ACS Photonics,
Journal Year:
2023,
Volume and Issue:
10(6), P. 1992 - 1998
Published: June 6, 2023
Tin
perovskite
is
rising
as
the
most
promising
lead-free
for
photovoltaic
applications.
However,
uncontrollable
kinetics
of
crystal
growth
brings
poor
quality
with
a
orientation
and
large
defect
density.
In
this
work,
we
explored
formamidine
acetate
(FAAc)
ammonium
iodide
(NH4I)
to
replace
generally
used
formamidinium
(FAI)
in
tin
film.
This
triple
reagent
(FAAc
+
NH4I
SnI2)
method
prolongs
reaction
path
It
impedes
three-dimensional
(3D)
structure
at
room
temperature
while
having
less
impact
on
low-dimensional
structure.
As
result,
formed
serves
seed
3D
subsequent
annealing.
The
film
grown
using
reactant
source
hence
shows
enhanced
long
carrier
lifetimes,
leading
an
efficiency
14.6%
solar
cells.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(38)
Published: June 13, 2023
The
defects
and
phase
segregation
in
perovskite
will
significantly
reduce
the
performance
stability
of
solar
cells
(PSCs).
In
this
work,
a
deformable
coumarin
is
employed
as
multifunctional
additive
for
formamidinium-cesium
(FA-Cs)
perovskite.
During
annealing
process
perovskite,
partial
decomposition
passivates
Pb2+
,
iodine,
organic
cation
defects.
Additionally,
can
affect
colloidal
size
distributions,
resulting
relatively
large
grain
good
crystallinity
target
film.
Hence,
carrier
extraction/transport
be
promoted,
trap-assisted
recombination
reduced,
energy
levels
are
optimized
films.
Furthermore,
treatment
release
residual
stress.
As
result,
champion
power
conversion
efficiencies
(PCEs)
23.18%
24.14%
obtained
Br-rich
(FA0.88
Cs0.12
PbI2.64
Br0.36
)
Br-poor
(FA0.96
Cs0.04
PbI2.8
Br0.12
based
devices,
respectively.
flexible
PSCs
on
exhibit
an
excellent
PCE
23.13%,
one
highest
values
reported
to
date.
Due
inhibition
segregation,
devices
thermal
light
stability.
This
work
provides
new
insights
into
engineering
passivating
defects,
stress
relief,
films,
offering
reliable
method
develop
state-of-the-art
cells.
Chemical Society Reviews,
Journal Year:
2023,
Volume and Issue:
52(11), P. 3842 - 3872
Published: Jan. 1, 2023
In
this
review,
the
key
factors
that
determined
air
stability
and
doping
efficiency
of
n-type
doped
organic
semiconductors
were
summarized,
together
with
discussion
their
applications
in
electronics.
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.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(2), P. 1657 - 1666
Published: Jan. 4, 2024
Perovskite
solar
cells
(PSCs)
that
incorporate
both
two-dimensional
(2D)
and
three-dimensional
(3D)
phases
possess
the
potential
to
combine
high
stability
of
2D
PSCs
with
superior
efficiency
3D
PSCs.
Here,
we
demonstrated
in
situ
phase
reconstruction
2D/3D
perovskites
using
a
perovskite
single-crystal-assisted
method.
A
gradient
distribution
RP
was
formed
after
spin-coating
solution
Ruddlesden–Popper
(RP)
single
crystal,
(DFP)2PbI4,
onto
surface,
followed
by
thermal
annealing.
The
resulting
film
exhibits
much
reduced
trap
density,
increased
carrier
mobility,
water
resistance.
As
result,
optimized
achieved
champion
24.87%
open-circuit
voltage
(VOC)
1.185
V.
This
performance
surpasses
control
device,
which
an
22.43%
VOC
1.129
Importantly,
unencapsulated
device
demonstrates
significantly
enhanced
operational
stability,
preserving
over
97%
its
original
continuous
light
irradiation
for
1500
h.
Moreover,
extrapolated
T80
lifetimes
surpass
5700
These
findings
pave
way
rational
regulation
at
interface
between
employing
crystals
achieve
stable
efficient
InfoMat,
Journal Year:
2024,
Volume and Issue:
6(4)
Published: Feb. 1, 2024
Abstract
Over
the
last
decade,
perovskite
solar
cells
(PSCs)
have
drawn
extensive
attention
owing
to
their
high
power
conversion
efficiency
(single
junction:
26.1%,
perovskite/silicon
tandem:
33.9%)
and
low
fabrication
cost.
However,
short
lifespan
of
PSCs
with
initial
still
blocks
practical
applications.
This
operational
instability
may
originate
from
intrinsic
extrinsic
degradation
materials
or
devices.
Although
lifetime
has
been
prolonged
through
component,
crystal,
defect,
interface,
encapsulation
engineering,
so
on,
systematic
analysis
failure
regularity
for
perspective
devices
against
multiple
operating
stressors
is
indispensable.
In
this
review,
we
start
elaboration
predominant
pathways
mechanism
under
working
stressors.
Then
strategies
improving
long‐term
durability
respect
fundamental
materials,
interface
designs,
device
summarized.
Meanwhile,
key
results
discussed
understand
limitation
assessing
stability,
potential
applications
in
indoor
photovoltaics
wearable
electronics
are
demonstrated.
