ACS Energy Letters,
Год журнала:
2024,
Номер
9(3), С. 1115 - 1124
Опубликована: Фев. 22, 2024
Perovskite
solar
cells
(PSCs)
are
attractive
due
to
their
fast-increasing
device
efficiency,
yet
further
improvement
is
limited
by
suboptimal
morphology
and
intrinsic
defects.
To
assess
how
the
widely
used
additive
engineering
impacts
crystal
growth
defect
passivation,
we
herein
propose
a
simple
but
effective
strategy
disentangle
influence
of
molecular
coordinating
strength
on
above
factors,
respectively.
By
fine-tuning
single
halide
atom
molecule,
can
transform
functional
role
from
only
normal
passivator
into
plus
crystal-growth
modifier,
rendered
tailored
competition
between
precursor–solvent
precursor–additive
interactions.
Thus,
optimized
PSCs
leveraged
deliver
PCE
over
24%
with
improved
stability.
The
unified
passivation
under
impact
here
provides
new
insights
designing
molecules
interest
push
envelope
PSCs'
efficiency.
Angewandte Chemie International Edition,
Год журнала:
2022,
Номер
62(6)
Опубликована: Дек. 8, 2022
Minimizing
surface
defect
is
vital
to
further
improve
power
conversion
efficiency
(PCE)
and
stability
of
inorganic
perovskite
solar
cells
(PSCs).
Herein,
we
designed
a
passivator
trifluoroacetamidine
(TFA)
suppress
CsPbI3-x
Brx
film
defects.
The
amidine
group
TFA
can
strongly
chelate
onto
the
iodide
vacancy,
strengthened
by
additional
hydrogen
bonds.
Moreover,
three
fluorine
atoms
allow
strong
intermolecular
connection
via
bonds,
thus
constructing
robust
shield
against
moisture.
TFA-treated
PSCs
exhibit
remarkably
suppressed
recombination,
yielding
record
PCEs
21.35
%
17.21
for
0.09
cm2
1.0
device
areas,
both
which
are
highest
all-inorganic
so
far.
also
achieves
PCE
39.78
under
indoor
illumination,
photovoltaic
devices.
Furthermore,
greatly
improves
ambient
preserving
93
initial
after
960
h.
ACS Central Science,
Год журнала:
2022,
Номер
8(7), С. 1008 - 1016
Опубликована: Июль 19, 2022
Research
on
solvent
chemistry,
particularly
for
halide
perovskite
intermediates,
has
been
advancing
the
development
of
solar
cells
(PSCs)
toward
commercial
applications.
A
predictive
understanding
effects
formation
is
thus
essential.
This
work
systematically
discloses
relationship
among
basicity
solvents,
solvent-contained
intermediate
structures,
and
intermediate-to-perovskite
α-FAPbI3
evolutions.
Depending
their
basicity,
solvents
exhibit
own
favorite
bonding
selection
with
FA+
or
Pb2+
cations
by
forming
either
hydrogen
bonds
coordination
bonds,
resulting
in
two
different
kinds
structures.
While
both
intermediates
can
be
evolved
into
below
δ-to-α
thermodynamic
temperature,
hydrogen-bond-favorable
kind
could
form
defect-less
via
sidestepping
break
strong
bonds.
The
disclosed
gaming
mechanism
guides
fabricating
high-quality
films
high-performance
PSCs
modules.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(22)
Опубликована: Март 31, 2023
Abstract
Perovskite
film
with
high
crystal
quality
is
fundamental
to
achieving
high‐performance
solar
cells.
A
fast
nucleation
process
crucial
improving
the
crystallization
quality.
Here,
we
propose
a
self‐driven
prenucleation
strategy
achieve
nucleation.
This
realized
through
rational
solvent
design.
The
key
characteristics
of
different
solvents
are
systematically
evaluated.
Among
them,
formamide,
ultra‐high
dielectric
constant,
low
Gutman
donor
number,
and
boiling
point,
selected
as
co‐solvent.
These
unique
render
formamide
double‐face
that
good
for
formamidinium
iodide
(FAI)
CsI
while
poor
PbI
2
.
