
it
demonstrated
adding
affects
wide‐bandgap
via
destabilization
phases
acts
homogenization
distribution,
leading
improved
performances.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(17)
Published: Sept. 7, 2023
Wide-bandgap
(WBG)
perovskites
have
attracted
considerable
attention
due
to
their
adjustable
bandgap
properties,
making
them
ideal
candidates
for
top
subcells
in
tandem
solar
cells
(TSCs).
However,
WBG
often
face
challenges
such
as
inhomogeneous
crystallization
and
severe
nonradiative
recombination
loss,
leading
high
open-circuit
voltage
(V
Science,
Journal Year:
2024,
Volume and Issue:
385(6708), P. 533 - 538
Published: Aug. 1, 2024
To
achieve
the
full
potential
of
monolithic
perovskite/silicon
tandem
solar
cells,
crystal
defects
and
film
inhomogeneities
in
perovskite
top
cell
must
be
minimized.
We
discuss
use
methylenediammonium
dichloride
as
an
additive
to
precursor
solution,
resulting
incorporation
situ–formed
tetrahydrotriazinium
(THTZ-H
+
)
into
lattice
upon
crystallization.
The
cyclic
nature
THTZ-H
cation
enables
a
strong
interaction
with
lead
octahedra
through
formation
hydrogen
bonds
iodide
multiple
directions.
This
structure
improves
device
power
conversion
efficiency
(PCE)
phase
stability
1.68
electron
volts
perovskites
under
prolonged
light
heat
exposure
1-sun
illumination
at
85°C.
Monolithic
tandems
incorporating
photo
absorber
reached
33.7%
independently
certified
PCE
for
area
1
square
centimeter.
Energy Reports,
Journal Year:
2024,
Volume and Issue:
11, P. 1171 - 1190
Published: Jan. 6, 2024
Organic-inorganic
hybrid
metal
halide
perovskite
solar
cells
(PSC)
represent
a
novel
class
of
optoelectronic
semiconductors
that
have
garnered
significant
attention
from
photovoltaic
researchers
globally.
This
is
due
to
their
continually
improving
efficiency,
straightforward
solution
processing
methods,
use
lightweight
and
cost-effective
materials,
other
notable
features.
The
advantageous
properties
such
as
superior
charge
transport,
tunable
band
gap,
distinctive
electronic
structure,
contribute
appeal.
Over
the
past
6
7
years,
diverse
device
architectures
fabrication
techniques
for
PSC
emerged,
achieving
an
impressive
power
conversion
efficiency
(PCE)
25.7%.
review
article
primarily
focuses
on
recent
advancements
in
techniques,
synthesis,
architecture,
transport
mechanisms,
gap
engineering,
stability.
Additionally,
it
provides
summary
recently
reported
materials
used
various
layers
PSC,
including
layer,
well
electron
hole
layers.
Lastly,
outlines
challenges
faced
development
offers
recommendations,
suggests
potential
directions
future
research
guide
field
forward.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(16)
Published: Jan. 8, 2024
Wide-bandgap
metal
halide
perovskites
have
demonstrated
promise
in
multijunction
photovoltaic
(PV)
cells.
However,
photoinduced
phase
segregation
and
the
resultant
low
open-circuit
voltage
(V
Science,
Journal Year:
2024,
Volume and Issue:
385(6708), P. 554 - 560
Published: Aug. 1, 2024
Wide-bandgap
(WBG)
absorbers
in
tandem
configurations
suffer
from
poor
crystallinity
and
weak
texture,
which
leads
to
severe
mixed
halide-cation
ion
migration
phase
segregation
during
practical
operation.
We
control
WBG
film
growth
insensitive
compositions
by
nucleating
the
3C
before
any
formation
of
bromine-rich
aggregates
2H
phases.
The
resultant
show
improved
strong
texture
with
suppressed
nonradiative
recombination
enhanced
resistance
various
aging
stresses.
Perovskite/silicon
solar
cells
achieve
power
conversion
efficiencies
29.4%
(28.8%
assessed
a
third
party)
25-square
centimeter
active
area
32.5%
1-square
area.
These
retained
98.3
90%
original
efficiency
after
1301
800
hours
operation
at
25°
50°C,
respectively,
maximum
point
(AM
1.5G
illumination,
full
spectrum,
1-sun)
when
encapsulated.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: May 25, 2024
Abstract
Wide‐bandgap
(WBG)
perovskite
solar
cells
(PSCs)
are
recognized
as
promising
candidates
for
diversified
photovoltaics
(PVs),
such
tandem
devices,
indoor
PVs,
and
semitransparent
building‐integrated
PVs.
However,
these
WBG
perovskites
made
from
a
mixed‐halides
strategy
suffer
severe
phase
segregation
under
continuous
illumination,
leading
to
exacerbated
non‐radiative
recombination,
consequently
decreased
open‐circuit
voltage
efficiency.
In
this
review,
the
generation
reversal
processes
of
in
meticulously
introduced.
Additionally,
major
characterization
techniques
presented.
A
detailed
summary
recent
progress
enhancing
photostability
PSCs
through
various
strategies
is
provided.
These
primarily
concentrate
on
composition
regulation,
crystallization
modulation,
inhibition
ion
migration,
strain
regulation.
Finally,
perspectives
potential
directions
carefully
discussed
promote
further
development
high‐efficiency
photostable
PSCs.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(23)
Published: Feb. 20, 2024
Abstract
Wide‐bandgap
mixed‐halogen
perovskite
materials
are
widely
used
as
top
cells
in
tandem
solar
cells.
However,
serious
open‐circuit
voltage
(
V
oc
)
loss
restricts
the
power
conversion
efficiency
(PCE)
of
wide‐bandgap
(PSCs).
Herein,
it
is
shown
that
resulting
methylammonium
vacancies
induce
lattice
distortion
chloride‐assisted
film,
an
inhomogeneous
halogen
distribution
and
low
.
Thus,
a
strain
regulation
strategy
reported
to
fabricate
high‐performance
PSCs.
Rubidium
(Rb)
cations
introduced
fill
A‐site
vacancy
caused
by
volatilization,
which
alleviates
shrinkage
crystal.
The
reduced
increased
halide
ion
migration
barrier
result
homogeneous
mixed‐halide
film.
Due
improved
carrier
transport
suppressed
nonradiative
recombination,
Rb‐treated
PSC
(1.68
eV)
achieves
excellent
PCE
21.72%,
accompanied
high
1.22
V.
device
maintains
more
than
90%
its
initial
after
1500
h
under
1‐sun
illumination
conditions.
ACS Energy Letters,
Journal Year:
2024,
Volume and Issue:
9(5), P. 1984 - 1992
Published: April 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%.