Finally,
promising
proposals,
encompassing
material
processing,
film
formation,
strengthening,
structure
designing,
encapsulation,
provided
improve
stability
promote
commercialization.
image
Energy & Environmental Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Herein,
we
have
proposed
a
novel
tridentate
chelation
strategy
to
manage
the
excessive
amount
of
unreacted
PbI
2
in
perovskite
films,
achieving
inverted
PSC
device
with
PCE
25.66%
by
sequential
deposition
method.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(46)
Published: Sept. 26, 2023
The
use
of
dopant-free
hole
transport
layers
(HTLs)
is
critical
in
stabilizing
n-i-p
perovskite
solar
cells
(pero-SCs).
However,
these
HTL
materials
are
often
processed
with
toxic
solvents,
which
not
ideal
for
industrial
production.
Upon
substituting
them
green
a
trade-off
emerges
between
maintaining
the
high
crystallinity
and
ensuring
solubility
new
solvents.
In
this
paper,
we
designed
novel,
linear,
organic
small
molecule,
BDT-C8-3O,
by
introducing
an
asymmetric
polar
oligo(ethylene
glycol)
side
chain.
This
method
only
overcomes
limitations
solvents
but
also
enables
stacking
conjugated
main
chains
two
patterns,
further
enhances
mobility.
As
result,
pero-SCs
based
on
chlorobenzene-
or
(natural
compound)
solvent
3-methylcyclohexanone-processed
BDT-C8-3O
that
without
any
dopant
delivered
world-recorded
power
conversion
efficiencies
24.11
%
(certified
23.82
%)
23.53
%,
respectively.
devices
demonstrated
remarkable
operational
high-temperature
stabilities,
over
84
79.5
their
initial
efficiency
2000
h,
Encouragingly,
exhibits
significant
advantages
large-area
fabrication,
achieving
state-of-the-art
PCEs
exceeding
20
5×5
cm2
modules
(active
area:
15.64
),
even
when
using
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(12)
Published: Dec. 8, 2023
Abstract
At
present,
one
of
the
major
factors
limiting
further
improvement
inverted
(p‐i‐n)
perovskite
solar
cells
(PSCs)
is
trap‐assisted
non‐radiative
recombination
at
perovskite/electron
transporting
layer
(ETL)
interface.
Surface
passivation
with
organic
ammonium
salt
a
powerful
strategy
to
improve
performance
PSCs.
Herein,
an
effective
method
by
using
propylamine
hydroiodide
(PAI)
and
1,3‐diaminopropane
dihydroiodide
(PDADI)
reported
modify
perovskite/ETL
These
two
salts
do
not
form
new
but
directly
passivate
defects
on
surface
after
annealing.
The
results
show
that
PDADI‐modified
films
possess
lower
defect
density
less
as
well
improved
charge
carrier
transport.
Based
this
strategy,
p‐i‐n
PSCs
deliver
impressive
efficiency
25.09%
(certified
24.58%)
open‐circuit
voltage
1.184
V.
Furthermore,
unencapsulated
also
exhibit
good
storage
stability,
retaining
91%
initial
PCE
65
°C
in
N
2
glove
box
for
1300
h.
This
provides
efficient
route
fabricate
highly
stable
structured
Advanced Energy Materials,
Journal Year:
2023,
Volume and Issue:
13(29)
Published: June 18, 2023
Abstract
2D
Ruddlesden–Popper
perovskites
have
become
emerging
photovoltaic
materials
due
to
their
intrinsic
structure
stability.
Here,
a
concept
of
“quantum
confinement
breaking”
in
is
proposed
using
organic
semiconductor
spacers
with
suitable
energy
levels
based
on
theoretical
calculation
and
experimental
results.
An
interesting
finding
that
there
intensive
orbital
coupling
between
the
bithiophenemethylammonium
(BThMA)
spacer
adjacent
inorganic
layers
2
PbI
4
,
resulting
breaking
multiple
quantum
well
structure.
In
comparison,
no
interactions
exist
(BPhMA)
wide
bandgap
biphenemethylammonium
spacer.
Benefitting
from
improved
film
quality,
increased
dielectric
constant,
reduced
binding
energy,
MA
n
−1
Pb
I
3
+1
(
=
5)
perovskite‐based
device
displays
an
outstanding
power
conversion
efficiency
(PCE)
18.05%,
which
much
higher
than
BPhMA‐based
(PCE
12.69%)
among
best
PSCs
long
conjugated
spacers.
The
results
provide
important
implication
for
effects
[PbI
6
]
4−
octahedron
layer
performance
perovskite
solar
cells
other
optoelectronic
devices.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(1)
Published: Sept. 17, 2023
Abstract
Hole
transport
layer
(HTL)‐free
carbon‐based
perovskite
solar
cells
(C‐PSCs)
show
promising
commercial
application
potential
due
to
their
attractive
advantages
of
low
cost
and
high
stability.
However,
the
power
conversion
efficiency
C‐PSCs
is
relatively
low,
mainly
poor
crystalline
quality
C‐PSC
applicable
films
energy
level
mismatch
between
carbon
electrode.
Herein,
a
moisture‐induced
secondary
crystal
growth
strategy
simultaneously
improve
optimize
film
proposed.
The
presence
moisture
renders
surface
grains
reactive
by
forming
metastable
intermediates.
It
demonstrated
that
commonly
considered
harmful
intermediates
can
trigger
growth.
This
results
in
improved
crystallinity,
larger
grain
size,
better
morphology
films,
which
reduce
density
defect
states
also
benefit
interface
contact
Furthermore,
modulates
composition
achieve
an
optimized
alignment.
As
result,
this
reduces
charge
recombination
loss
accelerates
process
C‐PSCs.
Consequently,
new
record
19.52%
achieved
for
HTL‐free