As
result,
induces
‐DMSO
seeding
crystals
accelerates
nucleation,
crystalline
perovskite
film.
efficiency
hole
transport
layer‐free
carbon‐based
cells
boosted
beyond
19
%
first
time.
Advanced Materials,
Год журнала:
2023,
Номер
35(23)
Опубликована: Март 24, 2023
Sequential
deposition
has
been
widely
employed
to
modulate
the
crystallization
of
perovskite
solar
cells
because
it
can
avoid
formation
nucleation
centers
and
even
initial
in
precursor
solution.
However,
challenges
remain
overcoming
incomplete
random
transformation
PbI2
films
with
organic
ammonium
salts.
Herein,
a
unique
intermediate
phase
engineering
strategy
developed
by
simultaneously
introducing
2,2-azodi(2-methylbutyronitrile)
(AMBN)
both
salt
solutions
regulate
crystallization.
AMBN
not
only
coordinates
form
favorably
mesoporous
film
due
coordination
between
Pb2+
cyano
group
(C≡N),
but
also
suppresses
vigorous
activity
FA+
ions
interacting
FAI,
leading
full
preferred
orientation.
Therefore,
perovskites
favorable
facet
orientations
are
obtained,
defects
largely
suppressed
owing
passivation
uncoordinated
.
As
result,
champion
power
conversion
efficiency
over
25%
stabilized
24.8%
is
achieved.
Moreover,
device
exhibits
an
improved
operational
stability,
retaining
96%
under
1000
h
continuous
white-light
illumination
intensity
100
mW
cm-2
at
≈55
°C
N2
atmosphere.
Science,
Год журнала:
2024,
Номер
385(6705), С. 161 - 167
Опубликована: Июль 11, 2024
Black-phase
formamidinium
lead
iodide
(α-FAPbI
3
)
perovskites
are
the
desired
phase
for
photovoltaic
applications,
but
water
can
trigger
formation
of
photoinactive
impurity
phases
such
as
δ-FAPbI
.
We
show
that
classic
solvent
system
perovskite
fabrication
exacerbates
this
reproducibility
challenge.
The
conventional
coordinative
dimethyl
sulfoxide
(DMSO)
promoted
under
high
relative
humidity
(RH)
conditions
because
its
hygroscopic
nature.
introduced
chlorine-containing
organic
molecules
to
form
a
capping
layer
blocked
moisture
penetration
while
preserving
DMSO-based
complexes
regulate
crystal
growth.
report
power
conversion
efficiencies
>24.5%
solar
cells
fabricated
across
an
RH
range
20
60%,
and
23.4%
at
80%
RH.
unencapsulated
device
retained
96%
initial
performance
in
air
(with
40
60%
RH)
after
500-hour
maximum
point
operation.
iEnergy,
Год журнала:
2023,
Номер
2(3), С. 172 - 199
Опубликована: Сен. 1, 2023
Metal
halide
perovskite
solar
cell
(PSC)
has
successfully
distinguished
itself
in
optoelectronic
field
by
virtue
of
the
sharp
rise
power
conversion
efficiency
over
past
decade.
The
remarkable
breakthrough
at
such
a
fast
speed
can
be
mainly
attributed
to
comprehensive
study
on
film
deposition
techniques,
especially
effective
management
surface
and
interfacial
defects
recent
works.
Herein,
we
summarized
current
trends
performance
enhancement
for
PSCs,
with
focus
generally
applicable
strategies
high-performance
works,
involving
methods,
compositional
engineering,
additive
crystallization
manipulation,
charge
transport
material
selection,
passivation,
optical
coupling
effect
constructing
tandem
cells.
Promising
directions
perspectives
are
also
provided.
Advanced Materials,
Год журнала:
2024,
Номер
36(25)
Опубликована: Апрель 5, 2024
Despite
rapid
advancements
in
the
photovoltaic
efficiencies
of
perovskite
solar
cells
(PSCs),
their
operational
stability
remains
a
significant
challenge
for
commercialization.
This
instability
mainly
arises
from
light-induced
halide
ion
migration
and
subsequent
oxidation
into
iodine
(I
